XAF XAFers Community Standup, 11 Jun 2020

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From YouTube: XAFers Community Standup - June 11th 2020 - Live QnA

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https://xafmarin.com/xafers-community-qna/

Join us the second Thursday of every month for our community standup covering everything that is going on with XAF, XPO, Blazor and more. There is no agenda, no formality, no dress code required, let's just talk about what we love and share our experiences.

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A

Welcome everybody to another, a sapphire community. They stand up. We meet once a month a second month. Second Thursday of every month we made here to discuss our South xpo or personal pearls community contributions and anything we want to share. We are really passionate, passionate about stuff, so I wanna. Thank everybody for joining again with me. Our expression will be Manuel, Jose and yama-chan. So I'm humbled to be part of this team that I have been following for their many years.

A

So without further ado I will let everybody introduce themselves because, most probably most of you already know, all of them by report. The ones of you who don't a please a manual. If you wanna start hi.

B

I'm Noel I'm from Austria I am perfect facility for almost for.

C

Over six years before ever, five.

B

Six years, or something like this and I'm working with death Express for almost ten years, yeah I do a lot of open source blogging about stuff helping people out. So if, if anybody needs help with access and training development or stuff like this call me out, there is my blog. We should link that down the script later. I can.

A

Actually put it on the on here and everybody can say: yeah you see, I only have to type blog and exactly have.

C

Yeah, if you want I guess you should mute all the other persons, because I'm hearing, like small conversation hi in the back I, will do that right now: okay, gotcha, okay, my turn, so one of my name is well I will say my fully Spanish name: Jose Manuel Ojeda. Most people know me for hoja, which is my childhood nickname I'm from in Salvador a small country, Central America. If you don't know where it is basically I've been working. We donate since day, one and also with developers.

C

This component since day, one I I come from a c-plus clothes background, but I don't do that anymore. So, basically in your company, what we do is like training for staff and we do like we do the planning for the architecture for other company. So if you need help on that, also you can show Xavier the blow and the website.

A

Yeah, hey Jose, Jose, Oh, hiya,.

C

Yeah, that's my blog, which is basically like my note path. When I don't want to forget something: I put it there. So I can google it later because you know how much time it takes to figure I'll, go and stuff that you think that you know, but you don't know actually and can you put like the website for the company yeah.

C

And well, that's the website, the website for a company we are located in Tallinn Estonia, but even even though, like the office are there like most of the time, everyone is all around the world. So that's it for me. Dave you're.

D

You're touring yeah dave has got I'm from Ontario Canada yeah I've been using xaf since it released in 2008 using DevExpress controls since about 2006 2007 before that working on kind of medical, imaging products just with be sharp and a little company in Toronto, and that we do now a lot of we did a lot of training. We've, we've kind of backed off on training, we're doing more individual consulting. We do a lot of cooking with companies in the US we have. We have one one client over in the UK.

D

We actually did an on-site visit, which is really cool, I, look for or five years ago,.

C

D

We help clients get get their products up and running and train them along the way. Great.

C

So now I'm going to do for all the other persons here at least the one who are presenting. What are you drinking so we're all drinking the same except one? Well, yeah.

D

C

E

We're all drinking for me and yeah everything it's hard to get the Canadian beer.

B

E

B

On vacation right, okay,.

C

So we're drinking Canadian beer lager as I think is five degrees. And what are you drinking money you're doing.

B

C

Who is different, yeah.

B

It's got, move our beer, it's my favourite beer from from Serena.

F

B

An awesome beer in in Styria upper a posterior, so it's it's got more, that the city is called morale and it's like they are probably beer since 1495, so they really would know how to prove it. And it's a it's.

E

C

My great so we'll make a choice for our next meeting. Also we'll have a discussion after that: ok guys who wants to start, let.

A

Me continue so after the introduction from Manuel Jose and John Dave from Jonathan I want to say: hey I have been following this guy for a long time and Jonathan's models are great, so you can take a look up there. Actually, let me pull it up here to the website and their folder snippets and I didn't experience right and their code snippet. They have really nice a class models as well as they're getting a started. A video. That's a really nice video for anyone who is starting with stuff.

A

Please go watch that video is really worth it. A HOSA has been doing a also. They will tamales that I'll. It has a really nice functionality. It has been creating videos for a few years already. So if you are a Spanish speaking, you will love that because there are not that much information in Spanish, but we also have a lot of English videos, man. Well, he goes from testing to package into the Windows 10 to do a lot of suspects practices so say any I do so if I can give.

B

You an advice, remove the newest kind of on the block is tasty, so yeah, probably later so I'm working all around I.

A

Was going about to say that I wasn't allowed to say that, but I wanted to you to break the ice. Oh I want to you, give the news, but if I can give any beginner today, advice is follow. These three suffers because you could really learn a lot about stuff in general. I know, I have so our stand up that we do every month them. The main goal is to enjoy it to grow. As a community and I have said before.

A

If we are to where, as a community, we can be very, we can grow up, we can help each other. We can collaborate, we can a still dead, expressing something that we need so and we pretty much have presence in every online rate area network we have facebook or Facebook group is already like for sharing with one member get it. If you wanna discuss you have here a way of doing linking. We have the frame the group here. You can follow us on Twitter, you can join or a meetup group.

A

You can subscribe to suffer squiggly so everywhere that you wanna see you. You will find the so. Please get in bowls, I want to chorus everybody to share more about the products about their experience as more grind more that always. The only thing that that does is make us better. So with that out of the way, we can quickly review a few things here, like we be the pacing shuffle software on Linux and it's running a severely. So that's really nice and really exciting news for the south community, because our servers are hosting cause.

A

It will decrease a lot because you have to pay for windows license you don't have to, and you have a lot of nice benefits here. One new loop ticket from the express is this outdated space with very silly. There is a nice syntax of people that not too comfortable with the criteria, and you just have to your face or default, put your genetic and your land expression butovo. So from the Facebook group, we asked actually now that I thought about it.

A

One of the things that I wanted to show you say: I'm, pretty sure you guys saw it, but one of the thing that we love about self is what we can do out with it. What we can improve on the community- and if you see here I, just want to point out someone that is doing a self application to help farmers in the western part of Honduras, with their crops after the CEO be reuniting. In fact, this is at the type of impact that we want to to know more about that.

A

We want to say: hey staff is great, but it's not because only we are passionate about a web bias is because we are doing real impact in real world real application, so just wanted to say congrats to news and race and from there on I think that I will do a quick, localization demo. That was one of the requests on the Facebook group and then we move from there. So I, don't quite remember the name of the of the surfers who watch for that localization. But it's pretty much. Let's create a new project.

A

Let's do one class locally, say Spanish, that's my language and we go from there. Okay and.

C

The funny thing is that my Spanish and Javier Spanish is not exactly the same. Sometimes the water we use means the opposite either.

F

C

And actually, what is more funny is that the word for right now for him, it means later. Okay, that's. How are you.

A

C

How it is yeah.

A

Let me put this for a second here: okay, so we just create a brand new application unless you start a new class, nothing crazy, less customer, as always.

A

And, let's just add to three properties: nothing, yes, I just want to show there a concept name.

A

Another and these are they called a code snippet from code Rouge, yeah ma chang has a lot of a code snippet that they also developed. So you can also go to the website and download those so pretty much. That's it. I create two properties, nothing crazy and let's look at how we can locally site this, for example, to Spanish so I'm going to put the model.

C

Did you compile because remember this I.

A

C

A

I did I just did here and then, let's choose you see my two years. Acting weird, you see is showing me here but is not showing the icon, but it is very displeased.

A

Let's see come on, that's what happening life like.

B

A

Same, oh god, okay, give me some things: I can change to their.

C

Own it once at least and.

A

C

It will show, but in general you have some problems with your studio because you're meeting icons, yeah not a good size, but.

A

I will say every time that I look a video of someone that I want to see how they did something and they Astro is doing it. I'm happy and saying: that's exactly saying issues that I have all the time. So he is not a bad thing. He just it feel.

B

Like that's totally totally accepted too, because if you do it exactly the way he did it and it doesn't work you don't you don't learn anything. But if you troubleshoot life, then exactly.

A

If you are having issues, if what you are actually doing it, because the only weight of you like if they're saying a phrase that who don't drive never getting an action.

B

A

Okay, so we have it here and let's open the modal and live free. If now I want okay, this.

B

Looks much better.

A

Yeah so let's choose the Spanish, because that's the one I would understand. I can translate to okay.

A

So now, I have to restart which I was two years old. A satellite assemblies get loose again so and we just closed.

F

A

A

Noble back again,.

A

And for everyone who is in the child listening we're going to do a life question on answer later. So, if you have any question, please feel free to be put it on the child and we're going to get to it in a little bit, and you have here Dave the Jose Annan Manuel, so don't hold back. Ask anything about geometry! Molds, as I was tasting us about anything, see ICD, anything you want. So, let's open them all up quickly.

A

And later, like a Spanish being.

A

So no, why didn't? Okay.

C

Because II, you don't say it safe. If you don't say.

F

C

Wouldn't it would not take it next time so do it again because he will load the satellite assemblies.

B

If anybody from the the XF team is watching this, this is definitely definitely something you exclu for much yeah.

A

Actually, last time Dennis was watching last time, I saw ten, each I wasn't sure it was him because we have a few Dennis on her Facebook group, but then he was watching so I'm really excited about that, because that means that the DevExpress team is also watching this and again it's like as a community being able to ask them hey. This is not working. This is working. This is good. This is great. Please can you improve this.

B

There is bottle on the line, yes, yeah.

A

I shagged me: there is a this new mode and then, when we change something, we're gonna go to date and see if that is actually so, if we say like Hispanics right and let's do anything so we can see, let's go to the to my and let's change something here, just to show that is changing here. So are you singing Spanish this direction? Okay, if I go here now and let's say.

A

You see that just hard a new note on the difference. So we know that is a localizing down. So one thing that we can do here and you see that I have issues with my icons, but there is a localization icon.

C

That should be like a like a planet earth like a world, something like that. Yeah.

A

Yeah so right here we have everything that we can translate and you can see everything here.

A

So if we pretty much look for that, a captions here from the let's say in the notepad we can just type customer I will give me all the let you select this one so right here, you see that you have directions and I can put name is nombre and customary in Spanish is Killian T, okay, so we save this and we can do that and we can actually actually let me show that we can export this as a CBS as a excel.

A

Do it in Excel and dream pull back and that will be good to a lot faster, a way. So now, after doing that, if we go to the language here and we select a Spanish, we compile.

A

And we right now.

C

A

C

Application is la plication.

A

C

B

The enter thing is about per default. They expect from the operating system, look exactly.

C

Of the trip so trail.

A

C

Will change if.

A

You see, we didn't explain not even like 10 minutes. Simon is talking about this and me doing this. Freestyle can be sorry, you see times, and we already have all our application in Spanish so is instead of file at Chivo, initio, beta, Dementors, steadily fresh, actually starkly empty, so I believe is really neat. I will need to give you a lot of power to get your application in the hands of a lot of future. That doesn't speak your language, that's pretty much it one thing that I could add to that is like.

A

Sometimes we have a string in your code and we can do use the the caption helper. So we create a note on the model and then we can translate everyday run butovo. So, if anyone's a has any question about localization, please put it on the chat say and we can move over.

C

I just want to add some.

F

C

Guess you should put the new people like in mute because listen to them, they're like fire, like tea, new persons that you should put on it and ok just about localization is like you can also translate it with a web service because it will, even if you click the translate button on the on go in that grid, that you saw there, it will go to a being web service, but the being web service will reject the translation. Is there more like I, don't know like 2000 characters, something like that.

C

So in the end it looks like it's broken, but it's not it's just as you're sending too much sticks, and also that doesn't depends on developer express it does depends on. On being so sorry,.

A

C

A

C

Something that will do it with google translator, but still is the same. You will always have some some limit, so the thing is that they, the missus, that you will get in the localization, to least note it's, the human readable you will say like 404, rejected by the server, doesn't mean anything. But actually the problem is that you're sending too much takes to be translated. So also that's something that you can improve. I mean we need to tell developer Express people about that that the message is not correct.

C

I mean we get a lot of questions because of that, because we have customers in Europe and in Europe in every five kilometers they speak some different language, so everyone tell me like is broken, it doesn't work and it's not it's like this much too much text. Actually so just a.

A

C

A

C

Transition to I want.

A

To answer a few things that the community is asking on the chat, they say the first one is buying he's asking if they, you cannot like a boat on your drop-down, where you can change the language dynamically and if you see here the feature center demo, they actually you can change the language of the application of the everything. So you can definitely do that. We're not gonna cover here, but you can reach out to us later on. If you have any doubt how to implement an you, can look for it in the support ticket.

A

There are a lot of a tickets, have a localization I mean. Definitely you can actually change the language dynamically or a.

B

Or just look at the code of the future center, it's.

A

Always a great.

B

It's always a great thing how they do stuff and structural stuff in the picture center. It's it's! What all it's not perfect valid production code, but it's almost every time I could think how to get started. If you don't have a light year or don't.

C

And also one resources, I guess you should check- is that there is a place we need to find out address area where they show like a percentage of how much is being translated already for the controls, like.

A

We have another I, actually have another question from Gustavo: he's saying that in Spanish the percentage of translation out of the book is 81.4, but we also have to be aware that a lot of the translation in the DevExpress has done for the community. Someone actually did the translation and share it with them and they use it. So there might be some cases that is not 100% in your language.

A

How you want it, but you have the possibility to to export that file changes and put exactly a locale war or anything you need to so is actually translated.

C

Because, as Gustavo said like, there is a percentage for each language and the biggest percentage will be for English. Of course it's a hundred percent, because it's like the zero language, then you will have the you, have a Spanish Russian Japanese and all of them I think that goes a German and like.

F

C

Like 90%, so those are.

F

C

Biggest ones, but if you speak Estonian, for example, I used to live in Tallinn Estonia, it's like zero percent. Someone used to do the translations. If you live in Finland also it is the same so forth for I mean the smaller. The population is for the language, the less likely to be like hundred percent translators. You will have to do more translation for yourself.

A

So and one of our more engaged suffers that he saw is young on a community stand up, Jacek he's asking HOA before, but I want to use, though we just validate this age. I said you can definitely export the file for translation, give it to someone else. They have tengo de fallar.

C

Don't you do it, I mean it's like one. Second, you have the sunlight. Okay, hi tender a child, but we can definitely do it. I know, I see we were watching that before and no do it from the manga.

F

Studios from the.

C

A

Mo village for a second.

A

Okay, so this one some reason: I don't have the icons or, let's fix poor old records and let's.

A

Put it on my desk go quickly so right here they said you will be able to send this to anyone and say hey. This is the English a wording I need you to fill out all the Spanish in wording. Then you can import that and you boo, okay, perfect.

A

So if there is no other questions, let's move over the second question that we had when I asked for suggestion for this a community stand up was a kid from Canada, actually he's hearing a delay in the sign, the chat with us, and he was having some a question about controllers in general. Win this controller want to use the windows, controller, want to use the view controller and so on. So David did wanna.

A

Take this one remove yourself, you take this one yeah and what I did on a kid he was having so many questions about controllers in general and pretty much is just giving an overview of what controller is windows, control, blood, sugar control base view controllers and undersea absolutely.

D

So I may see if I can bring in my screen here real quick.

D

So basically view controllers windows controllers both inherit from the same intuitive base and they're just used in different contexts, depending on how you want them to behave. So let me bring in my visual studio without of my projects up here then I'll share my screen. Alright,.

A

Let me ask up sharing then myself, so you can actually share your since believe it yeah.

A

Again, thanks everybody for showing up is great to see a so many surfers connected to community stand up. hmm Can you make me give.

D

Me rice represents yeah, absolutely.

A

Okay, you should be able to do it now.

D

To users try the other one I'm on.

C

D

A

I came down because I make you a host I think that the other users have to give you permission uh-oh. You.

D

Made me nervous yeah.

C

I mean there is actually one stove. It's like a permission that you, without changing the hose you can tell like everyone is allowed to share the screen. Yeah.

A

I didn't want to waste too much time on finding dad so I, just making a house completely unlit it. There.

D

We go, I got those now.

G

All the security Oh everywhere.

D

There we go, we should build some ice cream there, we go yeah all right, okay, this is gonna, be a solution. Eight, because why not and I'm gonna do windows. I, always I, always start with the windows project. Just because I like finished projects, blank Oh.

D

What hang on, maybe I didn't mean to do that. I wish.

C

I could choose.

G

D

C

D

Mean you can watch me struggle through.

B

D

A basic filter- it's gonna, work there, because our team love this.

D

C

Always like naming like delete me, the solutions have to delete them later. I mean.

D

I've managed my machine at least once a year, usually twice a year, no.

C

D

Like every month so.

C

You lose all your VP projects when you do this thing. Is that virtualization truly build police ation, so you mean, if I restarted when I start again, they have the same mess of my profile. Folder.

D

Ok, so if you're not familiar with the snippets that we use, if you use code rush great, we Lama chant have code snippets that we use to make things a little quicker, which are usually prop except giving us our list of quickly credible properties going to a string for name. Do a string, email address and a date time start date.

D

D

And it won't do my association I'm doing a prop except one in this case this is going to be a client and then on the client side, I'm doing a prop xaf collection, like you aggregated, you can do aggregated, because the client basically owns the contacts. It's not come from a shared pool.

D

And that's it get connection string going here.

D

So controllers, let you interact with views. The business objects with other controllers, with templates right everything you want to be doing with the application you're generally doing for my controller. So the question is: are you doing it from a Windows controller? Are you doing it from a view controller and then, if you're, using a view controller, are you using the kind of base view controller or are you doing a object view controller where you can scope it download a third of this? So here's my basic application, I'm gonna, put the Acme company.

D

Date, great contact.

D

Go and we'll go ahead and just create a controller straight out of the box. Nothing nothing exciting about it first.

D

So when you're deciding where to put your controller, that's where you get some consideration going in terms of scope. Are you going to have this interacting with an individual control or a template that is platform specific so that my dealing of the windows control or a web control? Or is it just a controller that I need to apply across all platforms? So that's the case here in that case, I'm going to put it in the module if I'm doing platform.

D

Specific, of course has to be in that platform, specific module and then there's two two approaches to creating controllers, either through the add DevExpress item or just a straight class. If you use the add DevExpress item with a view controller, you get the designer component, which is really nice. So let's do a sample view. Controller.

D

So now I have the designer, in the background, I have the controller code. If you're doing it just in code. It's great you don't have to use a have to worry about the designer piece of it, but you have to code in the actions that's manually, so.

G

Let's just hope that whole blog post about that you can read up on me. How do you do perfect yeah? My toolbox is initializing.

D

Oh, it's not one of the bad ones. Today, let me drop just a simple action on here and well. Let's call this action.

D

So because I haven't defined any kind of scope to this controller, it's gonna be available everywhere. You see I've test action up here, which is a contacts list view which is actually the client underscore contacts which the list view didn't do anything, and that's also on the client detail view. So it's up here if I go back to the client list view it's also here. So there's no scope to this at all. It's just everywhere and that's for every single view. That's why it's called a view controller.

D

If I was doing a window controller, we can go back and change that look, quick, go back in code and the only thing that defines it is this piece right here: controller again has no scope on it. Oh hang on candy tube. You can close created, there's no ghost created than understory.

D

So you're gonna see I have two two actions here now within this window and that's because this is a window, and this is also an embedded window I'm using the tabbed MDI you'll notice that my subplot my sub view here. My nested list view doesn't have that controller because it doesn't have its own window. It's just a view. So that's the difference between a view, controller and a window controllers really to what level of scope to you'll, even notice that things like the pop-ups. That's a date popup.

D

We pick contact I'm gonna work on a pop-up view. Button yeah, you wouldn't see it here, yeah, so there's, basically, there's main windows and there's nested windows. You can choose to scope this down to and scope is really important when you're, creating controllers people I see it all the time or they'll, add an action and then they'll scope the action rather than scope, the whole controller and basically, when you scope a controller down which is back to a view, controller, because it lets go you're basically saying what context am I using this end?

D

So am I using it on a particular view or a view type or an object type. So if we look at the, if we look the properties over here on the view controller itself, you can see the target view.

D

Id I can specify particular ID or view nesting, whether it be root or nested, and then the target view type would be a detail view list view or dashboard view, and also the target object, type I shouldn't click that takes room come on, wasn't too bad today, a nice change that came about probably I, want to say three or four years ago was the ability to specify multiple target detail, views just separated by a thing as a commerce that I you knew that.

B

It's a nickel, long, okay, it was.

A

I was answering a question on the chat. Can you say that again what we didn't you I.

C

Mean you can like it specified like more than one view: ID yeah.

A

Yeah, you can actually say any bad it semicolon, and this oil one. So it would be for everything except that one. So there are a lot of permutation. There doesn't really nice. That is you for me. Irishman.

D

Ooh yeah really cool they've done that, but the the scope is really important because it really defines where this thing's gonna show up, and some people will keep the controller, not scope down at all and they'll just scope down the action.

D

The issue with that is it. The controller then gets created for every view, even though you're only using the action with the only purpose of this controller is to have that action, it's being used everywhere. It doesn't we to be so I, usually recommend the people scope that down out the control instead, and you can use the designer to do that personally, but we've done over time we've we started putting the targets up here to be like targeting you typing.

D

Equals view type list view and then, if I want to put a target object, eyeballs to target object, type.

D

And so before you could do the target view types of multiple views specified. You need to have to create separate controllers. You have to create one generic controller that you then scope down based on whether or not the view is a particular type or you have to apply an interface to those types and then create your interface or create your controller scope down to that interface.

D

C

Question they he's like what is your approach, because in here we usually? What we do is that we create a controller preview. For example, if you're going to make a controller for a somebody, tell you we call it customer detail, view controller and then, if it's going to be for this view, customer this view controller and we have like really specific eye scopes. So we end up with a lot of controllers in general. So that's how you do it or you use another pattern. I try.

D

To make things as generic as possible, so that's something very specific, then yeah, okay, you're gonna, be you're gonna, be doing one controller per view and depending what it is that makes that makes sense. If it's something that you know you create a controller for one view, but then during a customer or client implementation, you change that view or you do a view variant.

D

Then your controller no longer works right. Those kind of runtime customizations I try to account for as well I try to make my controllers a generic as I, possibly can them, and then, if there's an act on a view that just shouldn't be there. So if I had you know, custom contact view, I can just pull that action out. On that view,.

C

Well, actually, what we do here is that we try to do like engineer, try to follow this soli design pattern, so one of the one of the principle is the interfaces. So, in the end, we we do the controller's by interface, because it's not about the type is about. If it's implement this interface, it needs this. So in that sense, is that even more like narrow down to like one specific functionality, if this type implements this interface, then the controller should run and show whatever it needs to.

D

Show and the the main components were really cool for that too, because they were a completely interface driven and it actually allowed to things like we.

C

D

With Dennis about the main components like last week,.

C

They did yes and because I wanted to create my open-source version of it, I say like please don't why please stop it. Yeah.

A

C

Are you doing? No? This is that, okay, maybe for south context, it might not work, but we do a lot of expiode type of trick, just XP or base. So in that sense we my I mean we want to create something that does we have some ideas, but I guess I will show that later so.

D

Awesome we'll wrap this up real, quick guys and if we want to talk with other things for sure yourself, let me just bring up talk about scope a little bit more and then just talk about the other type of view controllers. You can create so you'll see the actors disappeared, even though we're on a ListView leg into a client detail view it's not up here anymore, but it's in scope down to list views that are contact only so I see it here and I should see it over here.

D

So that is a regular view controller. There are two extensions you can do on top of that, so you can do a public.

D

Were you doing an object view controller?

D

Let's let you specify a view type in an object types if I wanted to do a list view based on contact. I can do that right here and now. I can just work with my controller, it's already pre scoped. For me, you can also do agent.

B

Where that's one thing to consider or it beware of that, if you want to use the designer to specify the actions, if you use the generic one, the object, you control of least um contact, you don't have possibility anymore to specify actions in in the designer, and it's not a limitation of that Express or XF. It's just a visual studio thing, so visual studio designer files don't work with generics yeah, so that gets.

D

Asked a lot so these are really useful, you're, absolutely right! These are really useful if you're doing non action controllers. So if you're trying to apply logic to other controllers, were you doing something that doesn't require an action? The knees are really useful. Well, that's absolutely bang-on! Yeah! You have to be aware that if you want to create actions you can, but you have to code them yourself. So.

A

Real quick, sorry to interrupt a so hey man is asking on the charge. How do you hide a simple action going to the model and using the hiding actions under the views or everything? So that's an approach, but you can also do it in code. You can actually and control and say, and they set up the active or they enable.

A

So how active is you if you want to hide it completely or enable if you want to like grayed out so they cannot disable it, so they can reduce it and just put a reason like I. Don't like this action to be active in this view? First, and that's it if that make sense so.

D

That's something that's something I've picked up over the years is I actually put the like this dot, name or just name which will give the controller name why it's active or disabled. That way, when I go run the Diagnostics to figure out why an action is enabled. It tells me the controller it's in versus whatever bogus text I decided to put in randomly nice, so I find that little bit easier in terms of debugging. If.

B

You're, if it, if your app is getting really really large, with complicated actions, I would or with multiple modules that can interact with each other, then I will. Would you skip of the controller with full name, so you across a controlled name, it's just a class name and doesn't inherit the namespace. So it's another tip yeah.

C

Actually, we do that one way that we use the full class name, because it will include the assembly and so on. So it's yes unique is like the full name of a person, so it is even better because you can located between assemblies. Yes, the main problem, if you have more than one that.

B

That's that that's the area you'll get if you're, if you're, using generic controllers.

B

D

The other, the other approach you can take is the target object criteria to enable and disable actions so because I'm currently basing this on contact I can do where some like first name equals John.

D

It has the either tree for at least one or true for all. You can pick a selection dependency types requires at least one thing to be selected or one or more. Let's take one more so I run this now.

D

So you'll see my actions currently enable because my first name is John I put.

D

Brother William, in that action becomes disabled automatically, which is kind of cool, and that's just built in from one of their from one of the DevExpress controllers. It just looks at that criteria evaluates against the selection and then enables or disables based on that selected items.

D

Is there anything I miss guys that pretty good.

C

A

That's nice and the question that I was having on the carries. If you use instead of enable active, it won't be grayed out like it's doing right now, I would be completely hided. You only.

G

A

D

What I really like about the actions is up there they're really receptive to changes on the fly. So, if I even keep this, let me keep this active. Well, let me put some code into the execute. I can just remove it once it's been clicked.

A

One thing that I learned from Dave is when you will name in the actions if you like in the idea, and then you put action before then when you go to the model, you have all your actions that you did on the top all the action from the express like following through. So that's really, nice tip it's a small one, but it makes a whole of a difference. Yeah.

D

Yes, so here you can see again disables because of that rule this is among John, effective test action just goes away its various. What.

B

There's one thing: I want to mention: Dave: can you go into the apps at config file and enable the Diagnostics Act.

B

And that that's the thing you should have always on in development mode.

B

Because sometimes it's it's it's hard to to figure out. Why and actually isn't active or you've been able or something like this I.

A

Notice that in the web version there is all my no space to read this. You have to copy this and put it in a notepad or something because they they they space to free. The initial most I.

B

Think she came comparison to the yeah.

A

D

Oddity I, actually I, really use these myself, but it's.

B

Great concentration, you can come to our F with it, so.

D

B

There it is yeah, let me take the force and now you can see the control is active force.

G

No mister ditching yeah.

B

Yeah there it is, and now there's the name now it is enabled and it's active through and if you click it and search again for night for it, there should be a reason into the item. Key one.

B

Now you have to execute the action cuz it right now. It's in able to in is very stable yeah, that that was the thing about yeah.

B

And dead, whatever is that is the is the reason why we say put in the name of.

B

The controller.

G

B

Yeah, that's cause. We called it simply action with up with us more.

B

But nevermind info is there.

D

To ask you that the child window are the basic Diagnostics. Okay, no.

B

It should be the child, we look right depending on where the control is defined.

C

Yeah, even if you're MEP, sometimes it still don't work.

E

Especially life, especially life.

B

And clothes because because it's not scripted I want.

A

To let everyone know that we have no preparation whatsoever, no agenda, so we just made team means before we start the community stand up and we use start sharing what we know. So it is sometimes he's going to happen. So we.

D

Actually, we created a like a little helper module. It's available, someone, the diadem, Express Help Center, where, if you're having an issue where something's not behaving properly, you can add this module in and you can actually turn off controllers, either all controllers all non demyx press controllers. You can check them on and off individually, and so you find that control that's being problematic and we've we've found that helpful. Oh.

A

Hey I have seen it several times. We had a a problem with an application with a lot of performance issues and I just was like. Where is this a lot of queries coming from I, don't know idea. Where is this? I deactivated all the controllers with your tool that I did not easily nice I found that actually on the next presenter I actually pinpoint the controller that it was giving me little fix later and good work, and that was a big help.

C

That's taking a lot of time, I think we should include that in the next meetup or maybe another video with with damage hunt that we use it remember, Harriet and I. Think it's really neat because for identify contours that are creating performance issues, it's amazing, you can just turn it off and you will know what it is. So it is.

D

Nice, that's something I do wish DevExpress would include, and in the base is the option to turn on that benchmarking so that you can see how long it takes for each controller to become activated or deactivated. I mean.

A

D

Would be that would be nice.

A

E

Think that that's a whole another topic in this yeah we can go we're.

C

Like especially, some going off topic like 40 minutes,.

E

B

Questions about your controllers and window controllers all.

A

Right, no actually Keith. Now he was the one who was the question that did stop it. He already grabbed and they wrote on the chat and he said thanks Dave, that's great. So that means that we actually stand. In my opinion, this was a really great display nation and with a great base, but because sometimes we are just talking- and maybe they are not seen- it they've actually tie them code and joy how's everything working so perfect, so they just stopped. Sharing I will come back to my screen and let's move over than me.

A

Okay, all right. The Hoshi I think that is your turn. My turn good, a wonderful little request that we have from the Facebook group. So if you are watching this later and you do find- you are not a still a member of the group- please join up. We love to have more people asking questions and we can discuss our any topic, and one of the thing that I want to point out is like we're, taking every request that we got on the Facebook group.

A

So that's a signal that if you have another question for next time, please put it we're going to definitely do our best to address it here. So one of the question was a: how do we channel or aim as a reservist and one of the solutions? There are a few. You can do a lot. You can do only CF, even if now for net core and net five is not going to move forward by a one of the solution is XP away, bi Soho. She would talk a little bit about that. Okay,.

C

So I guess you should make me the host, so I can start.

A

C

Done, okay, so let's see yeah and I'm going to share this screen, so okay I'm on Linux right now, so let's go to the luteal machine which is Windows and let's hide all of this and I will hide you guys so I, don't know where you are and I will put this in the corner. So, okay, basically we're like two months ago, three months ago, I guess we were having vacation time with Xavier and and well I, don't I guess most of you know that he and I were together in the same company with frameworks.

C

So we were talking like what do we do with all this stuff that we have all this code? It used to be like a proprietary product and we decided to open source as much as we can of our code base because sometimes just maintain some piece of code for just one or two customers. It's very time consuming, so it's better to be open source, so anyone can participate so well. Basically, we create a repository on github. Let's see if we have it here, I.

C

Do have a lot of repositories and more than I should have I guess, but in the end, what is the most important one? Is this one anything that will be open source will be part of this. So just to show you, we have a few xpo providers.

C

Maybe in office we have around 8, don't computer Express hold those are extended functionality for is there a special database like, for example, we have a customer in Dominican Republic, which they use IBM db2, but not the normal one they use for as400. So we have a special version for Esther hundred. We have for SAP HANA, also it's not covered by developer Express. In the end, since we were creating XPO providers, we decide to create web api, provided. Why?

C

Because we do a lot of summary in here in the office, so we do integrations with South application. Then we expose a little part of the application to somebody in forms, so we used to have Web Services and we used to have like Oh data web services and it's good for reading and it's like nice and it's easy.

C

But then, when you try to update or insert complex objects, it's like really difficult and it will break depending on the version of the data that you're using and so on, so on so on, so basically what's a nightmare. So what we decide is that, okay, if he's C sharp on the mobile Scion and C sharp on the silver side, why don't we just do like a transport layer in between so I'm going to do a demo, but first I well I wanted to show here we have the repository.

C

Is this is public you can just go in and clone it I actually encourage you to do that, and basically that's what I have in here open and let's go to providers. I created a presentation. I isn't here what happened all.

A

Right we had some help from you with a CI CD and a break yeah.

C

A

We'll listen! Your.

C

Your your the layout that you talk with Xavier in one of your meetings, so, let's see well.

E

Directly print props file yeah there exactly.

A

Now, a structure and the structure, the source, folder and everything behind that's really: nice, ok,.

C

So I will use the online copy of this. I still here see the demo, the demo, what yes so hold on just one sec.

C

Let's go here, let's go here again, what is maybe it's not here. You.

A

Have to marry with a matching okay, yeah.

C

Sometimes I don't know like: where is the window? He said inside of what oh, yes, so I mean inside of which completely because I have two computers working together for visualization, so one sec, just that probably should be here. I was preparing before okay so hold on one sec. It's going to PowerPoint again, if not I will do it with a live.

C

B

To be on your desktop, according today,.

C

I know but I deleted it, because I didn't want to have like several versions of it. So I thought: okay, let's that's it for yeah, okay! So let's keep this I will I will just like maybes here.

C

Yes, thanks, God of PowerPoint, okay. So basically, this is the layout.

C

What we have is like, we have a web server which it doesn't create an API. It I mean it does get a SP donut core API I mean you have the Bears like get poles and so on, but we're using just one birthday poles there, because you can send more data to that type of functions. So it's like quite simple. We have an implementation in here and we have like we can have like more than one database exposed by this service.

C

So in the end you put like as many connections as a thing as you want, and you just have to put an ID like Inc, for example in here DB 1, D, 2, D, 3, DB 5, and we should be do before, and then you expose it to the API. So it goes through HTTP or HTTPS like like with SSL, and then you can have any client in in general. This is somehow a red we have iPhones. Android phones, console projects, windows breaks in this.

C

You can include stuff, of course, in the windows place or web projects, and also you can run it on Linux or Mac OS. So basically, what it does is that in the client side, you're using XP- oh, but instead of connecting directly to the database, you are going to connect to or provider which is the web api provider. So basically what we do is we do we transport the operations to select operations? They modify operations to HTTP to the two here to the server side.

C

So basically the client doesn't have to have any reference to the database or it doesn't know which data series actually so why we do that HTTP well, I used to love like WCF I, think it's a really neat technology, I used to work a lot on it and when they launched it like when they release it from my company that I was working at that time, then they sent me to New York.

C

To take a course about Dahl, you see, you have to see how we will use it and it was really difficult and WCA Fisk I mean it's not complicated, but it's really broad. You have like a lot of network protocols that you can handle.

C

So in the end we decided to go to HTTP, because sometimes, if you do a mobile application, persons will go to a Starbucks cafe, for example, and maybe the router of the Starbucks cafe, will only allow HTTP or HTTPS communication if you're, using WCF and you're using tcp/ip, for example, if I don't go through because the router might not allow it. So the safest way is to do HTTP communication, but actually we will expand this provider to include WebSockets, for example, and maybe any other transfer layer that we want to include.

C

But so far it's CDP's. Well, it's good for us at the moment. So per.

B

Se as one more question on this to get some some, so you talked about a Web, API and and WCF and and all that kind of stuff the thing is, is if I could go for web api, for example, then I have like a public interests. It doesn't need to be public, but you have some kind of rest endpoint or something like this, where okay get customers indicator chase block back there and you have all that get those boots operations and with and with WCF, for example, I have complication for days.

B

Okay, let's talk XML and now, let's use net TCP and do all the communication stuff for for XP API. You need both sites at least need to talk, XP or.

C

Basically, in general, what we were transporting is the internal communications of XP. Oh so, okay.

A

Hey you are the host and we have I think that a few people on the waiting room, I.

C

Did to allow them just let me because.

A

I can not do it. I.

C

Got the whole tryna see participants yeah, only okay, so I guess is good. Two more persons should join.

B

C

B

You should share the same model in the in the client application.

C

In this case, actually we we don't even use the models in here in here we instantiate the data store without knowing which model is going to be connected to so I will show actually they the code, and you can see it because the repository is public, so you can just go and grab.

C

Hold on I need to put the new people in.

C

Okay, so basically that's the the layout and this run is actually so I can show it to you. So let me first close all these windows and let me make my machine full screen or maybe not because I don't know, I mean it's hidden back by the zoom menu.

C

Okay, so I will put this like in the corner, maybe okay! So basically, here we have the API provider.

C

We have the client and the server side. So here we have a demo. So let's check the demo. So we have an oem which I will use between all the this topsail. We will open source, so I will use that om to all the demonstrations, so is hitting the share folder. So here is the Web API demo. So let's check the server first, the Cerberus I really need for this server. I just did like right-click, add new project and I selected, donate core Web API type of project. I.

C

Don't want to show that because it will take time and I prefer to show more code in this case. So if we go to the startup class, we only add a few lines in here. So basically we we, we use a dependency injection.

C

Asp.Net core and we do is like weekly data store resolver. What is this is like with this service, you can expose more than one database depending on your ID. It will try to go to the configuration file and load the information, the connection string, if it's not there. So basically, this is the one. This component is the one who handles like hey I, get a request to connect to this data. Is the data is DV one or db2 or DV three?

C

So let's try to figure out from the connection string and after that you have some helpers for serialization and the communications in between. So basically, these three lines, which I will make an extension out of this, so you can do something like just our XP or a pi/2 the service. So after you have that, you only have to do. Like you add a new controller in these cases go to the controllers and we have this controller. So this really, he had it from XP or a VI controller base.

C

Then here is empty I just inherited from it. You can like have it completely clean, but I did create the override. So you can show like. Oh here is like the do command here is the get out to create options. Here is the modified data, so you can do something here in between if you want to alter that flow, but in generally, if you don't, you don't even have to create the overrides.

C

So, okay, that's what we have and let's show me, let me show you the settings. So in hitting the settings we have two sections. We have the connection yeah in a minute.

A

C

C

Okay, I think everyone is me yes, so basically, if the here you can put as many connection this thing as you want and also you can add them in from time. Maybe your service is already running and you need to add a new database, so you just go and add one and you have to put a unique ID in here as a name and also you have to do the same for the how to create options, because each database might have a different out to create option settings, so you can do database in the schema.

C

This is basically the name as the in the new object. So after that here we have like both of them are attached to memory provider to make they to make example more simple. So that's pretty much it so in general, to just go back and say what you need to do is like you create a asp.net core web api for a clean one. Then you just at the reference at these three lines, well six lines, and then you create a controller that usually head from XP over API controller base and everything else.

C

You don't need to override it. I just put it here to show that that's what it does and then that's it and let's go to the client side in the client side. Of course, you will add reference to decline in Prague. You will see in here the Web, API client and let's go to the program.

C

So here is really easy to use this controller, you only have to use one line register, so this will register the xpo provider, so you can use a different experiment that is not doesn't come out of the box with with all the developer stress component, then all of the providers, including SQL Server, Oracle MySQL.

C

They do have a static method, colgate connection string, where you can send some parameters about your connection and it will return the valid XPO connections thing, because XTO collection is thinner and it'll be different, especially because they have the part of the provider, so he'll I do get XP or Konex missing it happening for the URL, then for the endpoint I mean for the controller. Basically, so the controller is. This is name of the control that we are going to access.

C

Then, if you do need a token to secure your communication, if you want to create a JWT token also, we provide the functionality that you can login get a token and then make your connection string I'm not going to show that because it's the more complex scenario and then the ID. So this is going to connect to DD one and if you go to the server DB one is memories at the store and will be save on the file DB, 1 and XML.

C

So then, after you get the connection string, basically you can do excuse the fault, gate, connection provider, you pass the connection esteem and they also create options. And basically this will you are data store where you can. You need your data layer so I'm using here the XP or happen. So let's go and see what it does.

A

C

Well, I have this M I think so. Basically you will see this in all the examples of the Express, especially in the web, examples that they have a class to initialize the data layer and to create the dictionary and so on.

C

So this is basically boilerplate code and we will include this class actually in 104 nougats, so you don't have to write it all the time, but in here in the example, you can see how how how a reason why he's working so basically this is like utility to initialize the database if it doesn't exist like the updater and to return you need to force attach to that data layer. So this go back to the program. So in here, I have I initialize the data layer and then I create a new.

C

You need to work in the unit of work. I will use bogus. Have you done a video about this, which is something like really nicely need is to fake data is to create like records with valid data, so you can tell bogus, create full name, create a boolean property, create a phone number, so basically I'm I'm going to create like I, don't know how many like a hundred customers and then I will commit the transaction. So basically, the flow is like I'm going to connect to the Web API.

C

Then I'm, going to update my schema, get a session and with that session, I'm going to create the hundred customers with the bogus figure API and then I'm going to commit them to the server. So this is happening on the client side. The client side doesn't have any reference to any database or it will not connect to the database. It will connect to the API actually. So, basically that's so, let's just run it. So, let's come here.

C

Properties then we're going to do multiple, startup tricks and we're going to run the console and the server.

C

So also what I wanted to show you is here, since they we're going to connect to XML file, called DB one and it doesn't exist, and it will be updated by the server that file will show in here when it runs so I'm going to put a breakpoint here and just run this.

C

So this will open up the cell, but it's a common web api server and actually we'll see the controller. That is one of the built-in controllers. And then we will just start the console application and we'll start communicating with the server through three CDP.

C

Okay, so this is the forecast control that comes as a demo with with the server it's not all server is the Web API server. So in here we did, they get connection string and let me because this I don't need the Diagnostics. So this is the connection. This thing that you will get so the Xperia Pro Vidor is XP over API. Then you pass the URL I'm, not using token I'm using a controller. The controller is XP over API token is empty and I'm going to connect to the datastore with the ID DD one.

C

So after that it will initialize the data layer and everything that you need to do in XP or.

C

And then we will create a new. You need to work attach to that data. Layer I will create a hundred customers with the Babu's fakir API and we will commit them and you will see that as soon as I commit them. This file will be created here in the server side. So let's run it, and it's done so now.

C

This application, which didn't have any idea or knowledge of where is going to be connected, I mean you just have the URL it connect to the database in this case and in memory database and in created data and I can show you that, because if you go to the server part now you have this file the DV 1 file, so I'm going to stop so I can open this, so The Hunger customer that I create in the console application end up in this XML is here so I will format it so ctrl a ctrl K, ctrl F.

C

So here you see the hundred customers that I just creating the code in the console. Application are storing this XML file and, of course you can use SQL Server MySQL. Any data is that you can connect I just either with the in-memory provider, because it's easy to show for everyone. You don't have to have. Maybe you don't have a spirit cell but you'll use posters, so you don't have to date array. So here you have the schema, and then you have the actual data here.

C

So here the hundred costumers I connected and what I can show you is that in the client, I don't have any reference to.

C

System data, SQL, client or anything. So in this case, actually we are going to reuse this with you know and wear assembly that you cannot. You cannot pour the day the I database connection from other two to that, because it will be swallowed by the linker. So in this case it's really neat because you can use the same component to use oh, no and where assembly, because one of the main goals we have hidden the off with assembly as soon as we can so we have the connector it works on any XPO connector.

C

If you see the lines is really easy to implement.

A

Actually, today, Daily Express I put a blog post about controls that they have for when we write three. So that's going to be a usable for you know for you bleep ear and for another thing so that hey yeah.

C

That's really nice, so we're that's all aim, because we don't do like HTML or any type of way. Here we like web assembly, because because it's a sam'l is what we know so far. So as you can see like transport, your code from XP or from one place to the other, like in the collection, the database is really easy.

C

It's basically just this line, and then you have to have the right connections thing, so you can do it with two lines without changing anything on your application and we'll be connecting to our mode database and it will be talking through HTTP connection. So basically, that's everything for the for the demo, we'll get more demos here. Actually I just put the console one, because it's the easiest one to understand you can see the flow.

C

That is like a few lines, but we will have a demo with no platform, because we are like doing a big research for that, and also we will have, of course, somebody in forms, because everyone used that and actually we use it a lot in your pray. So the main goal when we created this component was to use XP on summoning forms. We started with WCF, but we work with the develop express team and there are so many stuff that are broken on the WCF client. For, for summary, we decide like hey.

C

This is just network communication. Let's do it crawler layer, let's don't use WCF, is faster to read around in this case and we didn't. We have been using this for array like two years or something it was not public before, but this public. Now everyone can use it at the moment.

C

There are not nougat packages for exactly this duration, but since Manuel was so kind and give us like some insight on how to be in the parade on how to use like variables, I will make a vegan how to compile it for your own version of XP or if you're, using you're 18, for example, I can show you how to change the version and you will compile, and you will end up with the newest that you need also.

C

We will publish some official Nuits with this and what was most important for us that we always talk about that with Manuel and also with Dennis in every email that we'll have with Dennis. He said that, whatever code that you're going to publish, you need to put also the unit test or the integration test. So for all of these, we do have like unit tests. So here we have the test rate. So far. These are end unit, but we might move to tasty soon, so it depends on Manuel. Basically, that's pretty much it.

C

If you have any questions about how to transfer the data, you can just let us know- and you can just clone this repository is. Let me show you the place again. So is here Jose my username, which is a Karim, then bit frameworks you can just clone it. This is in the master already I did it this morning, so you will get the PowerPoint. You will get these break also and all the unit tests so so far so good.

C

We want to create more in these tests to do more coverage so for source code source base and then or basically polish, they, the official nuit for this component, so that I will have to work in like what is left of the week and the weekend. But so far you can actually just clone the source and use it and that's pretty much it I will say how here I have we have one more person here and Xavier I hear you speaking in the other room, but I cannot hear you speaking I. Guess your own noodles.

C

A

I was a mute, so I couldn't not because I was typing.

C

A

Didn't want that to get on the video, so hey, can you make me the horse horses so I can.

C

A

We have 40 minutes and a few common questions that we have a found in a year developing south, so I think that we will take turns to answer them and if anybody have any other question, please put it on the cap.

B

On one quick question from my side that really looks awesome and I was I was thinking a completely different way how this works. But it's it's it's. It's really really cool to see it in action, artists, a little imitations for.

B

Example, request sizes and stuff like this or.

C

Well, we do like some handling of your data. We introduce compression if he's needed, and you can also skip it out that will be optional in this next version.

C

We use a post request, we you can commit like really complex or heavy transactions and then work, but we will do soon is that the same component will be able to use different versions of the HTTP client, because some HTTP clients work best, wait for example, where assembly that are not swallowed by the linker.

C

So what we give is the ability to change the HTTP client implementation inside so at the moment we're using the rest shark, but in some cases that might not be useful or good for performance, so you can change it with the normal HTTP client and any all of the other flavors that are of HTTP clients, because there are hundreds of them in internal. So we only have one implementation but is open.

C

You can create your own implementation, I guess we would make a video about that like create your own HTTP client inside of the component, and also we will create like at least a one for you know, because we're aiming a lot to no platform lately. So we want to create one that will work with wave assembly because we want to do web projects and we want to do it in the like using prism and using sam'l. Basically, so in the end, we would.

F

Have a different.

C

Implementation of the internal HTTP client, the component, will still be the same, and so far so good we've been using this for, like almost two years, with only like a few problems in one customer from Stockholm that he used for me, he use member permissions and that that case a lot of queries and that can like drone like. Basically it will be too much work for the HTTP requests to do it like fast.

C

That's why we want to create all the resinize, but that's the only case where sometimes once every six months, something happened for one minute, but beside that there is no other issues with the component. It's like really simple and you can use it a lot, especially to transport the stuff between between locations, especially if you're going to aim to mobile development with summary, and you want to stick with Xperia's your or the image or data layer. You can use this actually so.

A

We have a couple question on the chat about the Xperia, P, I and I will answer a few, but I will let you to answer the one so when we scan asp.net be used instead of those UCF what whole set. So it was actually a speedo net go away bi. So that's definitely! Yes. The other question is about authentication in security, so they experience in EE GWT talking. So it's.

C

A

You can actually configure that, so it's definitely secure and one question that I think that is a the most important is: how can we convince corporate consumers about an unrecognized, middleware architecture? So I think that my answer to that is open source. You can see exactly what is doing so there is nothing I didn't there is nothing that if you go there and you check the code and you see something that you believe, that is a security flaw. You can report it. Sorry, you can do a pull request. You can fix it.

A

You can do anything, so there is nothing that we can that we are hiding there. So if you have any concern whatsoever or your custom and have it, they can actually go and check the code.

C

And I'm going to expand on that question. Is that I mean that's? Why we make this open source because we got a lot of concerns about security from our customers? So in the end it's like well, that's too much it's just there.

C

Just get it see if it's secure for you, and even if you I mean if you run these through HTTP already, there will be no some security layer working, but you can override the method where you serialize the data unencrypted also so it can be, it can go through HTTPS and the data inside that is going from one point to the other can be encrypted with your own encryption key as you want. So if they break that is that they really want your data.

C

You need to hire them for security by sourcing your company, but in the end that is like really not likely to happen.

C

You can never say never, but of course it will be like really like really small possibility that something will happen and you can add any other features like we do as compression. So the request from the client might be like I. Don't know, let's say like 300 kilobytes, but we compress it and it end up to be like 10 kilobytes.

C

So if you're going to mobile, like if you're going to use this in mobile, where you have caps or limitations on the bandwidth, this is to clean it because it will save it will save you a lot of bandwidth actually.

A

And for more like, we have hang HP or light a stool provider, so you are encrypted, so you are saving your app your data directly in creator and your mobile. So if someone takes your your application and pull it out and try to get your data, it's actually encrypted. So yes.

C

If you have all.

F

The choices you.

A

Have all the choices, if you need to do, if you care about security, you can.

C

Have like security in all levels you can have like in the HTTP level, like the SL SSL certificate, you can keep your own data inside and then you can store it because we have a SQLite provider, at least in cater that the data is in your mobile phone or whatever you're using device.

C

It will be also encrypted and not visible for anyone else so also about Xavier about the security is like we do implement the standard functionality for asp.net core API controllers. There is an authentic 8 attribute and also we have a login component that you can just go process your username and password and get a token, and you can include that token. In the connection this thing I mean that's I would say that that's the most common. It's an idea, but I wanted to do a really simple scenario for this demonstration.

C

I guess I will do a video with all the use cases, but yes, it's supported and if I will say this, it's really secure great.

A

So we have 30 more minutes, so let's try to make them also valid. We have a lot of a questions here. Most of them are just say, simple questions or just like question that we get now and then, for example, people that have never used us. They are with us like. Why should I use of should I start a project with just today or it's.

C

A

Staff is going to be a scalable how's, the performance in South. How are you I customization, because they only give me this set of UI. So let's go one by one I'm. A few of thing are the same ones. Just like it's clear that our life when I say what is they all get a space issue, a unit of work or what is the purpose of the ocular space inside of you? So they are kind of the same question, but it shows we have got these questions quite a lot.

A

So I think that it would be good for Dave Manuel Jose used to give their their experience when they are approaching with any of this one. So the first one is simple: July.

B

A

Project will Saturday.

B

Should be to a quick one, everyone does one question with like one yeah.

A

That we can do definitely.

E

The first, the first one is easy. Yes, yes, Darcy. How.

C

Do you say yes in in.

E

The war or absolutely it's like definitely yeah, so.

A

I will say.

E

D

A

Found a product that I have work on that I, don't include stuff in some way or another one, even if my UI is completely no-self I do the backend and stuff. Even if something, if there is no sound, related I would do a han min-koo on stuff I will do it based on salsa in some way or another one I always use up. There is no way that I can note that I don't know suffering any of my projects. So yes, definitely.

A

This is a great time to be a staff developer, especially with blazer coming up with blazer on Linux with donut that is now running everywhere, and so definitely just just yes. So I already talked about this for starting in South one of the way the great videos is the day for Hank getting a started with South. This is a nice video to watch it through from beginning to I'm. Actually, in the end, it gets a little more complex doing things with a with a with a may I.

A

Don't even remember nested template or something like that. They did it nice, a demonstration there and really in the support ticket is a really great tool. I would always say get involved in the community. I cannot say that enough. If you get involved in the communities, Facebook Twitter Linkedin, do you get to ask question and there is never a stupid question. We always we all well beginning at some point. So if you get involved, you learn a lot about that and that's my question. It wasn't gonna, it wasn't. One sentence by Mike: go for this.

E

So number three, the phrase.

B

Is a hard one yeah, it depends. What about scalability? The scalability isn't something special about Excel, it's it's! It's application has to come some kind of scaling measure how much users to have how much resources and the databases. How much concurrent users do you need and, of course, what what what kind of architecture choose and all have pros and cons the drawbacks and them and and opportunities.

B

The one thing I need to say about scalability, with every new dotnet version and with every technology it changed. I cannot containerization doctor staffing, like things like that. Every application can scale.

B

If you do it in the right level, for example, for with forms application, you can scale one thousands or ten thousands of users if you, if, if you put the right amount of work into it, for it a normal way one, it is harder because asp.net, the old piece people that is much harder to scale, but now with blazer and wade, Web, API and all those kind of stuff it gets more easier and manageable and approachable. So there's no silver bullet and there's nothing special about X F in scale and.

D

I thinking the x AF web, the classic asp.net I mean because it's state law rather than stateless. It was to date kind of the hardest to scale. Things like the a jogger Redis can't I think help with that significantly. Yes,.

B

Yeah definitely, but it's this all the same. It's like it's, it's more like architecture that helps with scale, not the technology behind it. So it's not nothing special about excel from Hale, actually.

C

Towards something here is that all the limitations that or most of the limitations that you will have in south or xaf I, don't know how you call it in your normal language. We call itself. Actually he are related to dotnet no to stuff itself, especially in web projects. The limitation is a limitation of web forms, the limitation on suffrage.

B

It's a session, sighs OH, so.

C

Basically, when people ask me is like I will not do stuff because of the limitations, you will have excited the same limits in web forms. So turning away for anything and that's.

F

C

Thing about blazer, so yes, that does anything about blazer that you can scale like vertically, not horizontally, because we do have a case in El Salvador, where they use the IAS forest type of the elk. So you can scale or it's on telly, but that also is not related at all. We use the same code in the South. Application is about the infrastructure that they set up according the database server and also the IAS layout. But again it's not related to south is something that is dotnet is how the network's actually so today, just.

A

Quickly quickly, one thing that I think that might get confused, sometimes because if we read the support ticket a lot of time when we're talking about stability, a scalability they ticket say because the way stuff was the sign because the way stuff was cold, we are not able to to scale to and I think that that is a lot of time. Confused people and even I got confused a lot of time because at the end, sap is a regular stuff.

A

Asp.Net web form is a regular stuff, WinForms application, so they say issues that you're having there. You will have a here, it's not stuff directly. So that's was just my my two cents. Okay, what about performance I think.

B

You can turn it the same. It's the same idea is it? Is it? Is it simple? Does it only want things or it is it configurable and all the kind of stuff, the more you do, the less performant an application could get, or it depends how you name performance, what you call them. They say that.

C

That that's a really broad topic, but if I want to put my two cents in there is that in general, I will say that performance is really good. It's almost the same as a de edad net or a do donuts as you can call it.

C

Basically, they the main problem with the four months is that xpo easy to use and it provides lazy loading. So you can go through all the property trees and note all data is. If you want to just get one value from the settings, you go like customer profile role, settings and then you're loading, basically all the related objects. So in general what is the best about? Xpo is the feature that gets more abuse, especially if you are a beginner that is like I mean the customer.

C

How do I get to this property like ten entities away? You just go dot, dot, dot, dot, something and you will get it but you'll, you think, always easy, but you didn't go from throwing A to point C in the end you went through all of them in between so you load, basically, half your schema. So, regarding performance, I will say that performance is really good.

C

If you know how to avoid the problems that lazy loading will will have, and those problems will be also attached to entity framework if you're doing into the framework- and you are abusing the the lazy loading again, your performance will be low. So it's about understanding. Why is the performance I think.

A

That there is a problem there, every ORM has is not.

C

Paying well, we have the.

A

N plus one problem that you're gonna load all orders of this invoice of this customer just to get one property so he's depending on how you design your application is not a soft problem is about yourself. Are you doing the code and believe me, if you have to do if you have to think how I'm going to load all these data from the database by hand you have to do SQL connection, you have to do all on it.

A

You willing to go so mad Dorian boys or think you will think twice, because you will have to do a lot of more code, but because it's so easy people get. Yes, hey want.

C

To do a if you have to do a quill yourselves to load related data, you will think it twice, but if you can do dot dot, dot, customer cat, AOA dot name, you will do it because it's so easy and then it's worth the performance problem. You start basically by.

A

By one thing that it gets overlooked is, like staff offers a lot of him from a lot of solutions to that stuff. That abuse are sounds like you only bring in the data that you need. You don't have to bring all the related or get all the things you have delay. Delay attribute to not bring anything more. That's.

C

Great one thing that I will say happier and we get this question a lot and I mean a lot every day. It's like, since a free saving you so much time, creating your UI and everything that takes an awful amount of time just create models and see how they load I'm, thinking a little bit more about performance in the beginning, design, your OEM tested, and if it but tested not with ten records, it will always be fine. With ten records, I mean you have your created.

C

A video about bogus, which is the data mocking API, put a hundred thousand I mean make sure it got in the size of your business according the size of your organization and then tweak it for that food. Why.

A

Do you want one thing that I have on my notes? Is after blazer gets a little more stable and with a little more models, I would put it on a shirt and I would do load. Balancing I will create one hundred thousand concurrent users and I will give you a song song song test after research.

C

Well also, the small announcement here we do have a load balancer component in its open source is there we didn't saw it in this video, but you can do like a single write, multiple read or read the first one that is available so I guess we will show that in other video, but it's very isn't that source that I show you Thanks I, would say I in terms of.

D

Performance for me, the two biggest pieces are Kara attached on and carry the of your application get in those really big fields. Those kind of unlimited data feel the big data blobs into a separate table that aren't accessed all the time would be kind of number one, because now you're trying to query a table that is 20 gigs. It just takes a long to get through it. The other piece is calculated fields.

D

So every time you do a calculated field, it does a separate query out every single record and if you're touching one of those big those big tables in particular, which we just went through ourselves.

D

You know the database lags in terms of returning that result, but then you're you're sitting there waiting for the result based on what's coming across the wire as well. So we we separated those out. We got rid of the calculated fields and persisted instead, and we took you know a minute to load a view down to two seconds where it should be right: yeah, I. Actually, here's.

C

Like hidden day in the meeting, widow sees one of our customers from Argentina Herman and he he use a lot of calculate fields. So pretty nice input day on what you said, because I try to avoid them in.

A

Nice area and use.

C

A

They are calculated field that looks a whole collection, so I have invoice on it. We load all the orders or something just to get it one doesn't that's definitely gonna have affect performance. I.

B

I think effect is that that's that's the whole idea about this, as is normally called. It's like a command query responsibility principle, we're okay for a simple stuff: it doesn't matter if you, if you do some calculated fields on the fly, but for complex, more complex stuff or for lots of records.

B

It's it's a great idea to catch the value it if it's absolutely crucial that you get it on point in time. So it's like eventual absolutely or atomic consistency. At the read level, you are doomed, at least with with normal technologies or with normal sequel storage kind of stuff. But if you are okay calculate some data, it doesn't need to be accurate in the second time frame.

B

It's in a minute time frame to a background process calculate the stuff put it back into the storage, read it flat from there and, of course, for smaller things or for small projects that this whole architecture thing is like this whole gray, whole scale of how much effort is worth the performance cost. It's the same thing about the scalability I. Guess no.

A

Absolutely- and there are a lot of things that we can do like, for example, for dashboards.

A

Sometimes you want to load all the orders from all the customers from all the things look and he loads too many things like a work order, all the labor, all the parcel things like I think that when you get at that point that you have to join seven tables, we can do a view on the database and users give that beauty dashboard. It will improve performance greatly and a not even that even actual has a replication.

A

Valiree's yeah do a replication of your data, and then you do the reports not on your batteries that you're using but in the oil one. So it's all depending on how much tying or how much effort do you wanna put, but you can make applications really performant I.

B

Think that the thing is there is no Holy Grail not and an excess provide some strategies about this. But there is no way to go to get to measure.

C

There is no magic formula for each case. You have to understand your design, I mean your om design, your class design and then click.

B

C

Then you need to know where are going to be the pressure points on it and just work with them isolated. This thing like okay I, want to know this as fast as I can usually it's reporting the place. Would you do that and.

A

I have seen a few obligations that I have had that the customer is yeah, but I want all my my my in case that I want to do a column Shushan instead of I want to do something like that is like how often you do do you do that? If you really, if you want really fast and you don't really use that that often just drop it just load anything you need and that's it.

A

But if you want to have all your data on there just for in case, if you want to suffer a little bit, so you have to do that trade-off. It's up to you and.

B

That's that's a really really really nice point. You made there because I had almost all the time, a discussion with with clients, not customers, I, like okay and and and how to attract columns in there that you missed in the report, because he didn't tell us the right kind of data. He was looking at it's like. Okay, I am so used to xaf, dragging stuff in and and then complaining about performance.

B

But those are power, users, a you, stick the X there, the grid system with all the stuff, to an extent you can't imagine, and then once in a while, they say. Oh, it's ended and now it's slow yeah. That's that some! Sometimes we it's better to get a user a little bit out of the coma of the complexity of software, design, of a two-piece design and just say: okay, no, until the shoot no.

A

I will take if I have to if I have to do it like a cone of I, say yes right, let's say something that I, don't, like our sake say: yes, I do like it, it's just. It's like it's over functionality, so if they use a more functionality that they need, so they expect you support more that they actually need. So if this action about reset view settings is here, then you have to support the writing. You don't.

C

Even use my documentation, you.

A

Don't need that you don't use that we are most of the time hiding functionality instead of our individuality.

B

That that's that sound, sometimes a problem, and they, if I I, have no idea how you were thinking about this, sometimes I think they put too much stuff under standard modules. I.

C

Mean we get the question about save, save and close all the time mm-hmm.

D

Yeah we get the reset, there's reset view settings which we often move like the tools tab instead just to get it out of the way, because people people wanted to be more simplistic because it is too MA is too powerful. Sometimes you gotta turn stuff off and you you feel bad doing it, but it is what it is. Yeah.

A

But you will have fun with a happy customer if you hide things and when they've requested you give it to them. That is the other way around. If you give the too much and they are overwhelmed and they don't know how to do it, no working right, I, don't have documentation giorno supporting me. So it's.

B

A

Go the other way around.

B

People we should we should brainstorm, sometimes to do a normalised module that cuts out all the functionality of xef and put it to a bare minimum. Every.

A

F

People, customers.

B

It's like normalized ESS, like with the with the browser things, so they reset everything so that everything behaves the same like Lotus motor. If you just kept to simply sticks thing of xaf for some customers, I think that would be a great start to get some confusion about that out of the way. But we wake up today.

A

Forward we have a cover, question I, don't know if we're gonna have time to go over all of them here today is know. We can come back to them on the next one. But okay, one thing that again just dues, those debuts for you. It generates the view basically on your business wave model. So what about the UI customization I wonder the way a cake, yeah, really a specific UI. You.

B

Can do whatever you want on every platform there is one exception is blazer for now, but that's okay, cuz it's in development or in heavy development. Right now you can change every aspect of the UI I didn't come across some kind of your eye. Customization I couldn't sometimes it's not your eye, customization per se from Jewish of aspect. Sometimes it's behavioral, and that came it's a little bit into this idea of this normalized exact thing because sometimes stop cake interfere in the UI.

B

The only thing that is a little bit hard to, if you know, death, Express and know the designers and all kind of test stuff.

B

Sometimes it's you need more to drop into a controller code and know more of the specifics that are good, implemented in the in the normal WinForms designer stuff that you normally would would use like. We've tracked drop a button and show it written something like this, but you can do everything there is there's not no limitations. I think you can.

D

It doesn't even enter you want to cut into it.

C

D

G

Of course, when.

C

They asked me that question is I, tell them well, the limitation is time and budget I can.

B

C

As much time doing the UI exactly a few on, if you want everything to be black and white, with cuts showing out of the text box, I will do it for you, but it doesn't come out of the box. You will I mean. That is something that you will our time and money basically to the product, because they main reason for me to yourself, because I'm us I consider myself a back-end programmer. I, not I'm, not related to UI. At all, I mean you should see my UI say our offer and my powerpoints for that.

C

You should have yeah he's good with it with Matt.

A

My example series take a look at this. This is just say, like a point of cells, you have your categories, your pills, you can click on it and it can be kind of tossing a Windows tablet because it's window space and you click on it- I send it to your like to you know, then you can scan the barcode, you can delete it, so you have it so you can type the price and everything. So it definitely goes to my soul that I.

B

Never I never saw such such a great touch. Experience you I yeah,.

A

We did I did I. Did it also.

B

A

Me see if I can hide this.

B

I'm not very good at mobile touch. This.

A

Is a Windows tablet and you know that the Windows Phone has this enable touch mode UI that it makes bigger the controls. So we use that and we make like a point of saying that you have the categories that you can select, for example baked goods beverage, and then you can clean a click. You see now it's smaller, because we do the enable and actually I use for that one. The yama-chan phone size controllers, so I can improve it greater font size and then you can add it to your car and then you can pay.

A

So if I assume is exactly time and budget, if you have time for it, let me know what you want to do: will get it. What should I put the cuts? Exactly so hey.

B

A

Question and all these four are the same one. It's like okay,.

B

I'll get a space.

A

Station unit of world organic space with have you when.

C

A

Use Asian went to each organ space, nested I'll, get a space and through Aguilar space, so.

B

Lots lots questions, simple answer: all of them are supposed to do to that. The data access for the database, if you have one or non persistent object space, is it like there's a big mix night match, but the thing is, let me roll up from the back unit of work is a unit of work, object, xpo that tracks transactions and changes of objects session is basically the same thing without tracking the changes automatically and an object phase is the XF implementation that abstracts away XP, oh and the session and unit of work concept.

B

So you have an object space and you have an ex pay up check space or XP object space that works under the hood with sessions and human talk works. There's also an EF object space if you're working with entity framework, for example, it's.

D

Important to know that I mean when the next day I first came out. There was no I object space. It was just object: space, yes, I directly to XP Oh, using sessions or units of work session being the base class of unit of work and then when they tried to put in the entity for when they dip it in the entity framework implementation. On top of that, that's when they poured into an interface and I think the objects base layer is designed to to work with more of the UI elements. So when are things modified?

D

When do we enable and disable actions based on things being committed or modified at that point? So that's really the it is the the kind of wrapper around the underlining data layer, but it also has a bit of functionality in terms of driving the application as well. Yes, so.

B

Eight, when to use the session and when to use, object, space always true the object space is color coded, it is or M.

B

Agnostic, so if you lay the one to decide for what crazy reason whatever to choose entity framework or your own or different or mapper, you are not likely to change. Your business code went to you session or unit of work. If you really really need special features, that xpo provides so.

D

That's that's something like doing a large data. Import works a little bit better for using the session the unit of work, because you know I you're not constantly hitting the UI end.

B

Or you need to grabbing some kind of cuts in to inside, takes the old layers like, for example, all the dirty stuff Jose did with, with with the dated layer, saw we put six PYP iodine. You need to work with that, but for the normal crop application, a business logic go for object, base.

D

Do you guys agree use any framework in any of your applications with xaf I.

B

Experimented and I never did it product hmm or it never left the most artists. For me, but I, know acacia greed, for example. She is using entity framework really successfully.

B

So what pick your poison, if you are experienced with XP? Oh okay, with the experiment, already have a lot of data models with entity framework. You can use entity framework and you can choose both of them. You can you say in the same application. I.

D

Always tell people to use XP Oh master in any framework guru yeah when they come back for help with energy framework, I kind of go.

D

B

Point of view as well: yes, actually.

C

We do the same here in the office and it's like unless you really know what you're doing in the framework you I mean if you know how you're an expert you know, everything about the ins and outs of in the framework go for entity framework. But if you don't know, if you have only don't like the end, it is save and load forget about it. They stick with XP or because in actually in my case the most are most experienced with XP or I will say, and also just to finish.

C

This idea about this for questions is like to avoid that mismatch between using sessions are the entity level and use X IMG space in the controllers level. They are. They do have an interface that you can implement in your persistent objects that they will inject the object space inside of the of the object when it's loaded. So when you're in the context of the object, you can use the object space actually, so it's good because in that sense you will like normalize your data access to use, object space all the time. It's not that common.

C

Most people don't use it like that, and especially it seems, for example, daemon, rail and I come from long time ago, with South we're just used to it. We don't use those type of tricks, but if you're a new person going to South, maybe that will make more sense for you, even even.

A

Myself, Lange, newer and just like from 2014 and and just a baby on this, hey I have never got to production again to the finger I have done. Prototype I have tried to eat. It doesn't make sense for me, like the customer has to be like again like a entity framework really passionate person to actually see a benefit of getting into the entity Franco part because xpo it gets so much like it's out of the box. You say everything you want is right. There again different were a lot of times.

A

You have to go and look like what is the workaround for this specific tax that is working out of the box, Oh Lara, if you were doing those old IRA before that's Explorer of the Box XP or half the the model designer. So it's it's a good choice that there Express have died for who needed, but I. Don't think that is there a piece class citizens III.

B

Did added bomb project concept of there was some some advanced all the other stuff. I did really with a customer together and we needed really customizable Web API stuff, where, with with really crazy security stuff it like this, and we decided to remap the same database which, with a 30 framework, and then we used any different work in combination with xef a testing tool to see what kind of data is coming out and in of the system based on the security rules they needed to implement.

B

So what I use it for a normal business line of application, probably not not a long term goal, but as application rules and as I say, picture poison. It whatever makes you happy XP, always long around and it's really well tested and everything has its pros and cons. So.

A

Right before we move forward, I want to ask a question: I, don't really enjoying the session. I do love this a lot, but we have been two hours. We can continue on finish all the questions we can leave it for the next session. Up to you, I'm happy with both a choices.

A

Actually I have two beers I'm happy and can't keep talking for one more hour, but again, I don't want to make this too long for anybody who has to come back to work. I.

B

A

I think that we can finish all the question that we have in half an hour. Let's.

B

B

Quick answer: okay,.

C

So I will take the next. The next question is that, where should I put my business logic? Okay, if you're going to do small business, doing like calculations like you need per quantity, just do it in the XPO level, if you're going to do more complex stuff, try to do like what you will do with the main components that you will have like customer customer logic or customer helper, where you have all the operations for the helper for the customer, because that will make your class like more clean the XP.

C

Your class you'll all only contain the gate and set of the representation of the object, so she'll not include as many mitosis you will want. You can use extension metals. Also, if you, if you like extinction, methods instead of hemp else, but I will prefer to put it in a separate class. Instead, unless is something like unique price or quantity, which is the most simple case that you will do a multiplication and also, if you do it that way, it would be easier to unit test your your logic.

C

So lately we been like really really deep into unit testing. Like because it looks like more work at the beginning, but it really pays in the end every time that you release you're, really sure that your system will work because you don't order any test, and something is broken is something that you didn't test. You are the tested for the next time.

C

You have more coverage in the end, so I will say that I prefer, like a small logic like multiplications, XP or level, then otherwise, I will create a separate class with the logic or like a helper or extension for for that entity. I know Monday's, so.

A

We're gonna get to testing because that's one of the last question that I have only there for Manuel but a questions like when we say what would work will it should put the booster story. We have the controller, that's a place that we can put the business logic. We have the unchanged it. So when something change we can do some business, do it. We have they said so and for example, we have the action attribute that we can do an action. Try it on your business.

C

A

Know but I have work and products that, when I get to the project when I started using working on the product, every action was on the business story. So we spend a lot of time just hiding the action because it was showing everywhere and we deny everywhere so instead of doing a view controller, they put it on the business story and then they object, and we have to hide it a big word because it was showing in all the view. So again is this action that yes I, don't do. It is their own changes.

A

If the view controller is decided, what should I put it anyway?.

F

D

You say it's: it's not listed it's bad as best best practice from DevExpress I. Typically, if it's simple changes, I'm putting things into the centers as long as you're putting that check for it's not loading, it's not saving I, put very simple things in there, because it's it's very readable. You can see. What's going on what I do see a lot of is the on changed method. Getting called and people dumping a ton of logic in there and that ends up causing more confusion than it causes.

D

Then it does good in a lot of cases, I'd be interested in knowing what you guys do for scenarios where maybe you're trying to pick a client first and then you have a contact underneath and that contact has a data source property attribute tied to it to say only pick, contacts that are billed that customer. Oh.

B

A

For it, that's.

B

A great question: if I understood it correctly, so it depends on your kind of application. If you have some kind of a parent-child relationship like in this kind of thing, where say: okay, let's display a list of children, that's filtered to some kind of property to the parent, the filtering isn't, but the bad part. The bad part is rather like when and need to change my parent, depending on some kind of criteria, and there I found the patterns that work.

B

For me, the best is like client calling the parent, so it's like notifying about both some change that were made to an aggregate collection and something like this and then doing this logic on the kind of tree structure or aggregate. If you call it.

D

Are you putting validation in place, then I'm on the parent object or on that object to say? Is it heard of that where's? This contact.

B

Normally I think this is more like a visit or approach kind of thing where, but but basically all the kind of validation logic is like that. The logic itself sits somewhere, I don't care, but but the thing is triggering the validations to child object and then telling the parents hey. Something is wrong, or everything is right with me and then the parent is aggregating all the changes, so that's I think an approach that really works for me in a lot of parent-child scenario: kind of things without having all kinds of crazy ways.

C

So it would be, it would be like like a push approach instead of cooling yeah.

B

You know asking.

C

Is always telling.

B

They say like the horrible principal Solomon: yes, parent is like the parent is like okay, I get called from the client. If something has changed rather than the parents and.

C

I defined a guide.

F

B

Asking yeah, but but ultimately the the thing that is doing the final check, like some kind of setting a boolean with a rule for good property value, for example, is sitting on the parent and then I call a parent on on property change. So the UI gets informed about the.

D

Right kind of structure I feel like there's a opportunity to provide a controller that looks for those data source problem.

B

I wrote one of these, but it can get a predict for the normal 99 or 90 percent cases.

B

It's rather easy to write, but it's like a diamond star problem where you have like, if you like, two validation rules, for example, that needs to match certain criteria. That's based on additional properties. Let's get really QQ concern. Whoop.

B

The thing is, I think there is an opportunity to to make this easier boys. That's.

A

A great thing that I love that I like about a this type of medium, because from here a lot of ideas come up, so we can do a base model with hiding everything that is over functional. We can do some other controller that take care of this and so on. So on yeah.

C

And you know how, here that the communication master detail is always something that, when I well, you know that we usually one of the.

C

Stream of income is like we do a lot of training and we have trained I, don't know like 50 60 companies in Latin, America and then Europe and so on. So I always get the question like Jose. Can you show like how you calculate the total Don, the master based on the detail, yeah yeah, although.

E

C

Don't want that question I, don't want to show that code because it could get really messy and it's like.

E

C

Above your profit,.

E

C

Yeah I mean but I get that question a lot like how you calculate like totals in the master based on the detail, so I guess I guess we will have to put just one meetup to.

E

Do that this is the way you should calculate it. There's one thing: I.

B

Want to add about this question because it's it's telling it can be kind of calling with business logic and I really hate this term, because business logic can be anything because that is when I hear people about talking about business logic. Oftenly made like here, okay, and how is my body communicating with this and what's their thoughts? The business logic for me in in the end is really really that kind of logic that makes your if you have some kind of a financial application, for example the tax calculation, stuff and stuff like this.

B

If you have such a huge amount of business logic that you had multiple kind of calculations based on other properties and based on their their based on that and stuff like this I, don't think there is any place you can put these inside and XPO object or and controller stuff like this. This those are really the main models. Those are really really hardcore, calculative stuff and those shouldn't be in the data layer or data XP or Millea at all. Iii.

C

Similar that the best way to see it is that if you ever use domain components, there is really clear, because you have the persistence, you have the definition of the object, just like an interface. Well, you only have the get onset and that's it. And then you have a separate class for the logic, but I like it. That way in I did a lot of breaks using like domain components, personal products, of course, but all of them went in production.

C

But in the end the main problem of that is that you end up having like a lot of files like shut up like a customer customer logic. Customer logic like extended logic and I mean it will.

E

C

A problem depending on how much you use it so.

B

The thing the thing is, for example, if I say, for example, the tax calculation stuff kind of stuff and that we now we can use XTO on the on the client side of line devices and voice and the wesam and blazer and all the kind of stuff it's getting easier, because it's it's more back to the normal kind of stuff.

B

We we used to do it, but business logic is everything that makes you replicate, work as a whole or at least preach prophet, except for usability kind of stuff, which also you where to put the calculation logic. If you will so, and it depends I.

C

Will actually do it? I will put it in these sentences, like I will put it in that class and I can instance it easily. So I can unit tested later. Yes, because.

F

C

You ask me like why do I put it in the controller? To put it in the controller in the handler of the actual will be exactly the same. I put it in a windows form in the handle of the button, then you need.

F

C

In the boot, or they form to create your business logic, so put it in a place where you can instantiate it easily, so you can unit test. That's for that.

F

We thank you last.

C

Answer because, if not, you will depend on instance, a the different objects that might be hard for you to do in unit test in the scenarios, and then it will be you then you say like I will not test it. Then you will get their own calculations when someone press processing voice and then is a lot of other chains of stuff, so I would say like try to do it like in the most simplistic way, what you can insensate it and attach the customer or whatever object it is, so you can unit test it.

C

Basically, that's I will say that my answer I.

B

Think, that's that's exactly the thing I think if it's easy and it stays easy, it should be easy if you, if it's get more complicated refactor it out. If you use it a lot refactor it out, make it more modular. It's normal software development and the place the the business logic move so that around application will ever venture regrow in one or the other. It depends how you use it distinction metals, if you want I, mean.

C

A

Wish people I will I wish I something yes to everyone who is listening to us and they are a beginner or something. I will definitely commend testing for sure I have not working a company that I have post testing that they were doing. The I have not I have not done a project that I have not been the one pushing testing most of the company or project that I have working. There has been not in testing whatsoever, so don't get scared.

A

It's just like take it as an advice to start doing it because it's really paid is really about. Regression is really avoids a lot of a issues later on, but most of the company of perks that I have work on. There is non testing whatsoever and we get to that to the test. This question and the man wife will a expand, not bad, and not only that he will talk a little bit about tasty. It is funny to see that the sole the Sun here is really hard. I mean well a.

B

A

Look like the Sun lady look like they start going down. There.

B

There's my screen behind my back is a window or not the only window because there's all kind of crazy stuff going on I. It looks like, but it's just a lamp up there and.

C

Right now, I'm a city system, fatty sauna, but I usually live in Russia. Okay,.

F

C

2 a.m. in the morning and is there you can see at midnight in the summer you can see high all the time every day, every every moment of the day. Is they yeah.

A

They've I, don't know if you know Jose, he was visiting here for just a few days and they Co VB came and he wasn't able to live. He cannot get to Russia. He cannot come back to Salvador. He cannot go anyway. So.

G

He says talk here.

A

B

In Austria, at least so.

A

I will answer the next two questions because they are pretty simple, so theyíve already expand greatly on windows. Contrary view controller, so the controller lifecycle you can see. So if you control that you are doing AB, you then work the very happens every time that you open the view they only activate when you close that view etc. I'd said that so there is some home abuse control created. That is when the view is getting created. So that doesn't happen for the windows control.

A

The windows controller is going to be apply for the a1 surveillance will happen when you open the application to the main window, or so that's pretty much a few difference. What do you wanna run and days already spun on that a lot, so I won't get more in deep on that, but I just wanted to clarify that. So one thing that it comes, a lot is like when you want to do an agnostic message, box and little message for Windows and web.

A

So in Windows is very simple extra message: box dojo and you show your message in web: do you have to do some type of a alert or some type of? But there is not a something like the message book so right now we have the jovial strategies so message that I give you a toast or something like that, but a lot of times a really nice solution is just create a non persistent class that it will give you a detailed view, and then you show your message. Trailer.

A

So I think that that would be if I have to say what will be my agnostic version of Windows and web message, dialog or whatever it would be. Let's do a non persistent class, let's put what we want there like a message: property that we can add some text there, and then we do that for window and web and good to know. That's.

B

Basically, my dialogues module in main sentian. It's it's, no persistent object, label, control and show view in pop-up window and you're done nice.

D

Like let me circle back to the controller life cycle for one second, because I think something really important that gets missed a lot. Is people not unsubscribing some things properly and not.

C

D

Actually I did a video on this, where I actually inspected the memory and I sent it to Dennis and the xaf team to look at and they came back and said, don't publish that only because the way that I portrayed it was. It looked like an excess specific problem, but in reality it's a dotnet problem right. It happened, but all I can tell people is make sure if you subscribe to something, especially if it's a global item, like the application make sure you.

B

There's a neat thing right there, because the thing knocks at it with like the reactive modules and all of that stuff. They gave you a beckon, a disposable and if you don't miss those there's an analyzer that they tell to hate, you didn't dispose this instance, which don't happen with event.

B

Handlers and that's I, think a shame that the development team didn't do a lot of work into events lately to write some analyzers that prevent that happening, but probably that's something we should do it as a community as well resharper does it, for example, I, guess or day there was some analyzer that says. Oh you didn't subscribe from this event. I.

A

B

Say there are a I.

A

Would have to say, I do enjoy, I will do like a lot. The reactive programming model I think that is.

B

The word exactly.

A

Exactly but one thing that I like expand expand is a really nice open source set of models head of framework, but I do believe that react is not for the beginner. It doesn't have a nice documentation that you can follow through a lot of time. I have been developing some for a while I I gave Lily laws. I, don't know what he's saying he's like.

A

If you want me to use your model, give me some pointers because I'm trying now just like tuning at the arc, and he does have a really reactive motives- integration with SAS, but I still have him completely grasp at how he's using it. But I would love that because I use reactive, a UI. In summary, a lot of hanging I completely see the advantage. I can play like a conspiracy.

A

It's credible is fluent this, but again sometimes like you can have the very probed, but if you don't have a way for someone who is are using it right away, nothing. You have nothing.

C

Yeah I'm, just the last line before we move to the next question, is like, as they've said, that we get this question that should I use the events of the controller like on activated event or should I use them NATO. That is overwritten already on the templates when you use add new and what they did is that to avoid memory leaks, they created the condo and the template.

C

You do add new controller and you will see on activated over here on the activated over hidden it's because they want to make sure that you disconnect the handler, like you won't wire the handler of that because yeah you, it was not like that before you didn't have the overwritten metals there, like. Obviously you have to okay.

C

Constructor, like get the event, why did it and you'll leave it like that forever and then you think like why my application is just growing in memory non-stop and it was like 300 megabytes in the morning at 8 a.m. but now it's about I'm about to leave the office, and it's like a gia white on memory. Why? Because you never know why the handles, but that's also is not related to X a year for XP or developer Express, please dog net. So I always tell my students, especially because I do a lot of trainings.

C

It's like so much stuff are inherited from dotnet in general. So the more you on the standard net, the easy will you understand, stuff and also I tell them like. If you try to understand what domain components is and what solid development is stuff will be way easier because it is it's like really. They use all the all the most common patterns, more accepted patterns in for the sign in general, so don't try to understand surface it is try to understand the patterns and stuff will be like a piece of cake.

C

It will be obvious for you in all senses, but if you don't understand the patterns, then you will ask this question and you will know where they go, because I will say that 99% of the questions that I get the answer is is dotnet. Stuff is not surface stuff like that. Is don't networks like that and if you understand how networks you will understand why stuff is working this way.

C

So it's like go ahead and go back to your object-oriented programming classes on of the University of your school or whatever of Wikipedia, and anything will make more sense in that. If you do that, all.

B

Right, let's move forward, let me power her I fix. The next free are related together cuz. They are all xpo related.

E

Stuff wants to get them, maybe Dave who was.

C

Looking to the old.

A

C

14 and 15 are yours: Dave.

D

A

I'm beyond saving yeah and then I'm saving a happens, a lot of time when, if you put a breakpoint edge, you will see it that it hits the breakpoint more than once. If I'm not interrupting. Dave like let's say that you have a collection, you have a nested child.

A

So when you save there, it won't save completely to the elevation till their food or gear space will save so it actually hit the breakpoint of that child before and then, when you hit them their parents it with here again, and so there are a lot of cases like that and Dave. You can continue, but that's just one of the daily there, a scenario mm-hmm.

D

That's really on saving for sure, so the the getting set of the properties- it's actually both.

D

You know, there's a lot happening when you first clear that data and then put it into an xpo object and then bind it to a control and then show that control right, there's gonna be a lot of of hitting that classes, getters and setters, because every step along the way, it's it's interacting with that property and so yeah, it's gonna, hit it over and over again, which is why that is saving is loading method or sorry.

D

The properties are in there, so you can tell kind of how far along the lifecycle of that that's just an object you are on. Do you.

G

Want to add something because I have yes.

B

Yeah yeah sure the name, the main reason for it for the first one it's like, if, especially if you're, using a unit of work which accept us by default, it's like you have to do all the kind of property change, tracking between objects and and properties, and when they change it, is this evaluated same well used before before?

B

Well you to reduce overhead and then performance, impacts and subject, please there's one thing that I don't want to mention too much, but it exists if you have like tricks, the WCF data layer, kind of stuff that throws people of the most because they are interacting both sides on the client and on the server with the object model. That's what was one of my question before and then they get totally confused.

B

Could it is hitting on the client that it gets hitting on the client it came up, and my my my business logic runs twice in all kind of calculations. Go wrong. Why? The reason is that's, how xpo interacts with persistent classes and objects? What's the solution or the reason I just told you what how to avoid it always use, is saving in this loading, and sometime is invalidated.

B

If you do business object in setters and kettles, especially if you do it in interceptor or in saving stuff. Okay,.

C

Then my two senses in here is like well: I will just go like deeper into this stuff. It's not I'm not going to answer in the XP or soft way. I will say that I need to find that where that book is because there is one book that is called event-driven design, I need to find it somewhere.

C

I have it somewhere in my computer or back in in cyber or in rush I, don't know what it is, but they said that them, the biggest problem with event-driven design and actually don't make, is a sign on events like UI events. You click something on the handle executors delegate. Is that difference propagate in a way that you might not know about it? So if you're listening to events, sometimes a lot of stuff will clear out of your control.

C

So if he's like event-driven design, then you will need to actually go and see how the events relate to each other to understand how they are working like that and donate in general is event-driven I mean at least the UI is like you have a hundred.

C

The hundred will execute an action or a day late or whatever, so on event-driven design, you don't know how much it will propagate and will look back to execute the same method again, because the event is trying again and again and again so he I mean I will try to find the book because I don't know who who was the writer but I will post it somewhere because I was really interesting, because that is a general in general is a flow of the design pattern.

C

If you design your systems, event-driven I, remember when I was able to write my own events that I told I. This is so nice I can write a delegate and then I can write my event, my own event and just trigger everywhere and then I start to do events for everything and then every says start going out of control. Everything was 300 out of control.

C

So when you do your own events and you start to try to understand how they work, you will understand also the progress that they have, that anything that is event-driven will trigger more than you think. Actually, in general, that's basically it and I will take also number 15. That is what is different between fine object and get object. Fine oblique is going to go and get it from the data layer from the data access layer, so we will basically create the database and get optic.

C

Is that maybe you have two objects faces and the object is loaded in one and not in the other, so to bring that instance to the other object space you have to use gate object. It's not fine object, so doesn't mean different between those two methods.

A

Like I had like all day there, I am, the Xperia has an identity map that it will have save it. There is a day August that you have a memory, so the final gets you only when looked at it will go directly and quality database they get occupy key will get uncheck the Kiche and see if there is there. So if it day you will avoid that trip to the database and every trip to the database is costly. You will pay some performance time for that.

A

So believe me, if you have the IB and you can do get occupy key, that will always be more performance if it doesn't come with a data, corruption or something that is not bringing the new data from the database or something like that. But if it's a perfectly fine approach, that's the day they they way to go because final did it doesn't matter, he will always go to the database. Get occupy key will check the Kiche, and then we will give you little get all.

D

Right there is actually an additional parameter. You can pass into the find object to look for something that's already in session, but I think it ends up. Basically, prolonging the get object anyway. All right, I think that.

A

There is a parameter that you can pass to the ghetto give by key. That will tell you, don't check the catch a go directly to the battery. So that's what I like our stuff is customizable. If you want to like do one way, another one, so you have the default things if you.

B

Do by default, if.

A

We have this choices, but you can.

B

Always sorry, so the thing is we find out check. We can get object by key methods.

B

It's always this kind of performance versus functionality, where's the ease of use and stuff like this, but they're really really comes unit testing into play, because if you have some kind of currency issues, you have to track hole or kind of functionality. You need this business logic where you have absolutely make sure this is the only venue in the database, then you really really have to think about exactly.

A

B

Then you should check that you should be at least test, on the other hand in pain, and you should unit tested stuff, but it doesn't matter.

C

Except for performance, okay, who wants to take the 16 I'll.

A

Tie I tell ya sixteen, so a-holes I'll charge a pint, so this is pretty much a very say if I'm not mistaking I, don't remember the name. Yelled rolls marriage permission or something like that. That I have two choices like grant in any role or grant in old roles that simple. What I mean is like if his grants in any role, if only one of the roles that you have a sign, he half aloud, you will be able to see that of it in the early member mission mode that he says grants in all roles.

A

Every roles have to have allowed that permission for that update. If it is not the case, you won't be happy, you won't have access, that's it and the grant in any role is the one by default. So if you have it in one of the one of those you will be able to see, it I think that bathroom what.

C

I just want to add something here is that if you want to keep it easy with the roles, don't don't melt roles or K parent-child halls, because then sometimes it can be like really complicated. To know when one of your child Rose is in is something that you think that it was allowed, give access to it. So, in the end, like I, remember like I.

C

Well, you know how here we work in like big government agency, single syllable and in the end, when you release the so far, is like well it's time to make the roles you say or say he here we have these two hundred or so we want to create and this how they interact to each other, and it's like yes, but you will have to do it. I don't have to do it myself is, is in user type of stuff that you need to do so.

C

When you tell them like that aside, okay, then we only have three and they used to have like the monitor type of roles with really granular permissions, but that can get really complicated, especially if you have child role. So it's like simple, allow everything and Justin I what you want, because it's easier actually hitting the webinar I think he might be okay still here Jessica. We were talking about that with him in the cold one of these days inside he deny everything.

C

So then it's hard to know what you need to allow if you feel to allow everything, just deny what don't see the profit. Don't see, these don't see that, but it's easier to allow everything and then to to just deny what you want. But of course, if you have the time the money and the resources and the constraints go ahead and do child permissions and taste them and see how they emerge, how they deny. But for me, does more about the.

A

Other side, sometimes we have the situation that, let's say that is just one specific thing like you want to give anyone they're all to free, open, I, push this order or something so the money it doesn't have to be a manager is the manager who say: hey, I won Jose I want Xavier to be able to reopen this, so you do a role only to get acts to do get access to something, and then it is nice to use. I will link that role to your user and you're good to go.

A

So then you have some song few roles on your user and you need to make sure that that that role denied everything except the only functionality I want to give them and that's what.

C

The permission.

A

Say melting mode comes in that grants in any role or grants in all roles. Folks,.

B

Let's we I think we are another for 35 minutes now into the run. So if I look at the next seventeen to twenty fourth questions, those are all best practices and we are right now in in security, best practices, representation and here, from my perspective, I, should we say we should give it a go and probably do a real one, focused episode them only best practices for some kind of modules, cuz, there's so much to talk about it agree.

A

Algorithm play I was about to say we already.

C

As if they're very mean is that what.

A

C

Think we should save day I mean would do this like all the time whatever is left just save it for the next I know.

A

I'm, not only that we can expand on the security best practice day, where you're talking right now so.

B

That the thing is on testing on non CI CDI can.

A

Control and and yeah definitely.

A

B

One question that is, that is 21 I can really really really quickly answer that that this 21 only assembly DLL. Why is it generated and the reason is out of a model, a formal file or the application model? Is it called that gets one for performance reason? There's generate that source code, the compiled and put onto disk from the exact framework and that's the whole application model stored as a DLL and xcf' normally holds this a memory, but for caching reasons it puts it on this great.

C

So I was going to say that, but you say it better than me: man so.

A

Wait a sec. He just asked on the caddy which will increase the frequency of them. It up I beside that I'm.

C

Really flattered.

A

I'm really flattered about that. I think that once a month is good, it was great boy. We everyone here has a lot of work projects they have to attain and we can do. But thank you. Yes, it for does recommendation and we definitely let's make the next one. It's a fair stand up community based practice and we go.

C

Maybe you can put the next questions in suffers weekly and we can just take some of them so agree.

A

And I will do no their sorbet on the say, Facebook group, so everyone can ask anything they want and we can come back to it. But I do enjoy these conversations. A lot so I won't lie. I could be talking here for a while, but I do believe that I think that two hour of 40 minutes that's a lot for anyone to watch later on and YouTube. So thanks everybody thanks thanks runways.

B

A

The time of their vacation things day for taking thing of their day, so thanks everyone who show up a if anyone to want or.

C

Anyone who want to attend anything.

A

But thank you for being here. Ok,.

C

A

C

Take care dave was a pleasure to have you this on this me gas. We hope to have.

F

Many crank steinhager.

D

F

Thanks guys, hey he right: okay, bye, pretty good right.