GitLab GraphQL, 13 Feb 2020

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From YouTube: Learning GraphQL - Mutations

Description

Basics of mutations step by step

A

Hello, everybody. Today we are gonna going to learn how to create a graphical mutation. So, let's just start with it the first we just quickly run. So we are we're going to create mutation for updating project description so like, let's just run quick query to get like current description of the project.

A

Okay right and we want to update information, so let's just create a mutation. The mutation is basically just kind of a kind of a different type of query, but it's look like it looks pretty the same and the steps which allow us to create mutation output is the same. We have four types, so I have already procreate some classes, so it can go with Quicken, it's basically in application. We have graph KL mutations and, if I said, look, this mutation for blade instruction will be first, but maybe there'll be another annotations for projects.

A

So we just like extract from the beginning everything to the base mutation for project okay. So what we're going to need?

A

Firstly, we need to add arguments, arguments.

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What we are going to need in every project mutation is actually argument for the food bus.

A

Okay- and we are in this petition- we are returning petition except utterance to something, and we are Jordan tag the object and do we need the field for this.

A

Okay, so this will be a type project.

A

Which we also need, so we have this full bus and we need to have to transform to look finds object itself, but in truly invest mutation, I guess one minute.

A

Okay, so I just quickly make a little cheat and let's just see how this finding objects is created in.

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Inazuma mutations so basically find objects, object.

A

Is submitted needed.

A

Sorry, so this method is needed for our eyes. So basically, if we are let's just just created and I'll explained, maybe later when I understand myself, why we need the spaces.

A

We also want sexual. We have already helped for such cases.

A

So we actually have concerned which allow us to result project by full puss. So we just basically want to include this concern to our base. Meditation.

A

Okay and in our final project, we just want to reduce it.

A

Right so we actually have some basic technology for mutation and we want to go straight up the description addition. Okay, so we inherited from base right and we will need additional argument.

A

So we want to the description. So that's the called description and it's not kale string.

A

A

Very informative, but what else so we have our argument and we have to implement this method results.

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To be able to form this petition and we are listed there, art once.

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First of all, we just find our projects.

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And and there we will use notice, find project methods, but we will use some more interesting. It's the method called authorized, authorized, find and we'll pass there now of bus.

A

It's right, and just like take a moment and let's see where this authorized find is actually great. So this is from helper authorized air source craft characterized of stress resource, and what is actually it do it actually use this, find object, method and search for the object of performs, oscillation and return knowledge. So what else do we need to use? This beautiful helper is actually create in oscillation, yeah, Sri, sweet.

A

Like this, so everybody can of the inscription. Why not.

A

Okay, so right now we actually wanted to like. We have a our final project. We we just can simply update description.

A

Right so in the most sophisticated mutation we actually want to use some service here. Let me just show you some more complicated mutation proteins, this one yeah, so you can see there that we are like found in our objects and then we are cooling for what is updates arise, pass the parameters, error and returning some values. So, okay, we updated description right and we want to return something from this mutation and basically we want to return. So we have this actual project. We want to return it right, but as well.

A

We also want to return, killed, object. Sorry and again, sorry errors object right, so it actually is implemented on base mutation calls. So basically we need to demand. We need this field because we want to show some right messages for errors and we actually can't return it back if we are.

A

Okay and let's just try to write it, there.

A

Yeah- and we are forgot to actually name this mutation somehow in some.

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Description: okay, let's see if we have such just remote.

A

Take some time and so just see what else we forgot to do: yeah so basically I create and such mutation is not enough. We have to actually mount it to base mutation and I will ready, see there pal there and that's okay, yeah I saw we actually need to find a right type for the space station dish that yeah and we want to mount mutations.

A

Page because it wasn't bounce itself.

A

What will be interesting is here as well sure you can see that actually mutation. It's looks very similar to that, and this is one of great things about craft kale, because everything is kind of a certain standardized, and this is actually to guess how what you have to write. Okay, so just start from the beginning again,.

A

And this is it: our new mutation is added to the list. First description we need to so. Basically, our sole argument is input, but in the input we can add our pilot arguments.

A

We want to get this project want to get description so where you basically write in the same query. So this mutation return back our project and errors, but we actually have to explicitly same what we want to get further and errors right.

A

A

It doesn't work, let's just try. Look at this one nope, what's wrong! Okay, let's see.

A

Yeah, we are forgot to.

A

Pass right arguments: let's just try, try to running it again.

A

You can just put your I it. It's not very helpful. Okay, it's running.

A

Yeah I'm Eric, um so we actually yeah our petition working. We can just like just to be sure we can really run the query.

A

It's kind of late today, so my laptop just want to sleep I guess so. It's kind of for so long.

A

Yeah I work. um Okay, so our arbitration is working. I hope it will be. It was helpful for you so see you next time.