| I tried to get the association object to work, but I think I don't get it. The situation is as follows: I have products. Those products have suppliers (many-to-many). The different suppliers have different prices for a product. So what I would like to do is this: # Assume everything is working p = query(Product).get(1) print p.suppliers # This would print [<id=2 name='Apple Computer'>, <id=3 name='Unit 4'>] print p.suppliers.price # This would print Decimal('178.00') This is the code I am using. While it does not give any errors, it won't work either ;-) products = Table('products', metadata, Column('id', Integer, Sequence('products_id_seq',optional=False), primary_key=True), Column('name', Unicode(255), nullable=False), Column('price', Numeric, nullable=False), ) suppliers = Table('suppliers', metadata, Column('id', Integer, Sequence('suppliers_id_seq',optional=False), primary_key=True), Column('name', Unicode(255), nullable=False) ) product_suppliers = Table('product_suppliers', metadata, Column('product_id', Integer, ForeignKey("products.id")), Column('supplier_id', Integer, ForeignKey("suppliers.id")), Column('price', Numeric, nullable=False), Column('precedence', Integer, nullable=False) ) class Product(object): def __init__(self, code, name): self.name = unicode(name) self.price = Decimal(price) class ProductAssociation(object): pass class Supplier(object): def __init__(self, name): self.name = unicode(name) mapper(Supplier, suppliers) mapper(ProductAssociation, product_suppliers, primary_key = [product_suppliers.c.product_id, product_suppliers.c.supplier_id] ) mapper(Product, products, properties={ 'orderproducts': relation(OrderProduct, lazy=False, cascade="all, delete-orphan", backref='product'), 'suppliers': relation(ProductAssociation, lazy=False, cascade="all, delete-orphan", association=Supplier) }) |
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