[1.5.x] Fixed #21006 -- Added example code for overriding methods on an InlineFormSet.

            # example custom validation across forms in the formset:

            for form in self.forms:

                # your custom formset validation

                ...

Using a custom queryset

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    :ref:`Manually rendered can_delete and can_order <manually-rendered-can-delete-and-can-order>`.

Overriding ``clean()`` on an ``InlineFormSet``

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Overriding methods on an ``InlineFormSet``

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See :ref:`model-formsets-overriding-clean`, but subclass

When overriding methods on ``InlineFormSet``, you should subclass

:class:`~models.BaseInlineFormSet` rather than

:class:`~models.BaseModelFormSet`.

For example, If you want to override ``clean()``::

    from django.forms.models import BaseInlineFormSet

    class MyModelFormSet(BaseInlineFormSet):

        def clean(self):

            super(MyModelFormSet, self).clean()

            # example custom validation across forms in the formset:

            for form in self.forms:

                # your custom formset validation

                ...

See also :ref:`model-formsets-overriding-clean`.

Then when you create your inline formset, pass in the optional argument

``formset``::

    >>> from django.forms.models import inlineformset_factory

    >>> BookFormSet = inlineformset_factory(Author, Book, formset=MyModelFormSet)

    >>> author = Author.objects.get(name=u'Mike Royko')

    >>> formset = BookFormSet(instance=author)

More than one foreign key to the same model

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