Hi All,
I'm reading
http://www.sqlalchemy.org/trac/browser/examples/versioning/history_meta.py?rev=7253:3ef75b251d06
and I'm curious about the following in line 112-114:
- what does iterate_to_root do?
- why do we need to iterate over the object mappers and the history mappers?
- what does hm.single indicate?
cheers,
Chris
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