I am not sure when the change was introduced but the following mapper,
which previously worked:
mapper(Section, section_table, properties = {'items': relation(Item,
backref='section'), 'keywords':relation(Keyword,
primaryjoin=and_(keyword_table.c.uuid==itemkeyword_table.c.keyword_uuid,
item_table.c.uuid==itemkeyword_table.c.item_uuid,
section_table.c.id==item_table.c.section_id), viewonly=True,
foreign_keys=[keyword_table.c.uuid],
remote_side=[item_table.c.section_id])})
now produces the following error:
sqlalchemy.exceptions.ArgumentError: Could not determine relation
direction for primaryjoin condition 'keyword.uuid =
item_keyword.keyword_uuid AND item.uuid = item_keyword.item_uuid AND
section.id = item.section_id', on relation Section.keywords (Keyword).
Specify the foreign_keys argument to indicate which columns on the
relation are foreign.
I am not sure what needs modification in the mapper to be compatible
with the current trunk.
Steve
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