I use pickle to serialise unsaved objects in a user session. Normally
this works fine, except that for development I use an auto-reloading
server, and pickling some objects is hitting a case where some lazy
attribute isn't fully compiled.
...
File '/home/avdd/work/careflight/src/intranet.ops2/carenet/lib/
python2.5/site-packages/sqlalchemy/orm/collections.py', line 607 in
__getstate__
return {'key': self.attr.key,
AttributeError: 'NoneType' object has no attribute 'key'
This is when using an ordering_list.
I would have assumed that calling orm.compile_mappers() is enough to
prevent this problem, but that is not so.
Is there some hook that I can call when my application is fully
initialised to ensure that all attributes are fully instrumented and
avoid this pickling problem? Or can I just do a sweep of all my
mapper attributes at startup?
While the problem is nothing more than an inconvenience for me, I
intend to make heavy use of pickled objects for draft object storage
and don't want my users losing data across system restarts.
a.
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