Doctrine Foreign Key Management

doctrine-fk.php

<?php

class Post
{
    public function addComment(Comment $comment)
    {
        $this->comments->add($comment);
        $comment->setPost($this);
    }
}

$post = new Post;
$post->addComment($comment);
$em->persist($post);
$em->flush();
# Comment now has FK

# Keeping entity relationships in sync is pretty easy.
# An even easier way to do it is to add cascade={"persist"} to the annotation.
# Then you don't have to do $comment->setPost($post);