hi.
i have somewhat messy setup (~test case), about association with
intermediate table/class, double pointing to one side and single
pointing to another. i do set up both A-links in one item; and set up
only first in another item, the other link (a2_link) is pre-set to None.
And, i have the error below since r3695.
The error seems to disappear if i do not explicitly initiate the a2_link
to None - dont touch it or set to some object.
Any idea what's wrong?
Traceback (most recent call last):
File "a.py", line 91, in <module>
s.flush()
File "/home/az/src/hor-trunk/sqlalchemy/orm/session.py", line 683, in
flush
self.uow.flush(self, objects)
File "/home/az/src/hor-trunk/sqlalchemy/orm/unitofwork.py", line 209,
in flush
flush_context.execute()
File "/home/az/src/hor-trunk/sqlalchemy/orm/unitofwork.py", line 436,
in execute
UOWExecutor().execute(self, head)
File "/home/az/src/hor-trunk/sqlalchemy/orm/unitofwork.py", line 1055,
in execute
self.execute_save_steps(trans, task)
File "/home/az/src/hor-trunk/sqlalchemy/orm/unitofwork.py", line 1074,
in execute_save_steps
self.execute_childtasks(trans, task, False)
File "/home/az/src/hor-trunk/sqlalchemy/orm/unitofwork.py", line 1092,
in execute_childtasks
self.execute(trans, child, isdelete)
File "/home/az/src/hor-trunk/sqlalchemy/orm/unitofwork.py", line 1055,
in execute
self.execute_save_steps(trans, task)
File "/home/az/src/hor-trunk/sqlalchemy/orm/unitofwork.py", line 1072,
in execute_save_steps
self.execute_dependencies(trans, task, False)
File "/home/az/src/hor-trunk/sqlalchemy/orm/unitofwork.py", line 1085,
in execute_dependencies
self.execute_dependency(trans, dep, False)
File "/home/az/src/hor-trunk/sqlalchemy/orm/unitofwork.py", line 1066,
in execute_dependency
dep.execute(trans, isdelete)
File "/home/az/src/hor-trunk/sqlalchemy/orm/unitofwork.py", line 1021,
in execute
self.processor.process_dependencies(self.targettask, [elem.obj for
elem in self.targettask.polymorphic_tosave_elements if elem.obj is not
None], trans, delete=False)
File "/home/az/src/hor-trunk/sqlalchemy/orm/dependency.py", line 282,
in process_dependencies
self._synchronize(obj, child, None, False, uowcommit)
File "/home/az/src/hor-trunk/sqlalchemy/orm/dependency.py", line 317,
in _synchronize
self.syncrules.execute(source, dest, obj, child, clearkeys)
File "/home/az/src/dbcook/sqlalchemy/orm/sync.py", line 91, in execute
rule.execute(source, dest, obj, child, clearkeys)
File "/home/az/src/dbcook/sqlalchemy/orm/sync.py", line 139, in execute
raise exceptions.AssertionError("Dependency rule tried to blank-out
primary key column '%s' on instance '%s'" % (str(self.dest_column),
mapperutil.instance_str(dest)))
sqlalchemy.exceptions.AssertionError: Dependency rule tried to blank-out
primary key column 'IntermediateAB.a2_link_id' on instance
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