There are a few places in my code that does `q.filter(None)`, e.g.
something like this:
def base_filter(self):
# subclasses may set this, or not
pass
def base_query(self):
q = self.model_cls.query
q = q.filter(self.base_filter())
return q
Previously, it would generate "SELECT * FROM xxx".
In 0.8, it now generates "SELECT * FROM xxx WHERE NULL", and subsequently
no row is returned.
The change was introduced 2 months ago in
http://sqlalchemy.org/trac/changeset/b221bb4385a4
Anyway, the 0.8 behavior does feel a bit more correct, so perhaps I shall
fix my code instead :)
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