geoalchemy/geoalchemy — pull request #7 by kwirk (2011-12-13 21:53:41+00:00)
Title: Null comparison and not equal operator

- Added functionality to check geometry is Null using '==' syntax
- Added '!=' operator to call 'NOT ST_Equal' and 'IS NOT NULL'
I've added tests for these two additions, but unfortunately for postgis only, as that is all I have available to test with currently.

Idea came from google groups question from Will Furnass and work around from Tobias.