Can you explain me please, how to index Doctrine entity collections? I have an entity Article with collection of related Categories defined as @ManyToMany relationship. In this annotation I have parameter indexBy="id" which I hope creates an array of Categories indexed by its IDs. But the Categories collection is indexed like an php array from 0. The code looks like:
/**
* @ORM\ManyToMany(targetEntity="Category", inversedBy="articles", indexBy="id", cascade={"persist", "remove"})
* @ORM\JoinTable(name="articles_categories")
*/
private $categories;
Can you tell me what am I doing wrong? THX.
