Lets say we have two classes User and Group which are linked trhough a GroupUser association class. When working with transient (new) records the fastest way for adding a User and couple of Groups for it is:
<code type='php'>
$user = new User();
$user->name = 'Some User';
$user->Group[0]->name = 'Some Group';
$user->Group[1]->name = 'Some Other Group';
$user->save();
</code>
However in real world scenarious you often already have existing groups, where you want to add a given user. The most efficient way of doing this is:
<code type='php'>
$gu = new GroupUser();
$gu->user_id = $userId;
$gu->group_id = $groupId;
$gu->save();
</code>
+++ Deleting a link
While the obvious and convinient way of deleting a link between User and Group would be the following, you still should *NOT* do this:
<code type='php'>
$user = $conn->getTable('User')->find(5);
$user->GroupUser
->remove(0)
->remove(1);
</code>
The right way to delete links between many-to-many associated records is by using the DQL DELETE statement. Convenient and recommended way of using DQL DELETE is trhough the Query API.
