Doctrine Collections can be deleted in very same way is Doctrine Records you just call delete() method. As for all collections Doctrine knows how to perform single-shot-delete meaning it only performs one database query for the each collection. <br \> <br \> For example if we have collection of users which own [0-*] phonenumbers. When deleting the collection of users doctrine only performs two queries for this whole transaction. The queries would look something like: <br \><br \> DELETE FROM user WHERE id IN (1,2,3, ... ,N)<br \> DELETE FROM phonenumber WHERE id IN (1,2,3, ... ,M)<br \>
<br \><br \> It should also be noted that Doctrine is smart enough to perform single-shot-delete per table when transactions are used. So if you are deleting a lot of records and want to optimize the operation just wrap the delete calls in Doctrine_Connection transaction.
