PHP code example of andrewdalpino / dataloader-php

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

andrewdalpino / dataloader-php example snippets

$batchFunction = function ($keys) {
    return Redis::mget(...$keys);
};

$loader = new BatchingDataLoader($batchFunction);

$cacheKeyFunction = function ($entity, $index) {
    return $entity['id'];
};

$loader = new BatchingDataLoader($batchFunction, $cacheKeyFunction);

use AndrewDalpino\DataLoader\BatchingDataLoader;
use App\User;

// Required batch function to load users with supplied array of buffered $keys.
$batchFunction = function ($keys) {
    return User::findMany($keys);
};

// Optional cache key function returns the primary key of the user entity.
$cacheKeyFunction = function ($user, $index) {
    return $user->id;
};

$userLoader = new BatchingDataLoader($batchFunction, $cacheKeyFunction);

$userLoader->batch(1);

$userLoader->batch([1, 2, 3, 4, 5]);

$userLoader->batch(['a', 'b', 'c', 'd', 'e']);

$user = $userLoader->load('a'); // Returns the user with primary key 'a'.

$users = $userLoader->loadMany(['b', 'c', 'd', 'e']); // Returns an array of users.

$users = $userLoader->loadMany(['b', 'c']); // Additional loads don't hit the database.

$user = $userLoader->load('z'); // Returns null.

$users = $userLoader->loadMany(['y', 'z']); // Return an empty array.

use GraphQL\Type\Definition\ObjectType;
use GraphQL\Deferred;
use UserLoader;

$postType = new ObjectType([
    'fields' => [
        'author' => [
            'type' => 'UserNode',
            'resolve' => function($post) {
                UserLoader::batch($post->author_id);

                return new Deferred(function () use ($post) {
                    return UserLoader::load($post->author_id);
                });
            }
        ],
    ],
]);

$friend = User::find(1);

$userLoader->prime($friend);

$userLoader->flush();

$options = [
    'batch_size' => 1000 // The max number of entities to batch load in a single round trip from storage.
];

$loader = new BatchingDataLoader($batchFunction, $cacheKeyFunction, $options);