Separate the properties of the parent and the children

I want to talk about the inheritance, simple type and columns_aggregation.

Here an example of parent classes and two sub-classes : http://pastebin.com/5qJKtgp1
Here the generated models classes : http://pastebin.com/j2PmT7sd

To sum up : The parent class is Show, and the sub-classes are Video and Playlist.

• A Show have a title.
• A Video have a filename.
• A Playlist have a user.

The problem that appear with the generated models, Is that the following code is working.
$playlist = Doctrine_Core::getTable ("Model_Playlist")->find (3);
$playlist->filename;

Or, the POO concept want that the filename property doesn't exist/available on a Playlist object. And Doctrine should throw an Exception ! Or, It is not the case.

The solution is to move the generated code of the sub-classes into there own classes.
Here the complete solution : http://pastebin.com/LzTG10P7

The problem with the one-to-one or many-to-many relationship is still the same.

The solution is more POO compliant.