gistfile1.py

try:
    from south.modelsinspector import add_introspection_rules
except ImportError:
    add_introspection_rules = False

if add_introspection_rules:
    add_introspection_rules([
        (
            [UserField],
            [],
            {
             "to": ["rel.to", {'ignore_if': 'name'}],
            },
        ),
    ], [r"^threaded_multihost\.fields\.UserField"])
    add_introspection_rules([], [r"^threaded_multihost\.fields\.CreatorField"])
    add_introspection_rules([], [r"^threaded_multihost\.fields\.EditorField"])