Graphql Magento 2

Graphql Magento 2

GraphQL is a query language that is used for APIs and runtime for attaining several queries for existing data. GraphQl proffers an entire and understandable of the data in APIs. It very much helps the clients to question what exactly they need. Graphql makes it easy to evolve APIs over the time and also enables the powerful developer tools.  We can create Schema of our own with the help of Graphql, which can be organized in the terms of fields and types. It is also used for optimizing the flexibility and performance. It will certainly give you what you need in a response, and you get exactly the predictable result in its response.

Graphql in Magento

There has been a rapid rise in the of the PWA in magneto, and there is a requirement of getting a smaller amount of the data and also to make less API requests. Query language of the Graphql makes it absolutely possible by enabling the requestors to the requests a limited to an extent subset of the attributes to get returned of around an entity( smaller response) and let you chain the requests. Graphql is used by the magneto to proffer an alternative to the SOAP and REST web APIs for front end development.

Magento 2.3 Graphql current state as of now.

Graphql was implemented by Magento in order to provide an alternative and SOAP and REST web APIs for the development of the front end. It was introduced with the Magento 2.3.0. The coverage of the GRaphql has also increased with the release of every Magento.

We have the possibility to define schema patches and data since the magento 2.3 graphql schema. This methods enables better control over various changes in the data. Magento 2.3 offers a bunch of features like PWA, multi-store inventory, Graphqi, and a lot more features.  Some of the features will be available in Graphql Magento 2, such as Magento payment, etc. You can simply download the Magento 2 graphql and Magento 2.3 beta version from Github.

Here are some core module Magento 2.3 Graphql example, take a look:

• CatalogInventoryGraphQl
• CatalogUrlRewriteGraphQl
• BundleGraphQl
• CatalogGraphQ
• ConfigurableProductGraphQl
• CustomerGraphQl
• DownloadableGraphQl
• EavGraphQl
• GroupedProductGraphQ
• TaxGraphQl
• ThemeGraphQl
• UrlRewriteGraphQl
• WeeeGraphQ

Let’s have a look at the concepts of Graphql. We will talk about the step by step process of how to implement Graphql magneto 2.

1. You need to create this file for your registering your module.

app/code/Test/TestGraphQl/registration.php

2. Coming to the second step, for defining the module you have to create the

app/code/Test/TestGraphQl/etc/module.xml and then you are good to go with it.

3. Third step includes, initially, we have to define the Schema of the query. In this step of the process we have to mention that which fields and what type of the data gets returned in the response. Talking about the Schema, it is a container of your type hierarchy, that accepts the root types in the constructor and proffers several methods for getting the information about the type to your internal tools of Graphql.

The scheme comes with two types of roots:

• Query type, which is a surface of your read API.
• Mutation type, which is optional, It exposes write API by declaring all the possible mutations in your application.

We are going to learn query types in the blog.

4. You have to create a query resolver model class that is defined in Schema. In this method of the resolve, we just return the data of the customer, which is logged in.

In order to install this module, you need to run the following commands.

1 – php bin/magento setup:upgrade

2 – php bin/magento cache:flush

You can also check the query of your Graphql with the help of a chrome extension, which you can easily install in the chrome. The name of the extension is ChromeIQL.

If you wish to check the query, first, you have to set an end point.

<magento root url>/graphql

Magento use the module of Graphql to manage the custom o pre defined Graphql quires. You can witness your custom queries after you set the end point in the section of the document explorer.