I want to extend the functionality of the method that deletes the records of module so that when i do, it also deletes some records related to this one. Can this be done?

I thought that overriding the unlink method would work, but i tried and no result.

Here is my code.

def unlink(self, cr, uid, ids, context=None):
        #Call the parent method to eliminate the records.
        super(Specie, self).unlink(cr, uid, ids, context)

        Actions_Model = self.pool.get('ir.actions.act_window')
        Menus_Model = self.pool.get('ir.ui.menu')

        species = self.browse(cr, uid, ids)
        for specie in species:
            menus = specie.menus
            actions = specie.actions
            if menus:
                for menu in menus:
                    Menus_Model.unlink(cr, uid, menu)
            if actions:
                for action in actions:
                    Actions_Model.unlink(cr, uid, action)
        return True

Edit: I tried using the ondelete attribute as suggested but is not working with one2many fields. I have these 2 fields...

'actions': fields.one2many('ir.actions.act_window', 'specie', 'Actions', ondelete='cascade'),
 'menus': fields.one2many('ir.ui.menu', 'specie', 'Menus', ondelete='cascade')

and when i erase my record i want that it erases the field that are in related via these 2. ondelete='cascade' does that? I try and didn't happen.