OpenStreetMap.js error: OpenLayers.Layer.OSM is undefined

Hi, I'm working on a Django hobby project on-and-off, and it makes heavy use of GIS and OSM. The last time I worked on the project was several weeks ago. Today, I fired up Django again to do some more work on it. However, it seems that the display of OSM widgets in admin screens is now broken. On

Choices validation on model fields

x27; % (self.choice_type, self.choice_provided, '\', \''.join(self.valid_choices)) - How to test it: $ python manage.py shell >>> from bar.foo.models import Foo >>> foo1 = Foo(name='Foo Hoo', foo_type='that') (works fine, 'that&#