forms.py 文件源码

def nested_formset_factory(parent_model, child_model, grandchild_model):
    parent_child = inlineformset_factory(
        parent_model,
        child_model,
        formset=BaseNestedFormset,
        max_num=1,
        fields="__all__",
        widgets={'type': forms.RadioSelect(),
                 'text': forms.Textarea({'class': 'materialize-textarea'})
                 },
        extra=1,
        exclude=['help_text', 'order', ],
        can_order=True,
        can_delete=True,
    )

    parent_child.nested_formset_class = inlineformset_factory(
        child_model,
        grandchild_model,
        max_num=8,
        extra=4,
        validate_max=True,
        widgets={'text': forms.TextInput()},
        exclude=['ORDER', ],
        can_delete=True,
    )

    return parent_child

# The best link: http://yergler.net/blog/2009/09/27/nested-formsets-with-django/
# Nested formset