Hermann Himmelbauer wrote:
Am Montag, 2. Juni 2008 20:04 schrieb Hermann Himmelbauer:
In my zope3 tests, I set up some basic test data. After that, I'm calling
transaction.commit(). However, I get the following traceback:

--------------- snip -------------------
  File "copy_reg.py", line 69, in _reduce_ex
    raise TypeError, "can't pickle %s objects" % base.__name__
TypeError: can't pickle module objects
------------------ snip -------------------

I found it by myself: I registered a zope.sqlalchemy related utility, which stores an engine (self.engine = create_engine(DSN,...)) and a scoped session (self.Session = scoped_session(sessionmaker...)). These two objects cannot be serialized, hence the above problem.

Now I'm unsure what to do about this problem - is there any code available that demonstrates how to register SA engines/Sessions as utilities?

The simplest solution is to register the Session object as a global utility.


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