Forms in model formsets and inline formsets can now be deleted even if they don't validate. Related to #9587.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@10283 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/modeltests/model_formsets/tests.py

@@ -0,0 +1,70 @@
+from django.test import TestCase
+from django.forms.models import modelformset_factory
+from modeltests.model_formsets.models import Poet, Poem
+
+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-0-id': u'1',
+            '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-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-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)