PHP code example of ocramius / doctrine-batch-utils

1. Go to this page and download the library: Download ocramius/doctrine-batch-utils library. Choose the download type require.

2. Extract the ZIP file and open the index.php.

3. Add this code to the index.php. 
    
        
<?php
require_once('vendor/autoload.php');

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

ocramius / doctrine-batch-utils example snippets


use DoctrineBatchUtils\BatchProcessing\SimpleBatchIteratorAggregate;

$object1  = $entityManager->find('Foo', 1);
$object2  = $entityManager->find('Bar', 2);

$iterable = SimpleBatchIteratorAggregate::fromArrayResult(
    [$object1, $object2], // items to iterate
    $entityManager,       // the entity manager to operate on
    100                   // items to traverse before flushing/clearing
);

foreach ($iterable as $record) {
    // operate on records here
}


use DoctrineBatchUtils\BatchProcessing\SimpleBatchIteratorAggregate;

$iterable = SimpleBatchIteratorAggregate::fromQuery(
    $entityManager->createQuery('SELECT f FROM Files f'),
    100 // flush/clear after 100 iterations
);

foreach ($iterable as $record) {
    // operate on records here
}


use DoctrineBatchUtils\BatchProcessing\SimpleBatchIteratorAggregate;

// This is where you'd persist/create/load your entities (a lot of them!)
$results = function () {
    for ($i = 0; $i < 100000000; $i += 1) {
        yield new MyEntity($i); // note: identifier must exist in the DB
    }
};
 
$iterable = SimpleBatchIteratorAggregate::fromTraversableResult(
    $results(),
    $entityManager,
    100 // flush/clear after 100 iterations
);

foreach ($iterable as $record) {
    // operate on records here
}

// eventually after all records have been processed, the assembled transaction will be committed to the database