diff --git a/tests/modeltests/model_formsets/models.py b/tests/modeltests/model_formsets/models.py
index 1665f62416..3eca6964d1 100644
--- a/tests/modeltests/model_formsets/models.py
+++ b/tests/modeltests/model_formsets/models.py
@@ -1,5 +1,4 @@
 import datetime
-from django import forms
 from django.db import models
 
 class Author(models.Model):
@@ -192,1039 +191,3 @@ class Post(models.Model):
 
     def __unicode__(self):
         return self.name
-
-__test__ = {'API_TESTS': """
-
->>> from datetime import date
-
->>> from django.forms.models import modelformset_factory
-
->>> qs = Author.objects.all()
->>> AuthorFormSet = modelformset_factory(Author, extra=3)
-
->>> formset = AuthorFormSet(queryset=qs)
->>> for form in formset.forms:
-...     print form.as_p()
-<p><label for="id_form-0-name">Name:</label> <input id="id_form-0-name" type="text" name="form-0-name" maxlength="100" /><input type="hidden" name="form-0-id" id="id_form-0-id" /></p>
-<p><label for="id_form-1-name">Name:</label> <input id="id_form-1-name" type="text" name="form-1-name" maxlength="100" /><input type="hidden" name="form-1-id" id="id_form-1-id" /></p>
-<p><label for="id_form-2-name">Name:</label> <input id="id_form-2-name" type="text" name="form-2-name" maxlength="100" /><input type="hidden" name="form-2-id" id="id_form-2-id" /></p>
-
->>> data = {
-...     'form-TOTAL_FORMS': '3', # the number of forms rendered
-...     'form-INITIAL_FORMS': '0', # the number of forms with initial data
-...     'form-MAX_NUM_FORMS': '', # the max number of forms
-...     'form-0-name': 'Charles Baudelaire',
-...     'form-1-name': 'Arthur Rimbaud',
-...     'form-2-name': '',
-... }
-
->>> formset = AuthorFormSet(data=data, queryset=qs)
->>> formset.is_valid()
-True
-
->>> formset.save()
-[<Author: Charles Baudelaire>, <Author: Arthur Rimbaud>]
-
->>> for author in Author.objects.order_by('name'):
-...     print author.name
-Arthur Rimbaud
-Charles Baudelaire
-
-
-Gah! We forgot Paul Verlaine. Let's create a formset to edit the existing
-authors with an extra form to add him. We *could* pass in a queryset to
-restrict the Author objects we edit, but in this case we'll use it to display
-them in alphabetical order by name.
-
->>> qs = Author.objects.order_by('name')
->>> AuthorFormSet = modelformset_factory(Author, extra=1, can_delete=False)
-
->>> formset = AuthorFormSet(queryset=qs)
->>> for form in formset.forms:
-...     print form.as_p()
-<p><label for="id_form-0-name">Name:</label> <input id="id_form-0-name" type="text" name="form-0-name" value="Arthur Rimbaud" maxlength="100" /><input type="hidden" name="form-0-id" value="2" id="id_form-0-id" /></p>
-<p><label for="id_form-1-name">Name:</label> <input id="id_form-1-name" type="text" name="form-1-name" value="Charles Baudelaire" maxlength="100" /><input type="hidden" name="form-1-id" value="1" id="id_form-1-id" /></p>
-<p><label for="id_form-2-name">Name:</label> <input id="id_form-2-name" type="text" name="form-2-name" maxlength="100" /><input type="hidden" name="form-2-id" id="id_form-2-id" /></p>
-
-
->>> data = {
-...     'form-TOTAL_FORMS': '3', # the number of forms rendered
-...     'form-INITIAL_FORMS': '2', # the number of forms with initial data
-...     'form-MAX_NUM_FORMS': '', # the max number of forms
-...     'form-0-id': '2',
-...     'form-0-name': 'Arthur Rimbaud',
-...     'form-1-id': '1',
-...     'form-1-name': 'Charles Baudelaire',
-...     'form-2-name': 'Paul Verlaine',
-... }
-
->>> formset = AuthorFormSet(data=data, queryset=qs)
->>> formset.is_valid()
-True
-
-# Only changed or new objects are returned from formset.save()
->>> formset.save()
-[<Author: Paul Verlaine>]
-
->>> for author in Author.objects.order_by('name'):
-...     print author.name
-Arthur Rimbaud
-Charles Baudelaire
-Paul Verlaine
-
-
-This probably shouldn't happen, but it will. If an add form was marked for
-deltetion, make sure we don't save that form.
-
->>> qs = Author.objects.order_by('name')
->>> AuthorFormSet = modelformset_factory(Author, extra=1, can_delete=True)
-
->>> formset = AuthorFormSet(queryset=qs)
->>> for form in formset.forms:
-...     print form.as_p()
-<p><label for="id_form-0-name">Name:</label> <input id="id_form-0-name" type="text" name="form-0-name" value="Arthur Rimbaud" maxlength="100" /></p>
-<p><label for="id_form-0-DELETE">Delete:</label> <input type="checkbox" name="form-0-DELETE" id="id_form-0-DELETE" /><input type="hidden" name="form-0-id" value="2" id="id_form-0-id" /></p>
-<p><label for="id_form-1-name">Name:</label> <input id="id_form-1-name" type="text" name="form-1-name" value="Charles Baudelaire" maxlength="100" /></p>
-<p><label for="id_form-1-DELETE">Delete:</label> <input type="checkbox" name="form-1-DELETE" id="id_form-1-DELETE" /><input type="hidden" name="form-1-id" value="1" id="id_form-1-id" /></p>
-<p><label for="id_form-2-name">Name:</label> <input id="id_form-2-name" type="text" name="form-2-name" value="Paul Verlaine" maxlength="100" /></p>
-<p><label for="id_form-2-DELETE">Delete:</label> <input type="checkbox" name="form-2-DELETE" id="id_form-2-DELETE" /><input type="hidden" name="form-2-id" value="3" id="id_form-2-id" /></p>
-<p><label for="id_form-3-name">Name:</label> <input id="id_form-3-name" type="text" name="form-3-name" maxlength="100" /></p>
-<p><label for="id_form-3-DELETE">Delete:</label> <input type="checkbox" name="form-3-DELETE" id="id_form-3-DELETE" /><input type="hidden" name="form-3-id" id="id_form-3-id" /></p>
-
->>> data = {
-...     'form-TOTAL_FORMS': '4', # the number of forms rendered
-...     'form-INITIAL_FORMS': '3', # the number of forms with initial data
-...     'form-MAX_NUM_FORMS': '', # the max number of forms
-...     'form-0-id': '2',
-...     'form-0-name': 'Arthur Rimbaud',
-...     'form-1-id': '1',
-...     'form-1-name': 'Charles Baudelaire',
-...     'form-2-id': '3',
-...     'form-2-name': 'Paul Verlaine',
-...     'form-3-name': 'Walt Whitman',
-...     'form-3-DELETE': 'on',
-... }
-
->>> formset = AuthorFormSet(data=data, queryset=qs)
->>> formset.is_valid()
-True
-
-# No objects were changed or saved so nothing will come back.
->>> formset.save()
-[]
-
->>> for author in Author.objects.order_by('name'):
-...     print author.name
-Arthur Rimbaud
-Charles Baudelaire
-Paul Verlaine
-
-Let's edit a record to ensure save only returns that one record.
-
->>> data = {
-...     'form-TOTAL_FORMS': '4', # the number of forms rendered
-...     'form-INITIAL_FORMS': '3', # the number of forms with initial data
-...     'form-MAX_NUM_FORMS': '', # the max number of forms
-...     'form-0-id': '2',
-...     'form-0-name': 'Walt Whitman',
-...     'form-1-id': '1',
-...     'form-1-name': 'Charles Baudelaire',
-...     'form-2-id': '3',
-...     'form-2-name': 'Paul Verlaine',
-...     'form-3-name': '',
-...     'form-3-DELETE': '',
-... }
-
->>> formset = AuthorFormSet(data=data, queryset=qs)
->>> formset.is_valid()
-True
-
-# One record has changed.
->>> formset.save()
-[<Author: Walt Whitman>]
-
-Test the behavior of commit=False and save_m2m
-
->>> meeting = AuthorMeeting.objects.create(created=date.today())
->>> meeting.authors = Author.objects.all()
-
-# create an Author instance to add to the meeting.
->>> new_author = Author.objects.create(name=u'John Steinbeck')
-
->>> AuthorMeetingFormSet = modelformset_factory(AuthorMeeting, extra=1, can_delete=True)
->>> data = {
-...     'form-TOTAL_FORMS': '2', # the number of forms rendered
-...     'form-INITIAL_FORMS': '1', # the number of forms with initial data
-...     'form-MAX_NUM_FORMS': '', # the max number of forms
-...     'form-0-id': '1',
-...     'form-0-name': '2nd Tuesday of the Week Meeting',
-...     'form-0-authors': [2, 1, 3, 4],
-...     'form-1-name': '',
-...     'form-1-authors': '',
-...     'form-1-DELETE': '',
-... }
->>> formset = AuthorMeetingFormSet(data=data, queryset=AuthorMeeting.objects.all())
->>> formset.is_valid()
-True
->>> instances = formset.save(commit=False)
->>> for instance in instances:
-...     instance.created = date.today()
-...     instance.save()
->>> formset.save_m2m()
->>> instances[0].authors.all()
-[<Author: Charles Baudelaire>, <Author: John Steinbeck>, <Author: Paul Verlaine>, <Author: Walt Whitman>]
-
-# delete the author we created to allow later tests to continue working.
->>> new_author.delete()
-
-Test the behavior of max_num with model formsets. It should allow all existing
-related objects/inlines for a given object to be displayed, but not allow
-the creation of new inlines beyond max_num.
-
->>> qs = Author.objects.order_by('name')
-
->>> AuthorFormSet = modelformset_factory(Author, max_num=None, extra=3)
->>> formset = AuthorFormSet(queryset=qs)
->>> len(formset.forms)
-6
->>> len(formset.extra_forms)
-3
-
->>> AuthorFormSet = modelformset_factory(Author, max_num=4, extra=3)
->>> formset = AuthorFormSet(queryset=qs)
->>> len(formset.forms)
-4
->>> len(formset.extra_forms)
-1
-
->>> AuthorFormSet = modelformset_factory(Author, max_num=0, extra=3)
->>> formset = AuthorFormSet(queryset=qs)
->>> len(formset.forms)
-3
->>> len(formset.extra_forms)
-0
-
->>> AuthorFormSet = modelformset_factory(Author, max_num=None)
->>> formset = AuthorFormSet(queryset=qs)
->>> [x.name for x in formset.get_queryset()]
-[u'Charles Baudelaire', u'Paul Verlaine', u'Walt Whitman']
-
->>> AuthorFormSet = modelformset_factory(Author, max_num=0)
->>> formset = AuthorFormSet(queryset=qs)
->>> [x.name for x in formset.get_queryset()]
-[u'Charles Baudelaire', u'Paul Verlaine', u'Walt Whitman']
-
->>> AuthorFormSet = modelformset_factory(Author, max_num=4)
->>> formset = AuthorFormSet(queryset=qs)
->>> [x.name for x in formset.get_queryset()]
-[u'Charles Baudelaire', u'Paul Verlaine', u'Walt Whitman']
-
-
-# ModelForm with a custom save method in a formset ###########################
-
->>> class PoetForm(forms.ModelForm):
-...     def save(self, commit=True):
-...         # change the name to "Vladimir Mayakovsky" just to be a jerk.
-...         author = super(PoetForm, self).save(commit=False)
-...         author.name = u"Vladimir Mayakovsky"
-...         if commit:
-...             author.save()
-...         return author
-
->>> PoetFormSet = modelformset_factory(Poet, form=PoetForm)
-
->>> data = {
-...     'form-TOTAL_FORMS': '3', # the number of forms rendered
-...     'form-INITIAL_FORMS': '0', # the number of forms with initial data
-...     'form-MAX_NUM_FORMS': '', # the max number of forms
-...     'form-0-name': 'Walt Whitman',
-...     'form-1-name': 'Charles Baudelaire',
-...     'form-2-name': '',
-... }
-
->>> qs = Poet.objects.all()
->>> formset = PoetFormSet(data=data, queryset=qs)
->>> formset.is_valid()
-True
-
->>> formset.save()
-[<Poet: Vladimir Mayakovsky>, <Poet: Vladimir Mayakovsky>]
-
-
-# Model inheritance in model formsets ########################################
-
->>> BetterAuthorFormSet = modelformset_factory(BetterAuthor)
->>> formset = BetterAuthorFormSet()
->>> for form in formset.forms:
-...     print form.as_p()
-<p><label for="id_form-0-name">Name:</label> <input id="id_form-0-name" type="text" name="form-0-name" maxlength="100" /></p>
-<p><label for="id_form-0-write_speed">Write speed:</label> <input type="text" name="form-0-write_speed" id="id_form-0-write_speed" /><input type="hidden" name="form-0-author_ptr" id="id_form-0-author_ptr" /></p>
-
->>> data = {
-...     'form-TOTAL_FORMS': '1', # the number of forms rendered
-...     'form-INITIAL_FORMS': '0', # the number of forms with initial data
-...     'form-MAX_NUM_FORMS': '', # the max number of forms
-...     'form-0-author_ptr': '',
-...     'form-0-name': 'Ernest Hemingway',
-...     'form-0-write_speed': '10',
-... }
-
->>> formset = BetterAuthorFormSet(data)
->>> formset.is_valid()
-True
->>> formset.save()
-[<BetterAuthor: Ernest Hemingway>]
->>> hemingway_id = BetterAuthor.objects.get(name="Ernest Hemingway").pk
-
->>> formset = BetterAuthorFormSet()
->>> for form in formset.forms:
-...     print form.as_p()
-<p><label for="id_form-0-name">Name:</label> <input id="id_form-0-name" type="text" name="form-0-name" value="Ernest Hemingway" maxlength="100" /></p>
-<p><label for="id_form-0-write_speed">Write speed:</label> <input type="text" name="form-0-write_speed" value="10" id="id_form-0-write_speed" /><input type="hidden" name="form-0-author_ptr" value="..." id="id_form-0-author_ptr" /></p>
-<p><label for="id_form-1-name">Name:</label> <input id="id_form-1-name" type="text" name="form-1-name" maxlength="100" /></p>
-<p><label for="id_form-1-write_speed">Write speed:</label> <input type="text" name="form-1-write_speed" id="id_form-1-write_speed" /><input type="hidden" name="form-1-author_ptr" id="id_form-1-author_ptr" /></p>
-
->>> data = {
-...     'form-TOTAL_FORMS': '2', # the number of forms rendered
-...     'form-INITIAL_FORMS': '1', # the number of forms with initial data
-...     'form-MAX_NUM_FORMS': '', # the max number of forms
-...     'form-0-author_ptr': hemingway_id,
-...     'form-0-name': 'Ernest Hemingway',
-...     'form-0-write_speed': '10',
-...     'form-1-author_ptr': '',
-...     'form-1-name': '',
-...     'form-1-write_speed': '',
-... }
-
->>> formset = BetterAuthorFormSet(data)
->>> formset.is_valid()
-True
->>> formset.save()
-[]
-
-# Inline Formsets ############################################################
-
-We can also create a formset that is tied to a parent model. This is how the
-admin system's edit inline functionality works.
-
->>> from django.forms.models import inlineformset_factory
-
->>> AuthorBooksFormSet = inlineformset_factory(Author, Book, can_delete=False, extra=3)
->>> author = Author.objects.get(name='Charles Baudelaire')
-
->>> formset = AuthorBooksFormSet(instance=author)
->>> for form in formset.forms:
-...     print form.as_p()
-<p><label for="id_book_set-0-title">Title:</label> <input id="id_book_set-0-title" type="text" name="book_set-0-title" maxlength="100" /><input type="hidden" name="book_set-0-author" value="1" id="id_book_set-0-author" /><input type="hidden" name="book_set-0-id" id="id_book_set-0-id" /></p>
-<p><label for="id_book_set-1-title">Title:</label> <input id="id_book_set-1-title" type="text" name="book_set-1-title" maxlength="100" /><input type="hidden" name="book_set-1-author" value="1" id="id_book_set-1-author" /><input type="hidden" name="book_set-1-id" id="id_book_set-1-id" /></p>
-<p><label for="id_book_set-2-title">Title:</label> <input id="id_book_set-2-title" type="text" name="book_set-2-title" maxlength="100" /><input type="hidden" name="book_set-2-author" value="1" id="id_book_set-2-author" /><input type="hidden" name="book_set-2-id" id="id_book_set-2-id" /></p>
-
->>> data = {
-...     'book_set-TOTAL_FORMS': '3', # the number of forms rendered
-...     'book_set-INITIAL_FORMS': '0', # the number of forms with initial data
-...     'book_set-MAX_NUM_FORMS': '', # the max number of forms
-...     'book_set-0-title': 'Les Fleurs du Mal',
-...     'book_set-1-title': '',
-...     'book_set-2-title': '',
-... }
-
->>> formset = AuthorBooksFormSet(data, instance=author)
->>> formset.is_valid()
-True
-
->>> formset.save()
-[<Book: Les Fleurs du Mal>]
-
->>> for book in author.book_set.all():
-...     print book.title
-Les Fleurs du Mal
-
-
-Now that we've added a book to Charles Baudelaire, let's try adding another
-one. This time though, an edit form will be available for every existing
-book.
-
->>> AuthorBooksFormSet = inlineformset_factory(Author, Book, can_delete=False, extra=2)
->>> author = Author.objects.get(name='Charles Baudelaire')
-
->>> formset = AuthorBooksFormSet(instance=author)
->>> for form in formset.forms:
-...     print form.as_p()
-<p><label for="id_book_set-0-title">Title:</label> <input id="id_book_set-0-title" type="text" name="book_set-0-title" value="Les Fleurs du Mal" maxlength="100" /><input type="hidden" name="book_set-0-author" value="1" id="id_book_set-0-author" /><input type="hidden" name="book_set-0-id" value="1" id="id_book_set-0-id" /></p>
-<p><label for="id_book_set-1-title">Title:</label> <input id="id_book_set-1-title" type="text" name="book_set-1-title" maxlength="100" /><input type="hidden" name="book_set-1-author" value="1" id="id_book_set-1-author" /><input type="hidden" name="book_set-1-id" id="id_book_set-1-id" /></p>
-<p><label for="id_book_set-2-title">Title:</label> <input id="id_book_set-2-title" type="text" name="book_set-2-title" maxlength="100" /><input type="hidden" name="book_set-2-author" value="1" id="id_book_set-2-author" /><input type="hidden" name="book_set-2-id" id="id_book_set-2-id" /></p>
-
->>> data = {
-...     'book_set-TOTAL_FORMS': '3', # the number of forms rendered
-...     'book_set-INITIAL_FORMS': '1', # the number of forms with initial data
-...     'book_set-MAX_NUM_FORMS': '', # the max number of forms
-...     'book_set-0-id': '1',
-...     'book_set-0-title': 'Les Fleurs du Mal',
-...     'book_set-1-title': 'Les Paradis Artificiels',
-...     'book_set-2-title': '',
-... }
-
->>> formset = AuthorBooksFormSet(data, instance=author)
->>> formset.is_valid()
-True
-
->>> formset.save()
-[<Book: Les Paradis Artificiels>]
-
-As you can see, 'Les Paradis Artificiels' is now a book belonging to Charles Baudelaire.
-
->>> for book in author.book_set.order_by('id'):
-...     print book.title
-Les Fleurs du Mal
-Les Paradis Artificiels
-
-The save_as_new parameter lets you re-associate the data to a new instance.
-This is used in the admin for save_as functionality.
-
->>> data = {
-...     'book_set-TOTAL_FORMS': '3', # the number of forms rendered
-...     'book_set-INITIAL_FORMS': '2', # the number of forms with initial data
-...     'book_set-MAX_NUM_FORMS': '', # the max number of forms
-...     'book_set-0-id': '1',
-...     'book_set-0-title': 'Les Fleurs du Mal',
-...     'book_set-1-id': '2',
-...     'book_set-1-title': 'Les Paradis Artificiels',
-...     'book_set-2-title': '',
-... }
-
->>> formset = AuthorBooksFormSet(data, instance=Author(), save_as_new=True)
->>> formset.is_valid()
-True
-
->>> new_author = Author.objects.create(name='Charles Baudelaire')
->>> formset = AuthorBooksFormSet(data, instance=new_author, save_as_new=True)
->>> [book for book in formset.save() if book.author.pk == new_author.pk]
-[<Book: Les Fleurs du Mal>, <Book: Les Paradis Artificiels>]
-
-Test using a custom prefix on an inline formset.
-
->>> formset = AuthorBooksFormSet(prefix="test")
->>> for form in formset.forms:
-...     print form.as_p()
-<p><label for="id_test-0-title">Title:</label> <input id="id_test-0-title" type="text" name="test-0-title" maxlength="100" /><input type="hidden" name="test-0-author" id="id_test-0-author" /><input type="hidden" name="test-0-id" id="id_test-0-id" /></p>
-<p><label for="id_test-1-title">Title:</label> <input id="id_test-1-title" type="text" name="test-1-title" maxlength="100" /><input type="hidden" name="test-1-author" id="id_test-1-author" /><input type="hidden" name="test-1-id" id="id_test-1-id" /></p>
-
-Test inline formsets where the inline-edited object has a custom primary key that is not the fk to the parent object.
-
->>> AuthorBooksFormSet2 = inlineformset_factory(Author, BookWithCustomPK, can_delete=False, extra=1)
-
->>> formset = AuthorBooksFormSet2(instance=author)
->>> for form in formset.forms:
-...     print form.as_p()
-<p><label for="id_bookwithcustompk_set-0-my_pk">My pk:</label> <input type="text" name="bookwithcustompk_set-0-my_pk" id="id_bookwithcustompk_set-0-my_pk" /></p>
-    <p><label for="id_bookwithcustompk_set-0-title">Title:</label> <input id="id_bookwithcustompk_set-0-title" type="text" name="bookwithcustompk_set-0-title" maxlength="100" /><input type="hidden" name="bookwithcustompk_set-0-author" value="1" id="id_bookwithcustompk_set-0-author" /></p>
-
->>> data = {
-...     'bookwithcustompk_set-TOTAL_FORMS': '1', # the number of forms rendered
-...     'bookwithcustompk_set-INITIAL_FORMS': '0', # the number of forms with initial data
-...     'bookwithcustompk_set-MAX_NUM_FORMS': '', # the max number of forms
-...     'bookwithcustompk_set-0-my_pk': '77777',
-...     'bookwithcustompk_set-0-title': 'Les Fleurs du Mal',
-... }
-
->>> formset = AuthorBooksFormSet2(data, instance=author)
->>> formset.is_valid()
-True
-
->>> formset.save()
-[<BookWithCustomPK: 77777: Les Fleurs du Mal>]
-
->>> for book in author.bookwithcustompk_set.all():
-...     print book.title
-Les Fleurs du Mal
-
-Test inline formsets where the inline-edited object uses multi-table inheritance, thus
-has a non AutoField yet auto-created primary key.
-
->>> AuthorBooksFormSet3 = inlineformset_factory(Author, AlternateBook, can_delete=False, extra=1)
-
->>> formset = AuthorBooksFormSet3(instance=author)
->>> for form in formset.forms:
-...     print form.as_p()
-<p><label for="id_alternatebook_set-0-title">Title:</label> <input id="id_alternatebook_set-0-title" type="text" name="alternatebook_set-0-title" maxlength="100" /></p>
-    <p><label for="id_alternatebook_set-0-notes">Notes:</label> <input id="id_alternatebook_set-0-notes" type="text" name="alternatebook_set-0-notes" maxlength="100" /><input type="hidden" name="alternatebook_set-0-author" value="1" id="id_alternatebook_set-0-author" /><input type="hidden" name="alternatebook_set-0-book_ptr" id="id_alternatebook_set-0-book_ptr" /></p>
-
-
->>> data = {
-...     'alternatebook_set-TOTAL_FORMS': '1', # the number of forms rendered
-...     'alternatebook_set-INITIAL_FORMS': '0', # the number of forms with initial data
-...     'alternatebook_set-MAX_NUM_FORMS': '', # the max number of forms
-...     'alternatebook_set-0-title': 'Flowers of Evil',
-...     'alternatebook_set-0-notes': 'English translation of Les Fleurs du Mal'
-... }
-
->>> formset = AuthorBooksFormSet3(data, instance=author)
->>> formset.is_valid()
-True
-
->>> formset.save()
-[<AlternateBook: Flowers of Evil - English translation of Les Fleurs du Mal>]
-
-Test inline formsets where the inline-edited object has a unique_together constraint with a nullable member
-
->>> AuthorBooksFormSet4 = inlineformset_factory(Author, BookWithOptionalAltEditor, can_delete=False, extra=2)
-
->>> data = {
-...     'bookwithoptionalalteditor_set-TOTAL_FORMS': '2', # the number of forms rendered
-...     'bookwithoptionalalteditor_set-INITIAL_FORMS': '0', # the number of forms with initial data
-...     'bookwithoptionalalteditor_set-MAX_NUM_FORMS': '', # the max number of forms
-...     'bookwithoptionalalteditor_set-0-author': '1',
-...     'bookwithoptionalalteditor_set-0-title': 'Les Fleurs du Mal',
-...     'bookwithoptionalalteditor_set-1-author': '1',
-...     'bookwithoptionalalteditor_set-1-title': 'Les Fleurs du Mal',
-... }
->>> formset = AuthorBooksFormSet4(data, instance=author)
->>> formset.is_valid()
-True
-
->>> formset.save()
-[<BookWithOptionalAltEditor: Les Fleurs du Mal>, <BookWithOptionalAltEditor: Les Fleurs du Mal>]
-
-
-# ModelForm with a custom save method in an inline formset ###################
-
->>> class PoemForm(forms.ModelForm):
-...     def save(self, commit=True):
-...         # change the name to "Brooklyn Bridge" just to be a jerk.
-...         poem = super(PoemForm, self).save(commit=False)
-...         poem.name = u"Brooklyn Bridge"
-...         if commit:
-...             poem.save()
-...         return poem
-
->>> PoemFormSet = inlineformset_factory(Poet, Poem, form=PoemForm)
-
->>> data = {
-...     'poem_set-TOTAL_FORMS': '3', # the number of forms rendered
-...     'poem_set-INITIAL_FORMS': '0', # the number of forms with initial data
-...     'poem_set-MAX_NUM_FORMS': '', # the max number of forms
-...     'poem_set-0-name': 'The Cloud in Trousers',
-...     'poem_set-1-name': 'I',
-...     'poem_set-2-name': '',
-... }
-
->>> poet = Poet.objects.create(name='Vladimir Mayakovsky')
->>> formset = PoemFormSet(data=data, instance=poet)
->>> formset.is_valid()
-True
-
->>> formset.save()
-[<Poem: Brooklyn Bridge>, <Poem: Brooklyn Bridge>]
-
-We can provide a custom queryset to our InlineFormSet:
-
->>> custom_qs = Book.objects.order_by('-title')
->>> formset = AuthorBooksFormSet(instance=author, queryset=custom_qs)
->>> for form in formset.forms:
-...     print form.as_p()
-<p><label for="id_book_set-0-title">Title:</label> <input id="id_book_set-0-title" type="text" name="book_set-0-title" value="Les Paradis Artificiels" maxlength="100" /><input type="hidden" name="book_set-0-author" value="1" id="id_book_set-0-author" /><input type="hidden" name="book_set-0-id" value="2" id="id_book_set-0-id" /></p>
-<p><label for="id_book_set-1-title">Title:</label> <input id="id_book_set-1-title" type="text" name="book_set-1-title" value="Les Fleurs du Mal" maxlength="100" /><input type="hidden" name="book_set-1-author" value="1" id="id_book_set-1-author" /><input type="hidden" name="book_set-1-id" value="1" id="id_book_set-1-id" /></p>
-<p><label for="id_book_set-2-title">Title:</label> <input id="id_book_set-2-title" type="text" name="book_set-2-title" value="Flowers of Evil" maxlength="100" /><input type="hidden" name="book_set-2-author" value="1" id="id_book_set-2-author" /><input type="hidden" name="book_set-2-id" value="5" id="id_book_set-2-id" /></p>
-<p><label for="id_book_set-3-title">Title:</label> <input id="id_book_set-3-title" type="text" name="book_set-3-title" maxlength="100" /><input type="hidden" name="book_set-3-author" value="1" id="id_book_set-3-author" /><input type="hidden" name="book_set-3-id" id="id_book_set-3-id" /></p>
-<p><label for="id_book_set-4-title">Title:</label> <input id="id_book_set-4-title" type="text" name="book_set-4-title" maxlength="100" /><input type="hidden" name="book_set-4-author" value="1" id="id_book_set-4-author" /><input type="hidden" name="book_set-4-id" id="id_book_set-4-id" /></p>
-
->>> data = {
-...     'book_set-TOTAL_FORMS': '5', # the number of forms rendered
-...     'book_set-INITIAL_FORMS': '3', # the number of forms with initial data
-...     'book_set-MAX_NUM_FORMS': '', # the max number of forms
-...     'book_set-0-id': '1',
-...     'book_set-0-title': 'Les Fleurs du Mal',
-...     'book_set-1-id': '2',
-...     'book_set-1-title': 'Les Paradis Artificiels',
-...     'book_set-2-id': '5',
-...     'book_set-2-title': 'Flowers of Evil',
-...     'book_set-3-title': 'Revue des deux mondes',
-...     'book_set-4-title': '',
-... }
->>> formset = AuthorBooksFormSet(data, instance=author, queryset=custom_qs)
->>> formset.is_valid()
-True
-
->>> custom_qs = Book.objects.filter(title__startswith='F')
->>> formset = AuthorBooksFormSet(instance=author, queryset=custom_qs)
->>> for form in formset.forms:
-...     print form.as_p()
-<p><label for="id_book_set-0-title">Title:</label> <input id="id_book_set-0-title" type="text" name="book_set-0-title" value="Flowers of Evil" maxlength="100" /><input type="hidden" name="book_set-0-author" value="1" id="id_book_set-0-author" /><input type="hidden" name="book_set-0-id" value="5" id="id_book_set-0-id" /></p>
-<p><label for="id_book_set-1-title">Title:</label> <input id="id_book_set-1-title" type="text" name="book_set-1-title" maxlength="100" /><input type="hidden" name="book_set-1-author" value="1" id="id_book_set-1-author" /><input type="hidden" name="book_set-1-id" id="id_book_set-1-id" /></p>
-<p><label for="id_book_set-2-title">Title:</label> <input id="id_book_set-2-title" type="text" name="book_set-2-title" maxlength="100" /><input type="hidden" name="book_set-2-author" value="1" id="id_book_set-2-author" /><input type="hidden" name="book_set-2-id" id="id_book_set-2-id" /></p>
->>> data = {
-...     'book_set-TOTAL_FORMS': '3', # the number of forms rendered
-...     'book_set-INITIAL_FORMS': '1', # the number of forms with initial data
-...     'book_set-MAX_NUM_FORMS': '', # the max number of forms
-...     'book_set-0-id': '5',
-...     'book_set-0-title': 'Flowers of Evil',
-...     'book_set-1-title': 'Revue des deux mondes',
-...     'book_set-2-title': '',
-... }
->>> formset = AuthorBooksFormSet(data, instance=author, queryset=custom_qs)
->>> formset.is_valid()
-True
-
-
-# Test a custom primary key ###################################################
-
-We need to ensure that it is displayed
-
->>> CustomPrimaryKeyFormSet = modelformset_factory(CustomPrimaryKey)
->>> formset = CustomPrimaryKeyFormSet()
->>> for form in formset.forms:
-...     print form.as_p()
-<p><label for="id_form-0-my_pk">My pk:</label> <input id="id_form-0-my_pk" type="text" name="form-0-my_pk" maxlength="10" /></p>
-<p><label for="id_form-0-some_field">Some field:</label> <input id="id_form-0-some_field" type="text" name="form-0-some_field" maxlength="100" /></p>
-
-# Custom primary keys with ForeignKey, OneToOneField and AutoField ############
-
->>> place = Place(name=u'Giordanos', city=u'Chicago')
->>> place.save()
-
->>> FormSet = inlineformset_factory(Place, Owner, extra=2, can_delete=False)
->>> formset = FormSet(instance=place)
->>> for form in formset.forms:
-...     print form.as_p()
-<p><label for="id_owner_set-0-name">Name:</label> <input id="id_owner_set-0-name" type="text" name="owner_set-0-name" maxlength="100" /><input type="hidden" name="owner_set-0-place" value="1" id="id_owner_set-0-place" /><input type="hidden" name="owner_set-0-auto_id" id="id_owner_set-0-auto_id" /></p>
-<p><label for="id_owner_set-1-name">Name:</label> <input id="id_owner_set-1-name" type="text" name="owner_set-1-name" maxlength="100" /><input type="hidden" name="owner_set-1-place" value="1" id="id_owner_set-1-place" /><input type="hidden" name="owner_set-1-auto_id" id="id_owner_set-1-auto_id" /></p>
-
->>> data = {
-...     'owner_set-TOTAL_FORMS': '2',
-...     'owner_set-INITIAL_FORMS': '0',
-...     'owner_set-MAX_NUM_FORMS': '',
-...     'owner_set-0-auto_id': '',
-...     'owner_set-0-name': u'Joe Perry',
-...     'owner_set-1-auto_id': '',
-...     'owner_set-1-name': '',
-... }
->>> formset = FormSet(data, instance=place)
->>> formset.is_valid()
-True
->>> formset.save()
-[<Owner: Joe Perry at Giordanos>]
-
->>> formset = FormSet(instance=place)
->>> for form in formset.forms:
-...     print form.as_p()
-<p><label for="id_owner_set-0-name">Name:</label> <input id="id_owner_set-0-name" type="text" name="owner_set-0-name" value="Joe Perry" maxlength="100" /><input type="hidden" name="owner_set-0-place" value="1" id="id_owner_set-0-place" /><input type="hidden" name="owner_set-0-auto_id" value="1" id="id_owner_set-0-auto_id" /></p>
-<p><label for="id_owner_set-1-name">Name:</label> <input id="id_owner_set-1-name" type="text" name="owner_set-1-name" maxlength="100" /><input type="hidden" name="owner_set-1-place" value="1" id="id_owner_set-1-place" /><input type="hidden" name="owner_set-1-auto_id" id="id_owner_set-1-auto_id" /></p>
-<p><label for="id_owner_set-2-name">Name:</label> <input id="id_owner_set-2-name" type="text" name="owner_set-2-name" maxlength="100" /><input type="hidden" name="owner_set-2-place" value="1" id="id_owner_set-2-place" /><input type="hidden" name="owner_set-2-auto_id" id="id_owner_set-2-auto_id" /></p>
-
->>> data = {
-...     'owner_set-TOTAL_FORMS': '3',
-...     'owner_set-INITIAL_FORMS': '1',
-...     'owner_set-MAX_NUM_FORMS': '',
-...     'owner_set-0-auto_id': u'1',
-...     'owner_set-0-name': u'Joe Perry',
-...     'owner_set-1-auto_id': '',
-...     'owner_set-1-name': u'Jack Berry',
-...     'owner_set-2-auto_id': '',
-...     'owner_set-2-name': '',
-... }
->>> formset = FormSet(data, instance=place)
->>> formset.is_valid()
-True
->>> formset.save()
-[<Owner: Jack Berry at Giordanos>]
-
-# Ensure a custom primary key that is a ForeignKey or OneToOneField get rendered for the user to choose.
-
->>> FormSet = modelformset_factory(OwnerProfile)
->>> formset = FormSet()
->>> for form in formset.forms:
-...     print form.as_p()
-<p><label for="id_form-0-owner">Owner:</label> <select name="form-0-owner" id="id_form-0-owner">
-<option value="" selected="selected">---------</option>
-<option value="1">Joe Perry at Giordanos</option>
-<option value="2">Jack Berry at Giordanos</option>
-</select></p>
-<p><label for="id_form-0-age">Age:</label> <input type="text" name="form-0-age" id="id_form-0-age" /></p>
-
->>> owner = Owner.objects.get(name=u'Joe Perry')
->>> FormSet = inlineformset_factory(Owner, OwnerProfile, max_num=1, can_delete=False)
->>> FormSet.max_num
-1
->>> formset = FormSet(instance=owner)
->>> for form in formset.forms:
-...     print form.as_p()
-<p><label for="id_ownerprofile-0-age">Age:</label> <input type="text" name="ownerprofile-0-age" id="id_ownerprofile-0-age" /><input type="hidden" name="ownerprofile-0-owner" value="1" id="id_ownerprofile-0-owner" /></p>
-
->>> data = {
-...     'ownerprofile-TOTAL_FORMS': '1',
-...     'ownerprofile-INITIAL_FORMS': '0',
-...     'ownerprofile-MAX_NUM_FORMS': '1',
-...     'ownerprofile-0-owner': '',
-...     'ownerprofile-0-age': u'54',
-... }
->>> formset = FormSet(data, instance=owner)
->>> formset.is_valid()
-True
->>> formset.save()
-[<OwnerProfile: Joe Perry is 54>]
->>> formset = FormSet(instance=owner)
->>> for form in formset.forms:
-...     print form.as_p()
-<p><label for="id_ownerprofile-0-age">Age:</label> <input type="text" name="ownerprofile-0-age" value="54" id="id_ownerprofile-0-age" /><input type="hidden" name="ownerprofile-0-owner" value="1" id="id_ownerprofile-0-owner" /></p>
-
->>> data = {
-...     'ownerprofile-TOTAL_FORMS': '1',
-...     'ownerprofile-INITIAL_FORMS': '1',
-...     'ownerprofile-MAX_NUM_FORMS': '1',
-...     'ownerprofile-0-owner': u'1',
-...     'ownerprofile-0-age': u'55',
-... }
->>> formset = FormSet(data, instance=owner)
->>> formset.is_valid()
-True
->>> formset.save()
-[<OwnerProfile: Joe Perry is 55>]
-
-# ForeignKey with unique=True should enforce max_num=1
-
->>> FormSet = inlineformset_factory(Place, Location, can_delete=False)
->>> FormSet.max_num
-1
->>> formset = FormSet(instance=place)
->>> for form in formset.forms:
-...     print form.as_p()
-<p><label for="id_location_set-0-lat">Lat:</label> <input id="id_location_set-0-lat" type="text" name="location_set-0-lat" maxlength="100" /></p>
-<p><label for="id_location_set-0-lon">Lon:</label> <input id="id_location_set-0-lon" type="text" name="location_set-0-lon" maxlength="100" /><input type="hidden" name="location_set-0-place" value="1" id="id_location_set-0-place" /><input type="hidden" name="location_set-0-id" id="id_location_set-0-id" /></p>
-
-# Foreign keys in parents ########################################
-
->>> from django.forms.models import _get_foreign_key
-
->>> type(_get_foreign_key(Restaurant, Owner))
-<class 'django.db.models.fields.related.ForeignKey'>
->>> type(_get_foreign_key(MexicanRestaurant, Owner))
-<class 'django.db.models.fields.related.ForeignKey'>
-
-# unique/unique_together validation ###########################################
-
->>> FormSet = modelformset_factory(Product, extra=1)
->>> data = {
-...     'form-TOTAL_FORMS': '1',
-...     'form-INITIAL_FORMS': '0',
-...     'form-MAX_NUM_FORMS': '',
-...     'form-0-slug': 'car-red',
-... }
->>> formset = FormSet(data)
->>> formset.is_valid()
-True
->>> formset.save()
-[<Product: car-red>]
-
->>> data = {
-...     'form-TOTAL_FORMS': '1',
-...     'form-INITIAL_FORMS': '0',
-...     'form-MAX_NUM_FORMS': '',
-...     'form-0-slug': 'car-red',
-... }
->>> formset = FormSet(data)
->>> formset.is_valid()
-False
->>> formset.errors
-[{'slug': [u'Product with this Slug already exists.']}]
-
-# unique_together
-
->>> FormSet = modelformset_factory(Price, extra=1)
->>> data = {
-...     'form-TOTAL_FORMS': '1',
-...     'form-INITIAL_FORMS': '0',
-...     'form-MAX_NUM_FORMS': '',
-...     'form-0-price': u'12.00',
-...     'form-0-quantity': '1',
-... }
->>> formset = FormSet(data)
->>> formset.is_valid()
-True
->>> formset.save()
-[<Price: 1 for 12.00>]
-
->>> data = {
-...     'form-TOTAL_FORMS': '1',
-...     'form-INITIAL_FORMS': '0',
-...     'form-MAX_NUM_FORMS': '',
-...     'form-0-price': u'12.00',
-...     'form-0-quantity': '1',
-... }
->>> formset = FormSet(data)
->>> formset.is_valid()
-False
->>> formset.errors
-[{'__all__': [u'Price with this Price and Quantity already exists.']}]
-
-# unique_together with inlineformset_factory
-# Also see bug #8882.
-
->>> repository = Repository.objects.create(name=u'Test Repo')
->>> FormSet = inlineformset_factory(Repository, Revision, extra=1)
->>> data = {
-...     'revision_set-TOTAL_FORMS': '1',
-...     'revision_set-INITIAL_FORMS': '0',
-...     'revision_set-MAX_NUM_FORMS': '',
-...     'revision_set-0-repository': repository.pk,
-...     'revision_set-0-revision': '146239817507f148d448db38840db7c3cbf47c76',
-...     'revision_set-0-DELETE': '',
-... }
->>> formset = FormSet(data, instance=repository)
->>> formset.is_valid()
-True
->>> formset.save()
-[<Revision: 146239817507f148d448db38840db7c3cbf47c76 (Test Repo)>]
-
-# attempt to save the same revision against against the same repo.
->>> data = {
-...     'revision_set-TOTAL_FORMS': '1',
-...     'revision_set-INITIAL_FORMS': '0',
-...     'revision_set-MAX_NUM_FORMS': '',
-...     'revision_set-0-repository': repository.pk,
-...     'revision_set-0-revision': '146239817507f148d448db38840db7c3cbf47c76',
-...     'revision_set-0-DELETE': '',
-... }
->>> formset = FormSet(data, instance=repository)
->>> formset.is_valid()
-False
->>> formset.errors
-[{'__all__': [u'Revision with this Repository and Revision already exists.']}]
-
-# unique_together with inlineformset_factory with overridden form fields
-# Also see #9494
-
->>> FormSet = inlineformset_factory(Repository, Revision, fields=('revision',), extra=1)
->>> data = {
-...     'revision_set-TOTAL_FORMS': '1',
-...     'revision_set-INITIAL_FORMS': '0',
-...     'revision_set-MAX_NUM_FORMS': '',
-...     'revision_set-0-repository': repository.pk,
-...     'revision_set-0-revision': '146239817507f148d448db38840db7c3cbf47c76',
-...     'revision_set-0-DELETE': '',
-... }
->>> formset = FormSet(data, instance=repository)
->>> formset.is_valid()
-False
-
-# Use of callable defaults (see bug #7975).
-
->>> person = Person.objects.create(name='Ringo')
->>> FormSet = inlineformset_factory(Person, Membership, can_delete=False, extra=1)
->>> formset = FormSet(instance=person)
-
-# Django will render a hidden field for model fields that have a callable
-# default. This is required to ensure the value is tested for change correctly
-# when determine what extra forms have changed to save.
-
->>> form = formset.forms[0] # this formset only has one form
->>> now = form.fields['date_joined'].initial()
->>> print form.as_p()
-<p><label for="id_membership_set-0-date_joined">Date joined:</label> <input type="text" name="membership_set-0-date_joined" value="..." id="id_membership_set-0-date_joined" /><input type="hidden" name="initial-membership_set-0-date_joined" value="..." id="initial-membership_set-0-id_membership_set-0-date_joined" /></p>
-<p><label for="id_membership_set-0-karma">Karma:</label> <input type="text" name="membership_set-0-karma" id="id_membership_set-0-karma" /><input type="hidden" name="membership_set-0-person" value="1" id="id_membership_set-0-person" /><input type="hidden" name="membership_set-0-id" id="id_membership_set-0-id" /></p>
-
-# test for validation with callable defaults. Validations rely on hidden fields
-
->>> data = {
-...     'membership_set-TOTAL_FORMS': '1',
-...     'membership_set-INITIAL_FORMS': '0',
-...     'membership_set-MAX_NUM_FORMS': '',
-...     'membership_set-0-date_joined': unicode(now.strftime('%Y-%m-%d %H:%M:%S')),
-...     'initial-membership_set-0-date_joined': unicode(now.strftime('%Y-%m-%d %H:%M:%S')),
-...     'membership_set-0-karma': '',
-... }
->>> formset = FormSet(data, instance=person)
->>> formset.is_valid()
-True
-
-# now test for when the data changes
-
->>> one_day_later = now + datetime.timedelta(days=1)
->>> filled_data = {
-...     'membership_set-TOTAL_FORMS': '1',
-...     'membership_set-INITIAL_FORMS': '0',
-...     'membership_set-MAX_NUM_FORMS': '',
-...     'membership_set-0-date_joined': unicode(one_day_later.strftime('%Y-%m-%d %H:%M:%S')),
-...     'initial-membership_set-0-date_joined': unicode(now.strftime('%Y-%m-%d %H:%M:%S')),
-...     'membership_set-0-karma': '',
-... }
->>> formset = FormSet(filled_data, instance=person)
->>> formset.is_valid()
-False
-
-# now test with split datetime fields
-
->>> class MembershipForm(forms.ModelForm):
-...     date_joined = forms.SplitDateTimeField(initial=now)
-...     class Meta:
-...         model = Membership
-...     def __init__(self, **kwargs):
-...         super(MembershipForm, self).__init__(**kwargs)
-...         self.fields['date_joined'].widget = forms.SplitDateTimeWidget()
-
->>> FormSet = inlineformset_factory(Person, Membership, form=MembershipForm, can_delete=False, extra=1)
->>> data = {
-...     'membership_set-TOTAL_FORMS': '1',
-...     'membership_set-INITIAL_FORMS': '0',
-...     'membership_set-MAX_NUM_FORMS': '',
-...     'membership_set-0-date_joined_0': unicode(now.strftime('%Y-%m-%d')),
-...     'membership_set-0-date_joined_1': unicode(now.strftime('%H:%M:%S')),
-...     'initial-membership_set-0-date_joined': unicode(now.strftime('%Y-%m-%d %H:%M:%S')),
-...     'membership_set-0-karma': '',
-... }
->>> formset = FormSet(data, instance=person)
->>> formset.is_valid()
-True
-
-# inlineformset_factory tests with fk having null=True. see #9462.
-# create some data that will exbit the issue
->>> team = Team.objects.create(name=u"Red Vipers")
->>> Player(name="Timmy").save()
->>> Player(name="Bobby", team=team).save()
-
->>> PlayerInlineFormSet = inlineformset_factory(Team, Player)
->>> formset = PlayerInlineFormSet()
->>> formset.get_queryset()
-[]
-
->>> formset = PlayerInlineFormSet(instance=team)
->>> formset.get_queryset()
-[<Player: Bobby>]
-
-# a formset for a Model that has a custom primary key that still needs to be
-# added to the formset automatically
->>> FormSet = modelformset_factory(ClassyMexicanRestaurant, fields=["tacos_are_yummy"])
->>> sorted(FormSet().forms[0].fields.keys())
-['restaurant', 'tacos_are_yummy']
-
-# Prevent duplicates from within the same formset
->>> FormSet = modelformset_factory(Product, extra=2)
->>> data = {
-...     'form-TOTAL_FORMS': 2,
-...     'form-INITIAL_FORMS': 0,
-...     'form-MAX_NUM_FORMS': '',
-...     'form-0-slug': 'red_car',
-...     'form-1-slug': 'red_car',
-... }
->>> formset = FormSet(data)
->>> formset.is_valid()
-False
->>> formset._non_form_errors
-[u'Please correct the duplicate data for slug.']
-
->>> FormSet = modelformset_factory(Price, extra=2)
->>> data = {
-...     'form-TOTAL_FORMS': 2,
-...     'form-INITIAL_FORMS': 0,
-...     'form-MAX_NUM_FORMS': '',
-...     'form-0-price': '25',
-...     'form-0-quantity': '7',
-...     'form-1-price': '25',
-...     'form-1-quantity': '7',
-... }
->>> formset = FormSet(data)
->>> formset.is_valid()
-False
->>> formset._non_form_errors
-[u'Please correct the duplicate data for price and quantity, which must be unique.']
-
-# Only the price field is specified, this should skip any unique checks since
-# the unique_together is not fulfilled. This will fail with a KeyError if broken.
->>> FormSet = modelformset_factory(Price, fields=("price",), extra=2)
->>> data = {
-...     'form-TOTAL_FORMS': '2',
-...     'form-INITIAL_FORMS': '0',
-...     'form-MAX_NUM_FORMS': '',
-...     'form-0-price': '24',
-...     'form-1-price': '24',
-... }
->>> formset = FormSet(data)
->>> formset.is_valid()
-True
-
->>> FormSet = inlineformset_factory(Author, Book, extra=0)
->>> author = Author.objects.order_by('id')[0]
->>> book_ids = author.book_set.values_list('id', flat=True)
->>> data = {
-...     'book_set-TOTAL_FORMS': '2',
-...     'book_set-INITIAL_FORMS': '2',
-...     'book_set-MAX_NUM_FORMS': '',
-...
-...     'book_set-0-title': 'The 2008 Election',
-...     'book_set-0-author': str(author.id),
-...     'book_set-0-id': str(book_ids[0]),
-...
-...     'book_set-1-title': 'The 2008 Election',
-...     'book_set-1-author': str(author.id),
-...     'book_set-1-id': str(book_ids[1]),
-... }
->>> formset = FormSet(data=data, instance=author)
->>> formset.is_valid()
-False
->>> formset._non_form_errors
-[u'Please correct the duplicate data for title.']
->>> formset.errors
-[{}, {'__all__': u'Please correct the duplicate values below.'}]
-
->>> FormSet = modelformset_factory(Post, extra=2)
->>> data = {
-...     'form-TOTAL_FORMS': '2',
-...     'form-INITIAL_FORMS': '0',
-...     'form-MAX_NUM_FORMS': '',
-...
-...     'form-0-title': 'blah',
-...     'form-0-slug': 'Morning',
-...     'form-0-subtitle': 'foo',
-...     'form-0-posted': '2009-01-01',
-...     'form-1-title': 'blah',
-...     'form-1-slug': 'Morning in Prague',
-...     'form-1-subtitle': 'rawr',
-...     'form-1-posted': '2009-01-01'
-... }
->>> formset = FormSet(data)
->>> formset.is_valid()
-False
->>> formset._non_form_errors
-[u'Please correct the duplicate data for title which must be unique for the date in posted.']
->>> formset.errors
-[{}, {'__all__': u'Please correct the duplicate values below.'}]
-
->>> data = {
-...     'form-TOTAL_FORMS': '2',
-...     'form-INITIAL_FORMS': '0',
-...     'form-MAX_NUM_FORMS': '',
-...
-...     'form-0-title': 'foo',
-...     'form-0-slug': 'Morning in Prague',
-...     'form-0-subtitle': 'foo',
-...     'form-0-posted': '2009-01-01',
-...     'form-1-title': 'blah',
-...     'form-1-slug': 'Morning in Prague',
-...     'form-1-subtitle': 'rawr',
-...     'form-1-posted': '2009-08-02'
-... }
->>> formset = FormSet(data)
->>> formset.is_valid()
-False
->>> formset._non_form_errors
-[u'Please correct the duplicate data for slug which must be unique for the year in posted.']
-
->>> data = {
-...     'form-TOTAL_FORMS': '2',
-...     'form-INITIAL_FORMS': '0',
-...     'form-MAX_NUM_FORMS': '',
-...
-...     'form-0-title': 'foo',
-...     'form-0-slug': 'Morning in Prague',
-...     'form-0-subtitle': 'rawr',
-...     'form-0-posted': '2008-08-01',
-...     'form-1-title': 'blah',
-...     'form-1-slug': 'Prague',
-...     'form-1-subtitle': 'rawr',
-...     'form-1-posted': '2009-08-02'
-... }
->>> formset = FormSet(data)
->>> formset.is_valid()
-False
->>> formset._non_form_errors
-[u'Please correct the duplicate data for subtitle which must be unique for the month in posted.']
-"""}
diff --git a/tests/modeltests/model_formsets/tests.py b/tests/modeltests/model_formsets/tests.py
index 62489bad37..396f1bd582 100644
--- a/tests/modeltests/model_formsets/tests.py
+++ b/tests/modeltests/model_formsets/tests.py
@@ -1,6 +1,20 @@
-from django.test import TestCase
+import datetime
+import re
+from datetime import date
+from decimal import Decimal
+from django import forms
+from django.db import models
+from django.forms.models import _get_foreign_key
+from django.forms.models import inlineformset_factory
 from django.forms.models import modelformset_factory
-from modeltests.model_formsets.models import Poet, Poem
+from django.forms.models import modelformset_factory
+from django.test import TestCase
+from modeltests.model_formsets.models import (
+    Author, BetterAuthor, Book, BookWithCustomPK, Editor,
+    BookWithOptionalAltEditor, AlternateBook, AuthorMeeting, CustomPrimaryKey,
+    Place, Owner, Location, OwnerProfile, Restaurant, Product, Price,
+    MexicanRestaurant, ClassyMexicanRestaurant, Repository, Revision,
+    Person, Membership, Team, Player, Poet, Poem, Post)
 
 class DeletionTests(TestCase):
     def test_deletion(self):
@@ -71,3 +85,1075 @@ class DeletionTests(TestCase):
         self.assertEqual(formset.is_valid(), True)
         formset.save()
         self.assertEqual(Poet.objects.count(), 0)
+
+class ModelFormsetTest(TestCase):
+    def test_simple_save(self):
+        qs = Author.objects.all()
+        AuthorFormSet = modelformset_factory(Author, extra=3)
+
+        formset = AuthorFormSet(queryset=qs)
+        self.assertEqual(len(formset.forms), 3)
+        self.assertEqual(formset.forms[0].as_p(),
+            '<p><label for="id_form-0-name">Name:</label> <input id="id_form-0-name" type="text" name="form-0-name" maxlength="100" /><input type="hidden" name="form-0-id" id="id_form-0-id" /></p>')
+        self.assertEqual(formset.forms[1].as_p(),
+            '<p><label for="id_form-1-name">Name:</label> <input id="id_form-1-name" type="text" name="form-1-name" maxlength="100" /><input type="hidden" name="form-1-id" id="id_form-1-id" /></p>')
+        self.assertEqual(formset.forms[2].as_p(),
+            '<p><label for="id_form-2-name">Name:</label> <input id="id_form-2-name" type="text" name="form-2-name" maxlength="100" /><input type="hidden" name="form-2-id" id="id_form-2-id" /></p>')
+
+        data = {
+            'form-TOTAL_FORMS': '3', # the number of forms rendered
+            'form-INITIAL_FORMS': '0', # the number of forms with initial data
+            'form-MAX_NUM_FORMS': '', # the max number of forms
+            'form-0-name': 'Charles Baudelaire',
+            'form-1-name': 'Arthur Rimbaud',
+            'form-2-name': '',
+        }
+
+        formset = AuthorFormSet(data=data, queryset=qs)
+        self.assertTrue(formset.is_valid())
+
+        saved = formset.save()
+        self.assertEqual(len(saved), 2)
+        author1, author2 = saved
+        self.assertEqual(author1, Author.objects.get(name='Charles Baudelaire'))
+        self.assertEqual(author2, Author.objects.get(name='Arthur Rimbaud'))
+
+        authors = list(Author.objects.order_by('name'))
+        self.assertEqual(authors, [author2, author1])
+
+        # Gah! We forgot Paul Verlaine. Let's create a formset to edit the
+        # existing authors with an extra form to add him. We *could* pass in a
+        # queryset to restrict the Author objects we edit, but in this case
+        # we'll use it to display them in alphabetical order by name.
+
+        qs = Author.objects.order_by('name')
+        AuthorFormSet = modelformset_factory(Author, extra=1, can_delete=False)
+
+        formset = AuthorFormSet(queryset=qs)
+        self.assertEqual(len(formset.forms), 3)
+        self.assertEqual(formset.forms[0].as_p(),
+            '<p><label for="id_form-0-name">Name:</label> <input id="id_form-0-name" type="text" name="form-0-name" value="Arthur Rimbaud" maxlength="100" /><input type="hidden" name="form-0-id" value="%d" id="id_form-0-id" /></p>' % author2.id)
+        self.assertEqual(formset.forms[1].as_p(),
+            '<p><label for="id_form-1-name">Name:</label> <input id="id_form-1-name" type="text" name="form-1-name" value="Charles Baudelaire" maxlength="100" /><input type="hidden" name="form-1-id" value="%d" id="id_form-1-id" /></p>' % author1.id)
+        self.assertEqual(formset.forms[2].as_p(),
+            '<p><label for="id_form-2-name">Name:</label> <input id="id_form-2-name" type="text" name="form-2-name" maxlength="100" /><input type="hidden" name="form-2-id" id="id_form-2-id" /></p>')
+
+        data = {
+            'form-TOTAL_FORMS': '3', # the number of forms rendered
+            'form-INITIAL_FORMS': '2', # the number of forms with initial data
+            'form-MAX_NUM_FORMS': '', # the max number of forms
+            'form-0-id': str(author2.id),
+            'form-0-name': 'Arthur Rimbaud',
+            'form-1-id': str(author1.id),
+            'form-1-name': 'Charles Baudelaire',
+            'form-2-name': 'Paul Verlaine',
+        }
+
+        formset = AuthorFormSet(data=data, queryset=qs)
+        self.assertTrue(formset.is_valid())
+
+        # Only changed or new objects are returned from formset.save()
+        saved = formset.save()
+        self.assertEqual(len(saved), 1)
+        author3 = saved[0]
+        self.assertEqual(author3, Author.objects.get(name='Paul Verlaine'))
+
+        authors = list(Author.objects.order_by('name'))
+        self.assertEqual(authors, [author2, author1, author3])
+
+        # This probably shouldn't happen, but it will. If an add form was
+        # marked for deletion, make sure we don't save that form.
+
+        qs = Author.objects.order_by('name')
+        AuthorFormSet = modelformset_factory(Author, extra=1, can_delete=True)
+
+        formset = AuthorFormSet(queryset=qs)
+        self.assertEqual(len(formset.forms), 4)
+        self.assertEqual(formset.forms[0].as_p(),
+            '<p><label for="id_form-0-name">Name:</label> <input id="id_form-0-name" type="text" name="form-0-name" value="Arthur Rimbaud" maxlength="100" /></p>\n'
+            '<p><label for="id_form-0-DELETE">Delete:</label> <input type="checkbox" name="form-0-DELETE" id="id_form-0-DELETE" /><input type="hidden" name="form-0-id" value="%d" id="id_form-0-id" /></p>' % author2.id)
+        self.assertEqual(formset.forms[1].as_p(),
+            '<p><label for="id_form-1-name">Name:</label> <input id="id_form-1-name" type="text" name="form-1-name" value="Charles Baudelaire" maxlength="100" /></p>\n'
+            '<p><label for="id_form-1-DELETE">Delete:</label> <input type="checkbox" name="form-1-DELETE" id="id_form-1-DELETE" /><input type="hidden" name="form-1-id" value="%d" id="id_form-1-id" /></p>' % author1.id)
+        self.assertEqual(formset.forms[2].as_p(),
+            '<p><label for="id_form-2-name">Name:</label> <input id="id_form-2-name" type="text" name="form-2-name" value="Paul Verlaine" maxlength="100" /></p>\n'
+            '<p><label for="id_form-2-DELETE">Delete:</label> <input type="checkbox" name="form-2-DELETE" id="id_form-2-DELETE" /><input type="hidden" name="form-2-id" value="%d" id="id_form-2-id" /></p>' % author3.id)
+        self.assertEqual(formset.forms[3].as_p(),
+            '<p><label for="id_form-3-name">Name:</label> <input id="id_form-3-name" type="text" name="form-3-name" maxlength="100" /></p>\n'
+            '<p><label for="id_form-3-DELETE">Delete:</label> <input type="checkbox" name="form-3-DELETE" id="id_form-3-DELETE" /><input type="hidden" name="form-3-id" id="id_form-3-id" /></p>')
+
+        data = {
+            'form-TOTAL_FORMS': '4', # the number of forms rendered
+            'form-INITIAL_FORMS': '3', # the number of forms with initial data
+            'form-MAX_NUM_FORMS': '', # the max number of forms
+            'form-0-id': str(author2.id),
+            'form-0-name': 'Arthur Rimbaud',
+            'form-1-id': str(author1.id),
+            'form-1-name': 'Charles Baudelaire',
+            'form-2-id': str(author3.id),
+            'form-2-name': 'Paul Verlaine',
+            'form-3-name': 'Walt Whitman',
+            'form-3-DELETE': 'on',
+        }
+
+        formset = AuthorFormSet(data=data, queryset=qs)
+        self.assertTrue(formset.is_valid())
+
+        # No objects were changed or saved so nothing will come back.
+
+        self.assertEqual(formset.save(), [])
+
+        authors = list(Author.objects.order_by('name'))
+        self.assertEqual(authors, [author2, author1, author3])
+
+        # Let's edit a record to ensure save only returns that one record.
+
+        data = {
+            'form-TOTAL_FORMS': '4', # the number of forms rendered
+            'form-INITIAL_FORMS': '3', # the number of forms with initial data
+            'form-MAX_NUM_FORMS': '', # the max number of forms
+            'form-0-id': str(author2.id),
+            'form-0-name': 'Walt Whitman',
+            'form-1-id': str(author1.id),
+            'form-1-name': 'Charles Baudelaire',
+            'form-2-id': str(author3.id),
+            'form-2-name': 'Paul Verlaine',
+            'form-3-name': '',
+            'form-3-DELETE': '',
+        }
+
+        formset = AuthorFormSet(data=data, queryset=qs)
+        self.assertTrue(formset.is_valid())
+
+        # One record has changed.
+
+        saved = formset.save()
+        self.assertEqual(len(saved), 1)
+        self.assertEqual(saved[0], Author.objects.get(name='Walt Whitman'))
+
+    def test_commit_false(self):
+        # Test the behavior of commit=False and save_m2m
+
+        author1 = Author.objects.create(name='Charles Baudelaire')
+        author2 = Author.objects.create(name='Paul Verlaine')
+        author3 = Author.objects.create(name='Walt Whitman')
+
+        meeting = AuthorMeeting.objects.create(created=date.today())
+        meeting.authors = Author.objects.all()
+
+        # create an Author instance to add to the meeting.
+
+        author4 = Author.objects.create(name=u'John Steinbeck')
+
+        AuthorMeetingFormSet = modelformset_factory(AuthorMeeting, extra=1, can_delete=True)
+        data = {
+            'form-TOTAL_FORMS': '2', # the number of forms rendered
+            'form-INITIAL_FORMS': '1', # the number of forms with initial data
+            'form-MAX_NUM_FORMS': '', # the max number of forms
+            'form-0-id': '1',
+            'form-0-name': '2nd Tuesday of the Week Meeting',
+            'form-0-authors': [2, 1, 3, 4],
+            'form-1-name': '',
+            'form-1-authors': '',
+            'form-1-DELETE': '',
+        }
+        formset = AuthorMeetingFormSet(data=data, queryset=AuthorMeeting.objects.all())
+        self.assertTrue(formset.is_valid())
+
+        instances = formset.save(commit=False)
+        for instance in instances:
+            instance.created = date.today()
+            instance.save()
+        formset.save_m2m()
+        self.assertQuerysetEqual(instances[0].authors.all(), [
+            '<Author: Charles Baudelaire>',
+            '<Author: John Steinbeck>',
+            '<Author: Paul Verlaine>',
+            '<Author: Walt Whitman>',
+        ])
+
+    def test_max_num(self):
+        # Test the behavior of max_num with model formsets. It should allow
+        # all existing related objects/inlines for a given object to be
+        # displayed, but not allow the creation of new inlines beyond max_num.
+
+        author1 = Author.objects.create(name='Charles Baudelaire')
+        author2 = Author.objects.create(name='Paul Verlaine')
+        author3 = Author.objects.create(name='Walt Whitman')
+
+        qs = Author.objects.order_by('name')
+
+        AuthorFormSet = modelformset_factory(Author, max_num=None, extra=3)
+        formset = AuthorFormSet(queryset=qs)
+        self.assertEqual(len(formset.forms), 6)
+        self.assertEqual(len(formset.extra_forms), 3)
+
+        AuthorFormSet = modelformset_factory(Author, max_num=4, extra=3)
+        formset = AuthorFormSet(queryset=qs)
+        self.assertEqual(len(formset.forms), 4)
+        self.assertEqual(len(formset.extra_forms), 1)
+
+        AuthorFormSet = modelformset_factory(Author, max_num=0, extra=3)
+        formset = AuthorFormSet(queryset=qs)
+        self.assertEqual(len(formset.forms), 3)
+        self.assertEqual(len(formset.extra_forms), 0)
+
+        AuthorFormSet = modelformset_factory(Author, max_num=None)
+        formset = AuthorFormSet(queryset=qs)
+        self.assertQuerysetEqual(formset.get_queryset(), [
+            '<Author: Charles Baudelaire>',
+            '<Author: Paul Verlaine>',
+            '<Author: Walt Whitman>',
+        ])
+
+        AuthorFormSet = modelformset_factory(Author, max_num=0)
+        formset = AuthorFormSet(queryset=qs)
+        self.assertQuerysetEqual(formset.get_queryset(), [
+            '<Author: Charles Baudelaire>',
+            '<Author: Paul Verlaine>',
+            '<Author: Walt Whitman>',
+        ])
+
+        AuthorFormSet = modelformset_factory(Author, max_num=4)
+        formset = AuthorFormSet(queryset=qs)
+        self.assertQuerysetEqual(formset.get_queryset(), [
+            '<Author: Charles Baudelaire>',
+            '<Author: Paul Verlaine>',
+            '<Author: Walt Whitman>',
+        ])
+
+    def test_custom_save_method(self):
+        class PoetForm(forms.ModelForm):
+            def save(self, commit=True):
+                # change the name to "Vladimir Mayakovsky" just to be a jerk.
+                author = super(PoetForm, self).save(commit=False)
+                author.name = u"Vladimir Mayakovsky"
+                if commit:
+                    author.save()
+                return author
+
+        PoetFormSet = modelformset_factory(Poet, form=PoetForm)
+
+        data = {
+            'form-TOTAL_FORMS': '3', # the number of forms rendered
+            'form-INITIAL_FORMS': '0', # the number of forms with initial data
+            'form-MAX_NUM_FORMS': '', # the max number of forms
+            'form-0-name': 'Walt Whitman',
+            'form-1-name': 'Charles Baudelaire',
+            'form-2-name': '',
+        }
+
+        qs = Poet.objects.all()
+        formset = PoetFormSet(data=data, queryset=qs)
+        self.assertTrue(formset.is_valid())
+
+        poets = formset.save()
+        self.assertEqual(len(poets), 2)
+        poet1, poet2 = poets
+        self.assertEqual(poet1.name, 'Vladimir Mayakovsky')
+        self.assertEqual(poet2.name, 'Vladimir Mayakovsky')
+
+    def test_model_inheritance(self):
+        BetterAuthorFormSet = modelformset_factory(BetterAuthor)
+        formset = BetterAuthorFormSet()
+        self.assertEqual(len(formset.forms), 1)
+        self.assertEqual(formset.forms[0].as_p(),
+            '<p><label for="id_form-0-name">Name:</label> <input id="id_form-0-name" type="text" name="form-0-name" maxlength="100" /></p>\n'
+            '<p><label for="id_form-0-write_speed">Write speed:</label> <input type="text" name="form-0-write_speed" id="id_form-0-write_speed" /><input type="hidden" name="form-0-author_ptr" id="id_form-0-author_ptr" /></p>')
+
+        data = {
+            'form-TOTAL_FORMS': '1', # the number of forms rendered
+            'form-INITIAL_FORMS': '0', # the number of forms with initial data
+            'form-MAX_NUM_FORMS': '', # the max number of forms
+            'form-0-author_ptr': '',
+            'form-0-name': 'Ernest Hemingway',
+            'form-0-write_speed': '10',
+        }
+
+        formset = BetterAuthorFormSet(data)
+        self.assertTrue(formset.is_valid())
+        saved = formset.save()
+        self.assertEqual(len(saved), 1)
+        author1, = saved
+        self.assertEqual(author1, BetterAuthor.objects.get(name='Ernest Hemingway'))
+        hemingway_id = BetterAuthor.objects.get(name="Ernest Hemingway").pk
+
+        formset = BetterAuthorFormSet()
+        self.assertEqual(len(formset.forms), 2)
+        self.assertEqual(formset.forms[0].as_p(),
+            '<p><label for="id_form-0-name">Name:</label> <input id="id_form-0-name" type="text" name="form-0-name" value="Ernest Hemingway" maxlength="100" /></p>\n'
+            '<p><label for="id_form-0-write_speed">Write speed:</label> <input type="text" name="form-0-write_speed" value="10" id="id_form-0-write_speed" /><input type="hidden" name="form-0-author_ptr" value="%d" id="id_form-0-author_ptr" /></p>' % hemingway_id)
+        self.assertEqual(formset.forms[1].as_p(),
+            '<p><label for="id_form-1-name">Name:</label> <input id="id_form-1-name" type="text" name="form-1-name" maxlength="100" /></p>\n'
+            '<p><label for="id_form-1-write_speed">Write speed:</label> <input type="text" name="form-1-write_speed" id="id_form-1-write_speed" /><input type="hidden" name="form-1-author_ptr" id="id_form-1-author_ptr" /></p>')
+
+        data = {
+            'form-TOTAL_FORMS': '2', # the number of forms rendered
+            'form-INITIAL_FORMS': '1', # the number of forms with initial data
+            'form-MAX_NUM_FORMS': '', # the max number of forms
+            'form-0-author_ptr': hemingway_id,
+            'form-0-name': 'Ernest Hemingway',
+            'form-0-write_speed': '10',
+            'form-1-author_ptr': '',
+            'form-1-name': '',
+            'form-1-write_speed': '',
+        }
+
+        formset = BetterAuthorFormSet(data)
+        self.assertTrue(formset.is_valid())
+        self.assertEqual(formset.save(), [])
+
+    def test_inline_formsets(self):
+        # We can also create a formset that is tied to a parent model. This is
+        # how the admin system's edit inline functionality works.
+
+        AuthorBooksFormSet = inlineformset_factory(Author, Book, can_delete=False, extra=3)
+        author = Author.objects.create(name='Charles Baudelaire')
+
+        formset = AuthorBooksFormSet(instance=author)
+        self.assertEqual(len(formset.forms), 3)
+        self.assertEqual(formset.forms[0].as_p(),
+            '<p><label for="id_book_set-0-title">Title:</label> <input id="id_book_set-0-title" type="text" name="book_set-0-title" maxlength="100" /><input type="hidden" name="book_set-0-author" value="%d" id="id_book_set-0-author" /><input type="hidden" name="book_set-0-id" id="id_book_set-0-id" /></p>'  % author.id)
+        self.assertEqual(formset.forms[1].as_p(),
+            '<p><label for="id_book_set-1-title">Title:</label> <input id="id_book_set-1-title" type="text" name="book_set-1-title" maxlength="100" /><input type="hidden" name="book_set-1-author" value="%d" id="id_book_set-1-author" /><input type="hidden" name="book_set-1-id" id="id_book_set-1-id" /></p>' % author.id)
+        self.assertEqual(formset.forms[2].as_p(),
+            '<p><label for="id_book_set-2-title">Title:</label> <input id="id_book_set-2-title" type="text" name="book_set-2-title" maxlength="100" /><input type="hidden" name="book_set-2-author" value="%d" id="id_book_set-2-author" /><input type="hidden" name="book_set-2-id" id="id_book_set-2-id" /></p>' % author.id)
+
+        data = {
+            'book_set-TOTAL_FORMS': '3', # the number of forms rendered
+            'book_set-INITIAL_FORMS': '0', # the number of forms with initial data
+            'book_set-MAX_NUM_FORMS': '', # the max number of forms
+            'book_set-0-title': 'Les Fleurs du Mal',
+            'book_set-1-title': '',
+            'book_set-2-title': '',
+        }
+
+        formset = AuthorBooksFormSet(data, instance=author)
+        self.assertTrue(formset.is_valid())
+
+        saved = formset.save()
+        self.assertEqual(len(saved), 1)
+        book1, = saved
+        self.assertEqual(book1, Book.objects.get(title='Les Fleurs du Mal'))
+        self.assertQuerysetEqual(author.book_set.all(), ['<Book: Les Fleurs du Mal>'])
+
+        # Now that we've added a book to Charles Baudelaire, let's try adding
+        # another one. This time though, an edit form will be available for
+        # every existing book.
+
+        AuthorBooksFormSet = inlineformset_factory(Author, Book, can_delete=False, extra=2)
+        author = Author.objects.get(name='Charles Baudelaire')
+
+        formset = AuthorBooksFormSet(instance=author)
+        self.assertEqual(len(formset.forms), 3)
+        self.assertEqual(formset.forms[0].as_p(),
+            '<p><label for="id_book_set-0-title">Title:</label> <input id="id_book_set-0-title" type="text" name="book_set-0-title" value="Les Fleurs du Mal" maxlength="100" /><input type="hidden" name="book_set-0-author" value="%d" id="id_book_set-0-author" /><input type="hidden" name="book_set-0-id" value="%d" id="id_book_set-0-id" /></p>' % (author.id, book1.id))
+        self.assertEqual(formset.forms[1].as_p(),
+            '<p><label for="id_book_set-1-title">Title:</label> <input id="id_book_set-1-title" type="text" name="book_set-1-title" maxlength="100" /><input type="hidden" name="book_set-1-author" value="%d" id="id_book_set-1-author" /><input type="hidden" name="book_set-1-id" id="id_book_set-1-id" /></p>' % author.id)
+        self.assertEqual(formset.forms[2].as_p(),
+            '<p><label for="id_book_set-2-title">Title:</label> <input id="id_book_set-2-title" type="text" name="book_set-2-title" maxlength="100" /><input type="hidden" name="book_set-2-author" value="%d" id="id_book_set-2-author" /><input type="hidden" name="book_set-2-id" id="id_book_set-2-id" /></p>' % author.id)
+
+        data = {
+            'book_set-TOTAL_FORMS': '3', # the number of forms rendered
+            'book_set-INITIAL_FORMS': '1', # the number of forms with initial data
+            'book_set-MAX_NUM_FORMS': '', # the max number of forms
+            'book_set-0-id': '1',
+            'book_set-0-title': 'Les Fleurs du Mal',
+            'book_set-1-title': 'Les Paradis Artificiels',
+            'book_set-2-title': '',
+        }
+
+        formset = AuthorBooksFormSet(data, instance=author)
+        self.assertTrue(formset.is_valid())
+
+        saved = formset.save()
+        self.assertEqual(len(saved), 1)
+        book2, = saved
+        self.assertEqual(book2, Book.objects.get(title='Les Paradis Artificiels'))
+
+        # As you can see, 'Les Paradis Artificiels' is now a book belonging to
+        # Charles Baudelaire.
+        self.assertQuerysetEqual(author.book_set.order_by('title'), [
+            '<Book: Les Fleurs du Mal>',
+            '<Book: Les Paradis Artificiels>',
+        ])
+
+    def test_inline_formsets_save_as_new(self):
+        # The save_as_new parameter lets you re-associate the data to a new
+        # instance.  This is used in the admin for save_as functionality.
+        AuthorBooksFormSet = inlineformset_factory(Author, Book, can_delete=False, extra=2)
+        author = Author.objects.create(name='Charles Baudelaire')
+
+        data = {
+            'book_set-TOTAL_FORMS': '3', # the number of forms rendered
+            'book_set-INITIAL_FORMS': '2', # the number of forms with initial data
+            'book_set-MAX_NUM_FORMS': '', # the max number of forms
+            'book_set-0-id': '1',
+            'book_set-0-title': 'Les Fleurs du Mal',
+            'book_set-1-id': '2',
+            'book_set-1-title': 'Les Paradis Artificiels',
+            'book_set-2-title': '',
+        }
+
+        formset = AuthorBooksFormSet(data, instance=Author(), save_as_new=True)
+        self.assertTrue(formset.is_valid())
+
+        new_author = Author.objects.create(name='Charles Baudelaire')
+        formset = AuthorBooksFormSet(data, instance=new_author, save_as_new=True)
+        saved = formset.save()
+        self.assertEqual(len(saved), 2)
+        book1, book2 = saved
+        self.assertEqual(book1.title, 'Les Fleurs du Mal')
+        self.assertEqual(book2.title, 'Les Paradis Artificiels')
+
+        # Test using a custom prefix on an inline formset.
+
+        formset = AuthorBooksFormSet(prefix="test")
+        self.assertEqual(len(formset.forms), 2)
+        self.assertEqual(formset.forms[0].as_p(),
+            '<p><label for="id_test-0-title">Title:</label> <input id="id_test-0-title" type="text" name="test-0-title" maxlength="100" /><input type="hidden" name="test-0-author" id="id_test-0-author" /><input type="hidden" name="test-0-id" id="id_test-0-id" /></p>')
+        self.assertEqual(formset.forms[1].as_p(),
+            '<p><label for="id_test-1-title">Title:</label> <input id="id_test-1-title" type="text" name="test-1-title" maxlength="100" /><input type="hidden" name="test-1-author" id="id_test-1-author" /><input type="hidden" name="test-1-id" id="id_test-1-id" /></p>')
+
+    def test_inline_formsets_with_custom_pk(self):
+        # Test inline formsets where the inline-edited object has a custom
+        # primary key that is not the fk to the parent object.
+
+        AuthorBooksFormSet2 = inlineformset_factory(Author, BookWithCustomPK, can_delete=False, extra=1)
+        author = Author.objects.create(pk=1, name='Charles Baudelaire')
+
+        formset = AuthorBooksFormSet2(instance=author)
+        self.assertEqual(len(formset.forms), 1)
+        self.assertEqual(formset.forms[0].as_p(),
+            '<p><label for="id_bookwithcustompk_set-0-my_pk">My pk:</label> <input type="text" name="bookwithcustompk_set-0-my_pk" id="id_bookwithcustompk_set-0-my_pk" /></p>\n'
+            '<p><label for="id_bookwithcustompk_set-0-title">Title:</label> <input id="id_bookwithcustompk_set-0-title" type="text" name="bookwithcustompk_set-0-title" maxlength="100" /><input type="hidden" name="bookwithcustompk_set-0-author" value="1" id="id_bookwithcustompk_set-0-author" /></p>')
+
+        data = {
+            'bookwithcustompk_set-TOTAL_FORMS': '1', # the number of forms rendered
+            'bookwithcustompk_set-INITIAL_FORMS': '0', # the number of forms with initial data
+            'bookwithcustompk_set-MAX_NUM_FORMS': '', # the max number of forms
+            'bookwithcustompk_set-0-my_pk': '77777',
+            'bookwithcustompk_set-0-title': 'Les Fleurs du Mal',
+        }
+
+        formset = AuthorBooksFormSet2(data, instance=author)
+        self.assertTrue(formset.is_valid())
+
+        saved = formset.save()
+        self.assertEqual(len(saved), 1)
+        book1, = saved
+        self.assertEqual(book1.pk, 77777)
+
+        book1 = author.bookwithcustompk_set.get()
+        self.assertEqual(book1.title, 'Les Fleurs du Mal')
+
+    def test_inline_formsets_with_multi_table_inheritance(self):
+        # Test inline formsets where the inline-edited object uses multi-table
+        # inheritance, thus has a non AutoField yet auto-created primary key.
+
+        AuthorBooksFormSet3 = inlineformset_factory(Author, AlternateBook, can_delete=False, extra=1)
+        author = Author.objects.create(pk=1, name='Charles Baudelaire')
+
+        formset = AuthorBooksFormSet3(instance=author)
+        self.assertEqual(len(formset.forms), 1)
+        self.assertEqual(formset.forms[0].as_p(),
+            '<p><label for="id_alternatebook_set-0-title">Title:</label> <input id="id_alternatebook_set-0-title" type="text" name="alternatebook_set-0-title" maxlength="100" /></p>\n'
+            '<p><label for="id_alternatebook_set-0-notes">Notes:</label> <input id="id_alternatebook_set-0-notes" type="text" name="alternatebook_set-0-notes" maxlength="100" /><input type="hidden" name="alternatebook_set-0-author" value="1" id="id_alternatebook_set-0-author" /><input type="hidden" name="alternatebook_set-0-book_ptr" id="id_alternatebook_set-0-book_ptr" /></p>')
+
+        data = {
+            'alternatebook_set-TOTAL_FORMS': '1', # the number of forms rendered
+            'alternatebook_set-INITIAL_FORMS': '0', # the number of forms with initial data
+            'alternatebook_set-MAX_NUM_FORMS': '', # the max number of forms
+            'alternatebook_set-0-title': 'Flowers of Evil',
+            'alternatebook_set-0-notes': 'English translation of Les Fleurs du Mal'
+        }
+
+        formset = AuthorBooksFormSet3(data, instance=author)
+        self.assertTrue(formset.is_valid())
+
+        saved = formset.save()
+        self.assertEqual(len(saved), 1)
+        book1, = saved
+        self.assertEqual(book1.title, 'Flowers of Evil')
+        self.assertEqual(book1.notes, 'English translation of Les Fleurs du Mal')
+
+        # Test inline formsets where the inline-edited object has a
+        # unique_together constraint with a nullable member
+
+        AuthorBooksFormSet4 = inlineformset_factory(Author, BookWithOptionalAltEditor, can_delete=False, extra=2)
+
+        data = {
+            'bookwithoptionalalteditor_set-TOTAL_FORMS': '2', # the number of forms rendered
+            'bookwithoptionalalteditor_set-INITIAL_FORMS': '0', # the number of forms with initial data
+            'bookwithoptionalalteditor_set-MAX_NUM_FORMS': '', # the max number of forms
+            'bookwithoptionalalteditor_set-0-author': '1',
+            'bookwithoptionalalteditor_set-0-title': 'Les Fleurs du Mal',
+            'bookwithoptionalalteditor_set-1-author': '1',
+            'bookwithoptionalalteditor_set-1-title': 'Les Fleurs du Mal',
+        }
+        formset = AuthorBooksFormSet4(data, instance=author)
+        self.assertTrue(formset.is_valid())
+
+        saved = formset.save()
+        self.assertEqual(len(saved), 2)
+        book1, book2 = saved
+        self.assertEqual(book1.author_id, 1)
+        self.assertEqual(book1.title, 'Les Fleurs du Mal')
+        self.assertEqual(book2.author_id, 1)
+        self.assertEqual(book2.title, 'Les Fleurs du Mal')
+
+    def test_inline_formsets_with_custom_save_method(self):
+        AuthorBooksFormSet = inlineformset_factory(Author, Book, can_delete=False, extra=2)
+        author = Author.objects.create(pk=1, name='Charles Baudelaire')
+        book1 = Book.objects.create(pk=1, author=author, title='Les Paradis Artificiels')
+        book2 = Book.objects.create(pk=2, author=author, title='Les Fleurs du Mal')
+        book3 = Book.objects.create(pk=3, author=author, title='Flowers of Evil')
+
+        class PoemForm(forms.ModelForm):
+            def save(self, commit=True):
+                # change the name to "Brooklyn Bridge" just to be a jerk.
+                poem = super(PoemForm, self).save(commit=False)
+                poem.name = u"Brooklyn Bridge"
+                if commit:
+                    poem.save()
+                return poem
+
+        PoemFormSet = inlineformset_factory(Poet, Poem, form=PoemForm)
+
+        data = {
+            'poem_set-TOTAL_FORMS': '3', # the number of forms rendered
+            'poem_set-INITIAL_FORMS': '0', # the number of forms with initial data
+            'poem_set-MAX_NUM_FORMS': '', # the max number of forms
+            'poem_set-0-name': 'The Cloud in Trousers',
+            'poem_set-1-name': 'I',
+            'poem_set-2-name': '',
+        }
+
+        poet = Poet.objects.create(name='Vladimir Mayakovsky')
+        formset = PoemFormSet(data=data, instance=poet)
+        self.assertTrue(formset.is_valid())
+
+        saved = formset.save()
+        self.assertEqual(len(saved), 2)
+        poem1, poem2 = saved
+        self.assertEqual(poem1.name, 'Brooklyn Bridge')
+        self.assertEqual(poem2.name, 'Brooklyn Bridge')
+
+        # We can provide a custom queryset to our InlineFormSet:
+
+        custom_qs = Book.objects.order_by('-title')
+        formset = AuthorBooksFormSet(instance=author, queryset=custom_qs)
+        self.assertEqual(len(formset.forms), 5)
+        self.assertEqual(formset.forms[0].as_p(),
+            '<p><label for="id_book_set-0-title">Title:</label> <input id="id_book_set-0-title" type="text" name="book_set-0-title" value="Les Paradis Artificiels" maxlength="100" /><input type="hidden" name="book_set-0-author" value="1" id="id_book_set-0-author" /><input type="hidden" name="book_set-0-id" value="1" id="id_book_set-0-id" /></p>')
+        self.assertEqual(formset.forms[1].as_p(),
+            '<p><label for="id_book_set-1-title">Title:</label> <input id="id_book_set-1-title" type="text" name="book_set-1-title" value="Les Fleurs du Mal" maxlength="100" /><input type="hidden" name="book_set-1-author" value="1" id="id_book_set-1-author" /><input type="hidden" name="book_set-1-id" value="2" id="id_book_set-1-id" /></p>')
+        self.assertEqual(formset.forms[2].as_p(),
+            '<p><label for="id_book_set-2-title">Title:</label> <input id="id_book_set-2-title" type="text" name="book_set-2-title" value="Flowers of Evil" maxlength="100" /><input type="hidden" name="book_set-2-author" value="1" id="id_book_set-2-author" /><input type="hidden" name="book_set-2-id" value="3" id="id_book_set-2-id" /></p>')
+        self.assertEqual(formset.forms[3].as_p(),
+            '<p><label for="id_book_set-3-title">Title:</label> <input id="id_book_set-3-title" type="text" name="book_set-3-title" maxlength="100" /><input type="hidden" name="book_set-3-author" value="1" id="id_book_set-3-author" /><input type="hidden" name="book_set-3-id" id="id_book_set-3-id" /></p>')
+        self.assertEqual(formset.forms[4].as_p(),
+            '<p><label for="id_book_set-4-title">Title:</label> <input id="id_book_set-4-title" type="text" name="book_set-4-title" maxlength="100" /><input type="hidden" name="book_set-4-author" value="1" id="id_book_set-4-author" /><input type="hidden" name="book_set-4-id" id="id_book_set-4-id" /></p>')
+
+        data = {
+            'book_set-TOTAL_FORMS': '5', # the number of forms rendered
+            'book_set-INITIAL_FORMS': '3', # the number of forms with initial data
+            'book_set-MAX_NUM_FORMS': '', # the max number of forms
+            'book_set-0-id': str(book1.id),
+            'book_set-0-title': 'Les Paradis Artificiels',
+            'book_set-1-id': str(book2.id),
+            'book_set-1-title': 'Les Fleurs du Mal',
+            'book_set-2-id': str(book3.id),
+            'book_set-2-title': 'Flowers of Evil',
+            'book_set-3-title': 'Revue des deux mondes',
+            'book_set-4-title': '',
+        }
+        formset = AuthorBooksFormSet(data, instance=author, queryset=custom_qs)
+        self.assertTrue(formset.is_valid())
+
+        custom_qs = Book.objects.filter(title__startswith='F')
+        formset = AuthorBooksFormSet(instance=author, queryset=custom_qs)
+        self.assertEqual(formset.forms[0].as_p(),
+            '<p><label for="id_book_set-0-title">Title:</label> <input id="id_book_set-0-title" type="text" name="book_set-0-title" value="Flowers of Evil" maxlength="100" /><input type="hidden" name="book_set-0-author" value="1" id="id_book_set-0-author" /><input type="hidden" name="book_set-0-id" value="3" id="id_book_set-0-id" /></p>')
+        self.assertEqual(formset.forms[1].as_p(),
+            '<p><label for="id_book_set-1-title">Title:</label> <input id="id_book_set-1-title" type="text" name="book_set-1-title" maxlength="100" /><input type="hidden" name="book_set-1-author" value="1" id="id_book_set-1-author" /><input type="hidden" name="book_set-1-id" id="id_book_set-1-id" /></p>')
+        self.assertEqual(formset.forms[2].as_p(),
+            '<p><label for="id_book_set-2-title">Title:</label> <input id="id_book_set-2-title" type="text" name="book_set-2-title" maxlength="100" /><input type="hidden" name="book_set-2-author" value="1" id="id_book_set-2-author" /><input type="hidden" name="book_set-2-id" id="id_book_set-2-id" /></p>')
+
+        data = {
+            'book_set-TOTAL_FORMS': '3', # the number of forms rendered
+            'book_set-INITIAL_FORMS': '1', # the number of forms with initial data
+            'book_set-MAX_NUM_FORMS': '', # the max number of forms
+            'book_set-0-id': str(book3.id),
+            'book_set-0-title': 'Flowers of Evil',
+            'book_set-1-title': 'Revue des deux mondes',
+            'book_set-2-title': '',
+        }
+        formset = AuthorBooksFormSet(data, instance=author, queryset=custom_qs)
+        self.assertTrue(formset.is_valid())
+
+    def test_custom_pk(self):
+        # We need to ensure that it is displayed
+
+        CustomPrimaryKeyFormSet = modelformset_factory(CustomPrimaryKey)
+        formset = CustomPrimaryKeyFormSet()
+        self.assertEqual(len(formset.forms), 1)
+        self.assertEqual(formset.forms[0].as_p(),
+            '<p><label for="id_form-0-my_pk">My pk:</label> <input id="id_form-0-my_pk" type="text" name="form-0-my_pk" maxlength="10" /></p>\n'
+            '<p><label for="id_form-0-some_field">Some field:</label> <input id="id_form-0-some_field" type="text" name="form-0-some_field" maxlength="100" /></p>')
+
+        # Custom primary keys with ForeignKey, OneToOneField and AutoField ############
+
+        place = Place.objects.create(pk=1, name=u'Giordanos', city=u'Chicago')
+
+        FormSet = inlineformset_factory(Place, Owner, extra=2, can_delete=False)
+        formset = FormSet(instance=place)
+        self.assertEqual(len(formset.forms), 2)
+        self.assertEqual(formset.forms[0].as_p(),
+            '<p><label for="id_owner_set-0-name">Name:</label> <input id="id_owner_set-0-name" type="text" name="owner_set-0-name" maxlength="100" /><input type="hidden" name="owner_set-0-place" value="1" id="id_owner_set-0-place" /><input type="hidden" name="owner_set-0-auto_id" id="id_owner_set-0-auto_id" /></p>')
+        self.assertEqual(formset.forms[1].as_p(),
+            '<p><label for="id_owner_set-1-name">Name:</label> <input id="id_owner_set-1-name" type="text" name="owner_set-1-name" maxlength="100" /><input type="hidden" name="owner_set-1-place" value="1" id="id_owner_set-1-place" /><input type="hidden" name="owner_set-1-auto_id" id="id_owner_set-1-auto_id" /></p>')
+
+        data = {
+            'owner_set-TOTAL_FORMS': '2',
+            'owner_set-INITIAL_FORMS': '0',
+            'owner_set-MAX_NUM_FORMS': '',
+            'owner_set-0-auto_id': '',
+            'owner_set-0-name': u'Joe Perry',
+            'owner_set-1-auto_id': '',
+            'owner_set-1-name': '',
+        }
+        formset = FormSet(data, instance=place)
+        self.assertTrue(formset.is_valid())
+        saved = formset.save()
+        self.assertEqual(len(saved), 1)
+        owner, = saved
+        self.assertEqual(owner.name, 'Joe Perry')
+        self.assertEqual(owner.place.name, 'Giordanos')
+
+        formset = FormSet(instance=place)
+        self.assertEqual(len(formset.forms), 3)
+        self.assertEqual(formset.forms[0].as_p(),
+            '<p><label for="id_owner_set-0-name">Name:</label> <input id="id_owner_set-0-name" type="text" name="owner_set-0-name" value="Joe Perry" maxlength="100" /><input type="hidden" name="owner_set-0-place" value="1" id="id_owner_set-0-place" /><input type="hidden" name="owner_set-0-auto_id" value="1" id="id_owner_set-0-auto_id" /></p>')
+        self.assertEqual(formset.forms[1].as_p(),
+            '<p><label for="id_owner_set-1-name">Name:</label> <input id="id_owner_set-1-name" type="text" name="owner_set-1-name" maxlength="100" /><input type="hidden" name="owner_set-1-place" value="1" id="id_owner_set-1-place" /><input type="hidden" name="owner_set-1-auto_id" id="id_owner_set-1-auto_id" /></p>')
+        self.assertEqual(formset.forms[2].as_p(),
+            '<p><label for="id_owner_set-2-name">Name:</label> <input id="id_owner_set-2-name" type="text" name="owner_set-2-name" maxlength="100" /><input type="hidden" name="owner_set-2-place" value="1" id="id_owner_set-2-place" /><input type="hidden" name="owner_set-2-auto_id" id="id_owner_set-2-auto_id" /></p>')
+
+        data = {
+            'owner_set-TOTAL_FORMS': '3',
+            'owner_set-INITIAL_FORMS': '1',
+            'owner_set-MAX_NUM_FORMS': '',
+            'owner_set-0-auto_id': u'1',
+            'owner_set-0-name': u'Joe Perry',
+            'owner_set-1-auto_id': '',
+            'owner_set-1-name': u'Jack Berry',
+            'owner_set-2-auto_id': '',
+            'owner_set-2-name': '',
+        }
+        formset = FormSet(data, instance=place)
+        self.assertTrue(formset.is_valid())
+        saved = formset.save()
+        self.assertEqual(len(saved), 1)
+        owner, = saved
+        self.assertEqual(owner.name, 'Jack Berry')
+        self.assertEqual(owner.place.name, 'Giordanos')
+
+        # Ensure a custom primary key that is a ForeignKey or OneToOneField get rendered for the user to choose.
+
+        FormSet = modelformset_factory(OwnerProfile)
+        formset = FormSet()
+        self.assertEqual(formset.forms[0].as_p(),
+            '<p><label for="id_form-0-owner">Owner:</label> <select name="form-0-owner" id="id_form-0-owner">\n'
+            '<option value="" selected="selected">---------</option>\n'
+            '<option value="1">Joe Perry at Giordanos</option>\n'
+            '<option value="2">Jack Berry at Giordanos</option>\n'
+            '</select></p>\n'
+            '<p><label for="id_form-0-age">Age:</label> <input type="text" name="form-0-age" id="id_form-0-age" /></p>')
+
+        owner = Owner.objects.get(name=u'Joe Perry')
+        FormSet = inlineformset_factory(Owner, OwnerProfile, max_num=1, can_delete=False)
+        self.assertEqual(FormSet.max_num, 1)
+
+        formset = FormSet(instance=owner)
+        self.assertEqual(len(formset.forms), 1)
+        self.assertEqual(formset.forms[0].as_p(),
+            '<p><label for="id_ownerprofile-0-age">Age:</label> <input type="text" name="ownerprofile-0-age" id="id_ownerprofile-0-age" /><input type="hidden" name="ownerprofile-0-owner" value="1" id="id_ownerprofile-0-owner" /></p>')
+
+        data = {
+            'ownerprofile-TOTAL_FORMS': '1',
+            'ownerprofile-INITIAL_FORMS': '0',
+            'ownerprofile-MAX_NUM_FORMS': '1',
+            'ownerprofile-0-owner': '',
+            'ownerprofile-0-age': u'54',
+        }
+        formset = FormSet(data, instance=owner)
+        self.assertTrue(formset.is_valid())
+        saved = formset.save()
+        self.assertEqual(len(saved), 1)
+        profile1, = saved
+        self.assertEqual(profile1.owner, owner)
+        self.assertEqual(profile1.age, 54)
+
+        formset = FormSet(instance=owner)
+        self.assertEqual(len(formset.forms), 1)
+        self.assertEqual(formset.forms[0].as_p(),
+            '<p><label for="id_ownerprofile-0-age">Age:</label> <input type="text" name="ownerprofile-0-age" value="54" id="id_ownerprofile-0-age" /><input type="hidden" name="ownerprofile-0-owner" value="1" id="id_ownerprofile-0-owner" /></p>')
+
+        data = {
+            'ownerprofile-TOTAL_FORMS': '1',
+            'ownerprofile-INITIAL_FORMS': '1',
+            'ownerprofile-MAX_NUM_FORMS': '1',
+            'ownerprofile-0-owner': u'1',
+            'ownerprofile-0-age': u'55',
+        }
+        formset = FormSet(data, instance=owner)
+        self.assertTrue(formset.is_valid())
+        saved = formset.save()
+        self.assertEqual(len(saved), 1)
+        profile1, = saved
+        self.assertEqual(profile1.owner, owner)
+        self.assertEqual(profile1.age, 55)
+
+    def test_unique_true_enforces_max_num_one(self):
+        # ForeignKey with unique=True should enforce max_num=1
+
+        place = Place.objects.create(pk=1, name=u'Giordanos', city=u'Chicago')
+
+        FormSet = inlineformset_factory(Place, Location, can_delete=False)
+        self.assertEqual(FormSet.max_num, 1)
+
+        formset = FormSet(instance=place)
+        self.assertEqual(len(formset.forms), 1)
+        self.assertEqual(formset.forms[0].as_p(),
+            '<p><label for="id_location_set-0-lat">Lat:</label> <input id="id_location_set-0-lat" type="text" name="location_set-0-lat" maxlength="100" /></p>\n'
+            '<p><label for="id_location_set-0-lon">Lon:</label> <input id="id_location_set-0-lon" type="text" name="location_set-0-lon" maxlength="100" /><input type="hidden" name="location_set-0-place" value="1" id="id_location_set-0-place" /><input type="hidden" name="location_set-0-id" id="id_location_set-0-id" /></p>')
+
+    def test_foreign_keys_in_parents(self):
+        self.assertEqual(type(_get_foreign_key(Restaurant, Owner)), models.ForeignKey)
+        self.assertEqual(type(_get_foreign_key(MexicanRestaurant, Owner)), models.ForeignKey)
+
+    def test_unique_validation(self):
+        FormSet = modelformset_factory(Product, extra=1)
+        data = {
+            'form-TOTAL_FORMS': '1',
+            'form-INITIAL_FORMS': '0',
+            'form-MAX_NUM_FORMS': '',
+            'form-0-slug': 'car-red',
+        }
+        formset = FormSet(data)
+        self.assertTrue(formset.is_valid())
+        saved = formset.save()
+        self.assertEqual(len(saved), 1)
+        product1, = saved
+        self.assertEqual(product1.slug, 'car-red')
+
+        data = {
+            'form-TOTAL_FORMS': '1',
+            'form-INITIAL_FORMS': '0',
+            'form-MAX_NUM_FORMS': '',
+            'form-0-slug': 'car-red',
+        }
+        formset = FormSet(data)
+        self.assertFalse(formset.is_valid())
+        self.assertEqual(formset.errors, [{'slug': [u'Product with this Slug already exists.']}])
+
+    def test_unique_together_validation(self):
+        FormSet = modelformset_factory(Price, extra=1)
+        data = {
+            'form-TOTAL_FORMS': '1',
+            'form-INITIAL_FORMS': '0',
+            'form-MAX_NUM_FORMS': '',
+            'form-0-price': u'12.00',
+            'form-0-quantity': '1',
+        }
+        formset = FormSet(data)
+        self.assertTrue(formset.is_valid())
+        saved = formset.save()
+        self.assertEqual(len(saved), 1)
+        price1, = saved
+        self.assertEqual(price1.price, Decimal('12.00'))
+        self.assertEqual(price1.quantity, 1)
+
+        data = {
+            'form-TOTAL_FORMS': '1',
+            'form-INITIAL_FORMS': '0',
+            'form-MAX_NUM_FORMS': '',
+            'form-0-price': u'12.00',
+            'form-0-quantity': '1',
+        }
+        formset = FormSet(data)
+        self.assertFalse(formset.is_valid())
+        self.assertEqual(formset.errors, [{'__all__': [u'Price with this Price and Quantity already exists.']}])
+
+    def test_unique_together_with_inlineformset_factory(self):
+        # Also see bug #8882.
+
+        repository = Repository.objects.create(name=u'Test Repo')
+        FormSet = inlineformset_factory(Repository, Revision, extra=1)
+        data = {
+            'revision_set-TOTAL_FORMS': '1',
+            'revision_set-INITIAL_FORMS': '0',
+            'revision_set-MAX_NUM_FORMS': '',
+            'revision_set-0-repository': repository.pk,
+            'revision_set-0-revision': '146239817507f148d448db38840db7c3cbf47c76',
+            'revision_set-0-DELETE': '',
+        }
+        formset = FormSet(data, instance=repository)
+        self.assertTrue(formset.is_valid())
+        saved = formset.save()
+        self.assertEqual(len(saved), 1)
+        revision1, = saved
+        self.assertEqual(revision1.repository, repository)
+        self.assertEqual(revision1.revision, '146239817507f148d448db38840db7c3cbf47c76')
+
+        # attempt to save the same revision against against the same repo.
+        data = {
+            'revision_set-TOTAL_FORMS': '1',
+            'revision_set-INITIAL_FORMS': '0',
+            'revision_set-MAX_NUM_FORMS': '',
+            'revision_set-0-repository': repository.pk,
+            'revision_set-0-revision': '146239817507f148d448db38840db7c3cbf47c76',
+            'revision_set-0-DELETE': '',
+        }
+        formset = FormSet(data, instance=repository)
+        self.assertFalse(formset.is_valid())
+        self.assertEqual(formset.errors, [{'__all__': [u'Revision with this Repository and Revision already exists.']}])
+
+        # unique_together with inlineformset_factory with overridden form fields
+        # Also see #9494
+
+        FormSet = inlineformset_factory(Repository, Revision, fields=('revision',), extra=1)
+        data = {
+            'revision_set-TOTAL_FORMS': '1',
+            'revision_set-INITIAL_FORMS': '0',
+            'revision_set-MAX_NUM_FORMS': '',
+            'revision_set-0-repository': repository.pk,
+            'revision_set-0-revision': '146239817507f148d448db38840db7c3cbf47c76',
+            'revision_set-0-DELETE': '',
+        }
+        formset = FormSet(data, instance=repository)
+        self.assertFalse(formset.is_valid())
+
+    def test_callable_defaults(self):
+        # Use of callable defaults (see bug #7975).
+
+        person = Person.objects.create(name='Ringo')
+        FormSet = inlineformset_factory(Person, Membership, can_delete=False, extra=1)
+        formset = FormSet(instance=person)
+
+        # Django will render a hidden field for model fields that have a callable
+        # default. This is required to ensure the value is tested for change correctly
+        # when determine what extra forms have changed to save.
+
+        self.assertEquals(len(formset.forms), 1) # this formset only has one form
+        form = formset.forms[0]
+        now = form.fields['date_joined'].initial()
+        result = form.as_p()
+        result = re.sub(r'\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}(?:\.\d+)?', '__DATETIME__', result)
+        self.assertEqual(result,
+            '<p><label for="id_membership_set-0-date_joined">Date joined:</label> <input type="text" name="membership_set-0-date_joined" value="__DATETIME__" id="id_membership_set-0-date_joined" /><input type="hidden" name="initial-membership_set-0-date_joined" value="__DATETIME__" id="initial-membership_set-0-id_membership_set-0-date_joined" /></p>\n'
+            '<p><label for="id_membership_set-0-karma">Karma:</label> <input type="text" name="membership_set-0-karma" id="id_membership_set-0-karma" /><input type="hidden" name="membership_set-0-person" value="1" id="id_membership_set-0-person" /><input type="hidden" name="membership_set-0-id" id="id_membership_set-0-id" /></p>')
+
+        # test for validation with callable defaults. Validations rely on hidden fields
+
+        data = {
+            'membership_set-TOTAL_FORMS': '1',
+            'membership_set-INITIAL_FORMS': '0',
+            'membership_set-MAX_NUM_FORMS': '',
+            'membership_set-0-date_joined': unicode(now.strftime('%Y-%m-%d %H:%M:%S')),
+            'initial-membership_set-0-date_joined': unicode(now.strftime('%Y-%m-%d %H:%M:%S')),
+            'membership_set-0-karma': '',
+        }
+        formset = FormSet(data, instance=person)
+        self.assertTrue(formset.is_valid())
+
+        # now test for when the data changes
+
+        one_day_later = now + datetime.timedelta(days=1)
+        filled_data = {
+            'membership_set-TOTAL_FORMS': '1',
+            'membership_set-INITIAL_FORMS': '0',
+            'membership_set-MAX_NUM_FORMS': '',
+            'membership_set-0-date_joined': unicode(one_day_later.strftime('%Y-%m-%d %H:%M:%S')),
+            'initial-membership_set-0-date_joined': unicode(now.strftime('%Y-%m-%d %H:%M:%S')),
+            'membership_set-0-karma': '',
+        }
+        formset = FormSet(filled_data, instance=person)
+        self.assertFalse(formset.is_valid())
+
+        # now test with split datetime fields
+
+        class MembershipForm(forms.ModelForm):
+            date_joined = forms.SplitDateTimeField(initial=now)
+            class Meta:
+                model = Membership
+            def __init__(self, **kwargs):
+                super(MembershipForm, self).__init__(**kwargs)
+                self.fields['date_joined'].widget = forms.SplitDateTimeWidget()
+
+        FormSet = inlineformset_factory(Person, Membership, form=MembershipForm, can_delete=False, extra=1)
+        data = {
+            'membership_set-TOTAL_FORMS': '1',
+            'membership_set-INITIAL_FORMS': '0',
+            'membership_set-MAX_NUM_FORMS': '',
+            'membership_set-0-date_joined_0': unicode(now.strftime('%Y-%m-%d')),
+            'membership_set-0-date_joined_1': unicode(now.strftime('%H:%M:%S')),
+            'initial-membership_set-0-date_joined': unicode(now.strftime('%Y-%m-%d %H:%M:%S')),
+            'membership_set-0-karma': '',
+        }
+        formset = FormSet(data, instance=person)
+        self.assertTrue(formset.is_valid())
+
+    def test_inlineformset_factory_with_null_fk(self):
+        # inlineformset_factory tests with fk having null=True. see #9462.
+        # create some data that will exbit the issue
+        team = Team.objects.create(name=u"Red Vipers")
+        Player(name="Timmy").save()
+        Player(name="Bobby", team=team).save()
+
+        PlayerInlineFormSet = inlineformset_factory(Team, Player)
+        formset = PlayerInlineFormSet()
+        self.assertQuerysetEqual(formset.get_queryset(), [])
+
+        formset = PlayerInlineFormSet(instance=team)
+        players = formset.get_queryset()
+        self.assertEqual(len(players), 1)
+        player1, = players
+        self.assertEqual(player1.team, team)
+        self.assertEqual(player1.name, 'Bobby')
+
+    def test_model_formset_with_custom_pk(self):
+        # a formset for a Model that has a custom primary key that still needs to be
+        # added to the formset automatically
+        FormSet = modelformset_factory(ClassyMexicanRestaurant, fields=["tacos_are_yummy"])
+        self.assertEqual(sorted(FormSet().forms[0].fields.keys()), ['restaurant', 'tacos_are_yummy'])
+
+    def test_prevent_duplicates_from_with_the_same_formset(self):
+        FormSet = modelformset_factory(Product, extra=2)
+        data = {
+            'form-TOTAL_FORMS': 2,
+            'form-INITIAL_FORMS': 0,
+            'form-MAX_NUM_FORMS': '',
+            'form-0-slug': 'red_car',
+            'form-1-slug': 'red_car',
+        }
+        formset = FormSet(data)
+        self.assertFalse(formset.is_valid())
+        self.assertEqual(formset._non_form_errors,
+            [u'Please correct the duplicate data for slug.'])
+
+        FormSet = modelformset_factory(Price, extra=2)
+        data = {
+            'form-TOTAL_FORMS': 2,
+            'form-INITIAL_FORMS': 0,
+            'form-MAX_NUM_FORMS': '',
+            'form-0-price': '25',
+            'form-0-quantity': '7',
+            'form-1-price': '25',
+            'form-1-quantity': '7',
+        }
+        formset = FormSet(data)
+        self.assertFalse(formset.is_valid())
+        self.assertEqual(formset._non_form_errors,
+            [u'Please correct the duplicate data for price and quantity, which must be unique.'])
+
+        # Only the price field is specified, this should skip any unique checks since
+        # the unique_together is not fulfilled. This will fail with a KeyError if broken.
+        FormSet = modelformset_factory(Price, fields=("price",), extra=2)
+        data = {
+            'form-TOTAL_FORMS': '2',
+            'form-INITIAL_FORMS': '0',
+            'form-MAX_NUM_FORMS': '',
+            'form-0-price': '24',
+            'form-1-price': '24',
+        }
+        formset = FormSet(data)
+        self.assertTrue(formset.is_valid())
+
+        FormSet = inlineformset_factory(Author, Book, extra=0)
+        author = Author.objects.create(pk=1, name='Charles Baudelaire')
+        book1 = Book.objects.create(pk=1, author=author, title='Les Paradis Artificiels')
+        book2 = Book.objects.create(pk=2, author=author, title='Les Fleurs du Mal')
+        book3 = Book.objects.create(pk=3, author=author, title='Flowers of Evil')
+
+        book_ids = author.book_set.order_by('id').values_list('id', flat=True)
+        data = {
+            'book_set-TOTAL_FORMS': '2',
+            'book_set-INITIAL_FORMS': '2',
+            'book_set-MAX_NUM_FORMS': '',
+
+            'book_set-0-title': 'The 2008 Election',
+            'book_set-0-author': str(author.id),
+            'book_set-0-id': str(book_ids[0]),
+
+            'book_set-1-title': 'The 2008 Election',
+            'book_set-1-author': str(author.id),
+            'book_set-1-id': str(book_ids[1]),
+        }
+        formset = FormSet(data=data, instance=author)
+        self.assertFalse(formset.is_valid())
+        self.assertEqual(formset._non_form_errors,
+            [u'Please correct the duplicate data for title.'])
+        self.assertEqual(formset.errors,
+            [{}, {'__all__': u'Please correct the duplicate values below.'}])
+
+        FormSet = modelformset_factory(Post, extra=2)
+        data = {
+            'form-TOTAL_FORMS': '2',
+            'form-INITIAL_FORMS': '0',
+            'form-MAX_NUM_FORMS': '',
+
+            'form-0-title': 'blah',
+            'form-0-slug': 'Morning',
+            'form-0-subtitle': 'foo',
+            'form-0-posted': '2009-01-01',
+            'form-1-title': 'blah',
+            'form-1-slug': 'Morning in Prague',
+            'form-1-subtitle': 'rawr',
+            'form-1-posted': '2009-01-01'
+        }
+        formset = FormSet(data)
+        self.assertFalse(formset.is_valid())
+        self.assertEqual(formset._non_form_errors,
+            [u'Please correct the duplicate data for title which must be unique for the date in posted.'])
+        self.assertEqual(formset.errors,
+            [{}, {'__all__': u'Please correct the duplicate values below.'}])
+
+        data = {
+            'form-TOTAL_FORMS': '2',
+            'form-INITIAL_FORMS': '0',
+            'form-MAX_NUM_FORMS': '',
+
+            'form-0-title': 'foo',
+            'form-0-slug': 'Morning in Prague',
+            'form-0-subtitle': 'foo',
+            'form-0-posted': '2009-01-01',
+            'form-1-title': 'blah',
+            'form-1-slug': 'Morning in Prague',
+            'form-1-subtitle': 'rawr',
+            'form-1-posted': '2009-08-02'
+        }
+        formset = FormSet(data)
+        self.assertFalse(formset.is_valid())
+        self.assertEqual(formset._non_form_errors,
+            [u'Please correct the duplicate data for slug which must be unique for the year in posted.'])
+
+        data = {
+            'form-TOTAL_FORMS': '2',
+            'form-INITIAL_FORMS': '0',
+            'form-MAX_NUM_FORMS': '',
+
+            'form-0-title': 'foo',
+            'form-0-slug': 'Morning in Prague',
+            'form-0-subtitle': 'rawr',
+            'form-0-posted': '2008-08-01',
+            'form-1-title': 'blah',
+            'form-1-slug': 'Prague',
+            'form-1-subtitle': 'rawr',
+            'form-1-posted': '2009-08-02'
+        }
+        formset = FormSet(data)
+        self.assertFalse(formset.is_valid())
+        self.assertEqual(formset._non_form_errors,
+            [u'Please correct the duplicate data for subtitle which must be unique for the month in posted.'])