On python 3.7 SQLAlchemy 1.3.13
I'm running into an issue when doing a session.refresh(orm_object) where
for certain objects it throws an exception because in line 709 of
orm/loading.py, the 'state.load_path' is an empty tuple. Attached the
relevant snippet of the stack dump below.
This was simple test with no actual changes:
task = Task.query.filter(blah).one()
session.refresh(task)
Again it works for some, not for others.
Is there was something obvious that might cause this - perhaps I'm
misunderstanding how refresh works? We have numerous relationships on the
model that often refer to the same table (multiple 'user_id' fk
references). This hasn't causes us any other issues, but it's worth noting.
I will try to pare down the model to isolate what the cause is, and follow
up with a test case if I can. But wanted to see if it was anything obvious
before I dig too deep.
File "/-/lib/python3.7/site-packages/sqlalchemy/orm/loading.py", line
709, in _populate_full
elif load_path != state.load_path:
File "-/lib/python3.7/site-packages/sqlalchemy/orm/path_registry.py",
line 63, in __eq__
return other is not None and self.path == other.path
AttributeError: 'tuple' object has no attribute 'path'
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