peewee.IntegrityErro no fallback to update
> could it be updated to work with unique constraint too?

That would be a couple line function to write, so I think I will leave it out of peewee for now.

When I read this section : http://peewee.readthedocs.org/en/latest/peewee/api.html?highlight=save#Model.save
I see the force_insert only work for the primary key, could it be updated to work with unique constraint too ?

For example if I create a sql object with a varchar field with unique constraint (and the has a duplicate) it should fallback to update to get the existing object and update it.
