diasfs/graphql-php-resolvers

Directive and Field resolvers for graphql-php

1.0.1 2019-02-12 12:19 UTC

Requires

• guzzlehttp/promises: ^1.3

MIT

• Fábio Dias

README

Simplified resolvers for webonyx/graphql-php.

Quick start

Install the library via composer:

composer require diasfs/graphql-php-resolvers

Field Resolver

require __DIR__ . "/vendor/autoload.php";
use GraphQL\Utils\BuildSchema;
use GraphQL\GraphQL;
use GraphQL\Resolvers\FieldResolver;

$schema_gql = <<<gql
schema {
    query Query
}

type Query {
    hello:String
}
gql;

$data = array(
    'Query' => array(
        'hello' => "Hello World!"
    )
);

$schema = BuildSchema::build($schema_gql, function($typeConfig) use ($data) {

    return FieldResolver::TypeConfigDecorator($typeConfig, function($type_name, $field_name) use ($data) {
        return $data[$type_name][$field_name];
    });

});

$query = <<<gql
query {
    hello
}
gql;

$result = GraphQL::executeQuery($schema, $query, $rootValue, null, $variableValues, $operationName);
$result = $result->toArray();

print_r($result);

Result:

Array
(
    [data] => Array
        (
            [hello] => Hello World!
        )
)

Directive Resolver

require __DIR__ . "/vendor/autoload.php";
use GraphQL\Utils\BuildSchema;
use GraphQL\GraphQL;
use GraphQL\Resolvers\FieldResolver;
use GraphQL\Resolvers\DirectiveResolver;

$schema_gql = <<<gql
directive @upper on FIELD_DEFINITION | FIELD
directive @lower on FIELD_DEFINITION | FIELD

schema {
    query Query
}

type Query {
    hello:String @upper
    world:String
}
gql;

$data = array(
    'Query' => array(
        'hello' => "Hello",
        'world' => "World",
    )
);

$schema = BuildSchema::build($schema_gql, function($typeConfig) use ($data) {

    return FieldResolver::TypeConfigDecorator($typeConfig, function($type_name, $field_name) use ($data) {
        return $data[$type_name][$field_name];
    });

});

$directives = array(
    'upper' => function($next, $directiveArgs, $value, $args, $context, $info) {
        return $next($value, $args, $ctx, $info)->then(function($str) {
            return strtolupper($str);
        });
    },
    'lower' => function($next, $directiveArgs, $value, $args, $context, $info) {
        return $next($value, $args, $ctx, $info)->then(function($str) {
            return strtolower($str);
        });
    }
);

DirectivesResolver::bind($schema, function($name) use ($directives) {
    return $directives[$name];
});

$query = <<<gql
query {
    hello
    world @lower
}
gql;

$result = GraphQL::executeQuery($schema, $query, $rootValue, null, $variableValues, $operationName);
$result = $result->toArray();

print_r($result);

Result:

Array
(
    [data] => Array
        (
            [hello] => HELLO
            [world] => world
        )
)