Magento 2: Create custom GraphQL data

We can create custom api for GraphQL.

As per the app/code/ standard, our module name is Magemonkeys/Customgraphql

We can create schema.graphqls file in module etc folder.

Below is the code for that file.

type Query
{
    CustomGraphql (
        username: String @doc(description: "Email of the customer")
        password: String @doc(description: "Password")
        fieldtype: String @doc(description: "Field Type")
    ): CustomGraphqlOutput @resolver(class: "Magemonkeys\\Customgraphql\\Model\\Resolver\\ResolverGraphql") @doc(description:"Customgraphql Datapassing")
}
type CustomGraphqlOutput
{
    username: String
    password: String
    fieldtype: String
}

type Query

{

CustomGraphql (

username: String @doc(description: "Email of the customer")

password: String @doc(description: "Password")

fieldtype: String @doc(description: "Field Type")

): CustomGraphqlOutput @resolver(class: "Magemonkeys\\Customgraphql\\Model\\Resolver\\ResolverGraphql") @doc(description:"Customgraphql Datapassing")

}

type CustomGraphqlOutput

{

username: String

password: String

fieldtype: String

}

After that we need to create Model Resolver file.

Create file ResolverGraphql.php in this location of module
Magemonkeys/Customgraphql/Model/Resolver/

Below is the code for that file.

<?php
namespace Magemonkeys\Customgraphql\Model\Resolver;

use Magento\Framework\GraphQl\Config\Element\Field;
use Magento\Framework\GraphQl\Exception\GraphQlInputException;
use Magento\Framework\GraphQl\Query\ResolverInterface;
use Magento\Framework\GraphQl\Schema\Type\ResolveInfo;
use Magento\Framework\Exception\NoSuchEntityException;
use Magento\Framework\GraphQl\Exception\GraphQlNoSuchEntityException;

class ResolverGraphql implements ResolverInterface
{
    public function resolve(
        Field $field,
        $context,
        ResolveInfo $info,
        array $value = null,
        array $args = null)
    {
        if (!isset($args['username']) || !isset($args['password']) || !isset($args['fieldtype'])||
            empty($args['username']) || empty($args['password']) || empty($args['fieldtype']))
        {
            throw new GraphQlInputException(__('Invalid arguments list please check.'));
        }
        $output = [];
        $output['username'] = $args['username'];
        $output['password'] = $args['password'];
        $output['fieldtype'] = $args['fieldtype'];
      
        return $output ;
    }
}

<?php

namespace Magemonkeys\Customgraphql\Model\Resolver;

use Magento\Framework\GraphQl\Config\Element\Field;

use Magento\Framework\GraphQl\Exception\GraphQlInputException;

use Magento\Framework\GraphQl\Query\ResolverInterface;

use Magento\Framework\GraphQl\Schema\Type\ResolveInfo;

use Magento\Framework\Exception\NoSuchEntityException;

use Magento\Framework\GraphQl\Exception\GraphQlNoSuchEntityException;

class ResolverGraphql implements ResolverInterface

{

public function resolve(

Field $field,

$context,

ResolveInfo $info,

array $value = null,

array $args = null)

{

if (!isset($args['username']) || !isset($args['password']) || !isset($args['fieldtype'])||

empty($args['username']) || empty($args['password']) || empty($args['fieldtype']))

{

throw new GraphQlInputException(__('Invalid arguments list please check.'));

}

$output = [];

$output['username'] = $args['username'];

$output['password'] = $args['password'];

$output['fieldtype'] = $args['fieldtype'];

return $output ;

}

After that you can check API in Postman API tool.

That’s it.

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