Dependent=true, too much data is deleted

Hi all,

Nasty problem: I have model Event and model Post, and both are
associated with model Comment through a hasMany association. I've also
set dependent = true:

var $hasMany = array(
'Comment' => array(
'foreignKey' => 'parent_id',
'conditions' => "Comment.parent_type = 'event'",
'order' => "Comment.id ASC",
'dependent' => true
);

Now, when I delete Event with id 28, all comments with parent_id 28
will be deleted, also the ones that belong to Post.

I guess I know why this happens (dependent only uses the parent_id to
determine the comments to be deleted, not the extra conditions), but
might there be a way of dealing with this other than defining a
comments model for every other model that needs it?

Thanks,

Jeroen
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