stefanofontanelli/ColanderAlchemy — pull request #42 by tisdall (2014-01-23 21:47:49+00:00)
Title: fixed issues with None-like values and autoincrement fields

- changed "missing" to colander.drop instead of None or
empty lists so the resulting appstruct can be passed back
into schema.serialize() without issue
(Ex. Integer types caused colander.Invalid as None is not
a valid integer value)
- likewise, don't add None values to dictionaries returned
by dictify() so that can be used as an appstruct
- modified detection of autoincrement fields so they can
be properly set to missing=colander.drop (wasn't detecting
ForeignKey constraints)