Yep, there it is. Stupidly simple. Dug up some old know working source
that did and diff and grep later I found the cause.
__table_args__ needs to be give a tuple with an empty dictionary, like
so.
__table_args__ = (ForeignKeyConstraint(['parent_id', 'parent_ref'],
['parent.id', 'parent.ref']), {})
Now all is well, sorry for the ML clutter. I am face palming in 3, 2,
1 ....
On Apr 8, 4:49 pm, Wayne Witzel <[email protected]> wrote:
> I assume I am over looking some simple thing, but I just can't seem to
> find it. Thanks for the assist, I have palms open ready for face
> planting.
>
> Using a class and table with orm.mapper()
>
> class Child(object):
> pass
> child_table = Table('child', meta.metadata,
> Column('parent_id', Integer, primary_key=True),
> Column('parent_ref', Integer, nullable=False),
> Column('content', String(10)),
> ForeignKeyConstraint(['parent_id', 'parent_ref'],
> ['parent.id', 'parent.ref'])
> )
> orm.mapper(Child, child_table)
>
> class Parent(object):
> pass
> parent_table = Table('parent', meta.metadata,
> Column('id', Integer, primary_key=True),
> Column('ref', Integer, primary_key=True)
> )
> orm.mapper(Parent, parent_table, properties={
> 'children':relation(Child, lazy=False)
>
> })
>
> Produces the following create
>
> 2009-04-08 16:36:54,319 INFO sqlalchemy.engine.base.Engine.0x...a6b0
> CREATE TABLE parent (
> id INTEGER NOT NULL,
> ref INTEGER NOT NULL,
> PRIMARY KEY (id, ref)
> )
> 2009-04-08 16:36:54,319 INFO sqlalchemy.engine.base.Engine.0x...a6b0
> {}
> 2009-04-08 16:36:54,454 INFO sqlalchemy.engine.base.Engine.0x...a6b0
> COMMIT
> 2009-04-08 16:36:54,456 INFO sqlalchemy.engine.base.Engine.0x...a6b0
> CREATE TABLE child (
> parent_id INTEGER NOT NULL,
> parent_ref INTEGER NOT NULL,
> content VARCHAR(10),
> PRIMARY KEY (parent_id),
> FOREIGN KEY(parent_id, parent_ref) REFERENCES parent (id, ref)
> )
>
> Using what I believe is the exact same thing with declarative produces
> the creates minus the composite foreign key and then of course is
> unable to establish the relation.
>
> class Parent(Base):
> __tablename__ = 'parent'
> id = Column(Integer, primary_key=True)
> ref = Column(Integer, primary_key=True)
> children = relation("Child", lazy=False)
>
> class Child(Base):
> __tablename__ = 'child'
> __table_args__ = ForeignKeyConstraint(['parent_id','parent_ref'],
> ['parent.id', 'parent.ref'])
>
> parent_id = Column(Integer, primary_key=True)
> parent_ref = Column(Integer, nullable=False)
> content = Column(String(10))
>
> The create output is
>
> 2009-04-08 16:47:08,331 INFO sqlalchemy.engine.base.Engine.0x...a710
> CREATE TABLE child (
> parent_id INTEGER NOT NULL,
> parent_ref INTEGER NOT NULL,
> content VARCHAR(10),
> PRIMARY KEY (parent_id)
> )
> 2009-04-08 16:47:08,331 INFO sqlalchemy.engine.base.Engine.0x...a710
> {}
> 2009-04-08 16:47:08,464 INFO sqlalchemy.engine.base.Engine.0x...a710
> COMMIT
> 2009-04-08 16:47:08,466 INFO sqlalchemy.engine.base.Engine.0x...a710
> CREATE TABLE parent (
> id INTEGER NOT NULL,
> ref INTEGER NOT NULL,
> PRIMARY KEY (id, ref)
> )
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