def register(self, obj):
"""
Serialize early to inspect PicklingErrors
Raise any PicklingErrors when the object is added to the
transaction as opposed to when the transaction is committed.
Under pdb, for example, this allows inspecting the code that made
the change resulting in the PicklingError.
Requires either zope.testrunner or zope.testing which can be included using
the 'zodb' or 'zodb-testing' extras respectively.
"""
orig_register(self, obj)
writer = ObjectWriter(obj)
# Replace the pickler so that it doesn't set oids
import cPickle as pickle
writer._p = pickle.Pickler(writer._file, 1)
# Try to serialize to raise piclkling errors early
writer.serialize(obj)
