def construct_formset(self):
        formset = super(InlineFormSet, self).construct_formset()
        formset.model = self.inline_model
        return formset
http://trac.edgewall.org/ticket/4247
dataset/ETHPy150Open AndrewIngram/django-extra-views/extra_views/advanced.py/InlineFormSet.construct_formset--crossover with--dataset/ETHPy150Open edgewall/trac/trac/ticket/tests/model.py/ComponentTestCase.test_exists