The way many to many behaves, does not appear to be very intuitive, and is not nice to use. for example

$tag1 = \Tag::findFirst('id=1');
$tag2 = \Tag::findFirst('id=2');
$tag3 = \Tag::findFirst('id=3');

// create a post
$post = new \Post();
$post->tags = array($tag1, $tag2);
$post->save();

// edit a post
$post = \Post::findFirst('id=1'); // the same post that was created earlier
$post->tags = array($tag1, $tag3);
$post->save();

Will tend to mean the post ends up with all three tags, possibly even with an extra copy of tag1, rather than just 2 as might be expected, and how Doctrine works.

Is this a bug, or intended behaviour?

Some official word on this would be great, seems to attract a few people asking about it http://forum.phalconphp.com/discussion/2190/many-to-many-expected-behaviour

thanks :)

Want to back this issue? Post a bounty on it! We accept bounties via Bountysource.