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[1.5.x] Fixed #21539 -- Added example of modelformset_factory's form …

…argument

Backport of 1fa681e from master
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commit e4174da34ab239f04d9c79fec9822b01d63e453b 1 parent a53820b
@alasdairnicol alasdairnicol authored timgraham committed
Showing with 24 additions and 0 deletions.
  1. +24 −0 docs/topics/forms/modelforms.txt
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24 docs/topics/forms/modelforms.txt
@@ -646,6 +646,30 @@ instances of the model, you can specify an empty QuerySet::
>>> AuthorFormSet(queryset=Author.objects.none())
+Changing the ``form``
+---------------------
+
+By default, when you use ``modelformset_factory``, a model form will
+be created using :func:`~django.forms.models.modelform_factory`.
+Often, it can be useful to specify a custom model form. For example,
+you can create a custom model form that has custom validation::
+
+ class AuthorForm(forms.ModelForm):
+ class Meta:
+ model = Author
+ fields = ('name', 'title')
+
+ def clean_name(self):
+ # custom validation for the name field
+ ...
+
+Then, pass your model form to the factory function::
+
+ AuthorFormSet = modelformset_factory(Author, form=AuthorForm)
+
+It is not always necessary to define a custom model form. The
+``modelformset_factory`` function has several arguments which are
+passed through to ``modelform_factory``, which are described below.
Controlling which fields are used with ``fields`` and ``exclude``
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