class hotel_services(osv.Model):
_name = 'hotel.services'
_description = 'Hotel Services and its charges'
_inherits = {'product.product':'service_id'} # explain this code
_columns = {
'service_id': fields.many2one('product.product', 'Service_id', required=True, ondelete='cascade'),
}
_defaults = {
'isservice': 1,
}