I've been experiencing a weirdness.
Using SQLAlchemy 0.8.3 and PostgreSQL with declarative (and deferred
reflection), if I don't manually force a reflection *before* I call
prepare then - when I use certain objects - I get an error which
indicates that SQLAlchemy did not reflect secondary tables. Is this a
known issue? It's really hard to find an isolated test case.
InvalidRequestError: When initializing mapper
Mapper|ObjectOne|table_one, expression 'table_one_secondary_table'
failed to locate a name ("name 'table_one_secondary_table' is not
defined"). If this is a class name, consider adding this
relationship() to the <class 'ObjectOne> class after both dependent
classes have been defined.
the table 'table_one_secondary_table' is like this:
class ObjectOne(Base):
__tablename__ = 'table_one'
....
object_twos = relationship(
ObjectTwo, backref='object_one',
cascade="save-update,merge,refresh-expire,expunge",
secondary='table_one_secondary_table',
passive_deletes=True
)
--
Jon
Software Blacksmith
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