'Center A', 'ref' => 'centerA', ], [ 'name' => 'Center B', 'ref' => 'centerB', ], ]; public static $refs = []; public function getOrder() { return 100; } public function load(ObjectManager $manager) { foreach (static::$centers as $new) { $center = new Center(); $center->setName($new['name']); $manager->persist($center); $this->addReference($new['ref'], $center); static::$refs[] = $new['ref']; } $manager->flush(); } }