robgolding

class FilterMixin(object):
    """
    View mixin which provides filtering for ListView.
    """
    filter_url_kwarg = 'filter'
    default_filter_param = None

    def get_default_filter_param(self):
        if self.default_filter_param is None:
            raise ImproperlyConfigured(

Skirmantas

This code is a suggested answer to question asked on Stackoverflow:

http://stackoverflow.com/questions/4827965/can-i-change-djangos-auth-user-username-field-to-be-100-chars-long-without-break/