and here is the new traceback ;-)
Traceback (most recent call last):
File "foo.py", line 38, in <module>
DBSession.flush()
File "/Users/michael/programming/rumdemo3/lib/python2.5/site-
packages/SQLAlchemy-0.5.0beta3-py2.5.egg/sqlalchemy/orm/scoping.py",
line 106, in do
return getattr(self.registry(), name)(*args, **kwargs)
File "/Users/michael/programming/rumdemo3/lib/python2.5/site-
packages/SQLAlchemy-0.5.0beta3-py2.5.egg/sqlalchemy/orm/session.py",
line 1409, in flush
flush_context.execute()
File "/Users/michael/programming/rumdemo3/lib/python2.5/site-
packages/SQLAlchemy-0.5.0beta3-py2.5.egg/sqlalchemy/orm/
unitofwork.py", line 265, in execute
UOWExecutor().execute(self, tasks)
File "/Users/michael/programming/rumdemo3/lib/python2.5/site-
packages/SQLAlchemy-0.5.0beta3-py2.5.egg/sqlalchemy/orm/
unitofwork.py", line 753, in execute
self.execute_save_steps(trans, task)
File "/Users/michael/programming/rumdemo3/lib/python2.5/site-
packages/SQLAlchemy-0.5.0beta3-py2.5.egg/sqlalchemy/orm/
unitofwork.py", line 771, in execute_save_steps
self.execute_dependencies(trans, task, True)
File "/Users/michael/programming/rumdemo3/lib/python2.5/site-
packages/SQLAlchemy-0.5.0beta3-py2.5.egg/sqlalchemy/orm/
unitofwork.py", line 783, in execute_dependencies
self.execute_dependency(trans, dep, True)
File "/Users/michael/programming/rumdemo3/lib/python2.5/site-
packages/SQLAlchemy-0.5.0beta3-py2.5.egg/sqlalchemy/orm/
unitofwork.py", line 765, in execute_dependency
dep.execute(trans, isdelete)
File "/Users/michael/programming/rumdemo3/lib/python2.5/site-
packages/SQLAlchemy-0.5.0beta3-py2.5.egg/sqlalchemy/orm/
unitofwork.py", line 722, in execute
self.processor.process_dependencies(self.targettask, [elem.state
for elem in self.targettask.polymorphic_todelete_elements], trans,
delete=True)
File "/Users/michael/programming/rumdemo3/lib/python2.5/site-
packages/SQLAlchemy-0.5.0beta3-py2.5.egg/sqlalchemy/orm/
dependency.py", line 181, in process_dependencies
self._synchronize(state, child, None, True, uowcommit)
File "/Users/michael/programming/rumdemo3/lib/python2.5/site-
packages/SQLAlchemy-0.5.0beta3-py2.5.egg/sqlalchemy/orm/
dependency.py", line 251, in _synchronize
sync.clear(dest, self.mapper, self.prop.synchronize_pairs)
File "/Users/michael/programming/rumdemo3/lib/python2.5/site-
packages/SQLAlchemy-0.5.0beta3-py2.5.egg/sqlalchemy/orm/sync.py", line
28, in clear
raise AssertionError("Dependency rule tried to blank-out primary
key column '%s' on instance '%s'" % (r, mapperutil.state_str(dest)))
AssertionError: Dependency rule tried to blank-out primary key column
'project_programming_language.programming_language_id' on instance
'[EMAIL PROTECTED]'
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