Fixed #14642 -- Fixed generic inline formsets crash when using save_as_new=True.

1 files changed, 37 insertions, 0 deletions

diff --git a/tests/generic_relations/test_forms.py b/tests/generic_relations/test_forms.py
index bed31034be..99ae882693 100644
--- a/tests/generic_relations/test_forms.py
+++ b/tests/generic_relations/test_forms.py
@@ -200,3 +200,40 @@ id="id_generic_relations-taggeditem-content_type-object_id-1-id" /></p>""" % tag
         self.assertTrue(formset.is_valid())
         new_obj, = formset.save()
         self.assertNotIsInstance(new_obj.obj, ProxyRelatedModel)
+
+    def test_initial_count(self):
+        GenericFormSet = generic_inlineformset_factory(TaggedItem)
+        data = {
+            'form-TOTAL_FORMS': '3',
+            'form-INITIAL_FORMS': '3',
+            'form-MAX_NUM_FORMS': '',
+        }
+        formset = GenericFormSet(data=data, prefix='form')
+        self.assertEqual(formset.initial_form_count(), 3)
+        formset = GenericFormSet(data=data, prefix='form', save_as_new=True)
+        self.assertEqual(formset.initial_form_count(), 0)
+
+    def test_save_as_new(self):
+        """
+        The save_as_new parameter creates new items that are associated with
+        the object.
+        """
+        lion = Animal.objects.create(common_name='Lion', latin_name='Panthera leo')
+        yellow = lion.tags.create(tag='yellow')
+        hairy = lion.tags.create(tag='hairy')
+        GenericFormSet = generic_inlineformset_factory(TaggedItem)
+        data = {
+            'form-TOTAL_FORMS': '3',
+            'form-INITIAL_FORMS': '2',
+            'form-MAX_NUM_FORMS': '',
+            'form-0-id': str(yellow.pk),
+            'form-0-tag': 'hunts',
+            'form-1-id': str(hairy.pk),
+            'form-1-tag': 'roars',
+        }
+        formset = GenericFormSet(data, instance=lion, prefix='form', save_as_new=True)
+        self.assertTrue(formset.is_valid())
+        tags = formset.save()
+        self.assertEqual([tag.tag for tag in tags], ['hunts', 'roars'])
+        hunts, roars = tags
+        self.assertSequenceEqual(lion.tags.order_by('tag'), [hairy, hunts, roars, yellow])