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from django.contrib.contenttypes.forms import generic_inlineformset_factory
from extra_views.formsets import (
BaseInlineFormSetFactory,
BaseInlineFormSetView,
InlineFormSetMixin,
InlineFormSetView,
)
class BaseGenericInlineFormSetFactory(BaseInlineFormSetFactory):
"""
Base class for constructing a GenericInlineFormSet from
`generic_inlineformset_factory` in a view.
"""
def get_formset(self):
"""
Returns the final formset class from generic_inlineformset_factory.
"""
result = generic_inlineformset_factory(
self.inline_model, **self.get_factory_kwargs()
)
return result
class GenericInlineFormSetFactory(BaseGenericInlineFormSetFactory):
"""
Class used to create a `GenericInlineFormSet` from `generic_inlineformset_factory`
as one of multiple `GenericInlineFormSet`s within a single view.
Subclasses `BaseGenericInlineFormSetFactory` and passes in the necessary view
arguments.
"""
def __init__(self, parent_model, request, instance, view_kwargs=None, view=None):
self.inline_model = self.model
self.model = parent_model
self.request = request
self.object = instance
self.kwargs = view_kwargs
self.view = view
class GenericInlineFormSetMixin(BaseGenericInlineFormSetFactory, InlineFormSetMixin):
"""
A mixin that provides a way to show and handle a generic inline formset in a
request.
"""
class BaseGenericInlineFormSetView(GenericInlineFormSetMixin, BaseInlineFormSetView):
"""
A base view for displaying a generic inline formset
"""
class GenericInlineFormSetView(BaseGenericInlineFormSetView, InlineFormSetView):
"""
A view for displaying a generic inline formset for a queryset belonging to a
parent model
"""
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