> you need to flip around where you put the "delete-orphan" rule - see my > previous email on the subject. >
In other words: order_mapper = mapper(Order, order_table, properties=dict (orderdetails=relation(OrderDetail, cascade='all,delete-orphan', single_parent=True, backref='parentorder'))) orderdetail_mapper = mapper(OrderDetail, order_detail_table) ===== Thank you very much. That also solved the earlier problem with merge. I don't need to supply both portions of the composite key... it works that out.
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