Hello,
I have difficulties building an *-* relationship on the same table.
#
# products <-> products
#
products_products = schema.Table('products_products', Base.metadata,
schema.Column('id_productA', types.Integer,
schema.ForeignKey('products.id_product'), primary_key=True),
schema.Column('id_productB', types.Integer,
schema.ForeignKey('products.id_product'), primary_key=True),
)
class Product(Base):
__tablename__ = 'products'
#
# attributes
#
id_product = schema.Column('id_product', types.Integer,
schema.Sequence('seq_id_product', optional=True), primary_key=True)
...
substitute = orm.relation('Product', secondary=products_products)
This leads to:
Could not determine join condition between parent/child tables on
relation Product.substitute.
Where is my mistake ?
Thanks for your help.
Thomas
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