Sortability of a column with a callable "data" option is inconsistent

[Michael Elsdörfer]

ModelTables only.

If a column's "data" argument is a callable object, that column will remain sortable as long as it's name still refers to a valid Django ORM field.

If however the column's "data" argument is a string that points to a callable method on the model instance (or related instances), the column will never be sortable, regardless of whether a valid ORM field is still behind it or not.

The behaviour should be the same in both cases, or the difference clearly documented. It seems most sensible to change the latter case to match the former. The relevant code that needs adjusting is in models.py:BaseModelTable._validate_column_name().

[Michael Elsdörfer (miracle2k)]

See also django-apps discussion:

http://groups.google.com/group/django-apps/msg/0da3e57249a10cdb?hl=en

[Michael Elsdörfer (miracle2k)]

Fixed in r43.