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, inlineformset_factory,
    modelformset_factory, 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):
        PoetFormSet = modelformset_factory(Poet, can_delete=True)
        poet = Poet.objects.create(name='test')
        data = {
            'form-TOTAL_FORMS': u'1',
            'form-INITIAL_FORMS': u'1',
            'form-MAX_NUM_FORMS': u'0',
            'form-0-id': str(poet.pk),
            'form-0-name': u'test',
            'form-0-DELETE': u'on',
        }
        formset = PoetFormSet(data, queryset=Poet.objects.all())
        formset.save()
        self.assertTrue(formset.is_valid())
        self.assertEqual(Poet.objects.count(), 0)

    def test_add_form_deletion_when_invalid(self):
        """
        Make sure that an add form that is filled out, but marked for deletion
        doesn't cause validation errors.
        """
        PoetFormSet = modelformset_factory(Poet, can_delete=True)
        data = {
            'form-TOTAL_FORMS': u'1',
            'form-INITIAL_FORMS': u'0',
            'form-MAX_NUM_FORMS': u'0',
            'form-0-id': u'',
            'form-0-name': u'x' * 1000,
        }
        formset = PoetFormSet(data, queryset=Poet.objects.all())
        # Make sure this form doesn't pass validation.
        self.assertEqual(formset.is_valid(), False)
        self.assertEqual(Poet.objects.count(), 0)

        # Then make sure that it *does* pass validation and delete the object,
        # even though the data isn't actually valid.
        data['form-0-DELETE'] = 'on'
        formset = PoetFormSet(data, queryset=Poet.objects.all())
        self.assertEqual(formset.is_valid(), True)
        formset.save()
        self.assertEqual(Poet.objects.count(), 0)

    def test_change_form_deletion_when_invalid(self):
        """
        Make sure that an add form that is filled out, but marked for deletion
        doesn't cause validation errors.
        """
        PoetFormSet = modelformset_factory(Poet, can_delete=True)
        poet = Poet.objects.create(name='test')
        data = {
            'form-TOTAL_FORMS': u'1',
            'form-INITIAL_FORMS': u'1',
            'form-MAX_NUM_FORMS': u'0',
            'form-0-id': u'1',
            'form-0-name': u'x' * 1000,
        }
        formset = PoetFormSet(data, queryset=Poet.objects.all())
        # Make sure this form doesn't pass validation.
        self.assertEqual(formset.is_valid(), False)
        self.assertEqual(Poet.objects.count(), 1)

        # Then make sure that it *does* pass validation and delete the object,
        # even though the data isn't actually valid.
        data['form-0-DELETE'] = 'on'
        formset = PoetFormSet(data, queryset=Poet.objects.all())
        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.assertEqual(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.'])