from django.forms.models import ModelForm, inlineformset_factory from django.test import TestCase, skipUnlessDBFeature from .models import Child, Parent, Poem, Poet, School class DeletionTests(TestCase): def test_deletion(self): PoemFormSet = inlineformset_factory(Poet, Poem, can_delete=True, fields="__all__") poet = Poet.objects.create(name='test') poem = poet.poem_set.create(name='test poem') data = { 'poem_set-TOTAL_FORMS': '1', 'poem_set-INITIAL_FORMS': '1', 'poem_set-MAX_NUM_FORMS': '0', 'poem_set-0-id': str(poem.pk), 'poem_set-0-poet': str(poet.pk), 'poem_set-0-name': 'test', 'poem_set-0-DELETE': 'on', } formset = PoemFormSet(data, instance=poet) formset.save() self.assertTrue(formset.is_valid()) self.assertEqual(Poem.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. """ PoemFormSet = inlineformset_factory(Poet, Poem, can_delete=True, fields="__all__") poet = Poet.objects.create(name='test') data = { 'poem_set-TOTAL_FORMS': '1', 'poem_set-INITIAL_FORMS': '0', 'poem_set-MAX_NUM_FORMS': '0', 'poem_set-0-id': '', 'poem_set-0-poem': '1', 'poem_set-0-name': 'x' * 1000, } formset = PoemFormSet(data, instance=poet) # Make sure this form doesn't pass validation. self.assertIs(formset.is_valid(), False) self.assertEqual(Poem.objects.count(), 0) # Then make sure that it *does* pass validation and delete the object, # even though the data isn't actually valid. data['poem_set-0-DELETE'] = 'on' formset = PoemFormSet(data, instance=poet) self.assertIs(formset.is_valid(), True) formset.save() self.assertEqual(Poem.objects.count(), 0) def test_change_form_deletion_when_invalid(self): """ Make sure that a change form that is filled out, but marked for deletion doesn't cause validation errors. """ PoemFormSet = inlineformset_factory(Poet, Poem, can_delete=True, fields="__all__") poet = Poet.objects.create(name='test') poem = poet.poem_set.create(name='test poem') data = { 'poem_set-TOTAL_FORMS': '1', 'poem_set-INITIAL_FORMS': '1', 'poem_set-MAX_NUM_FORMS': '0', 'poem_set-0-id': str(poem.id), 'poem_set-0-poem': str(poem.id), 'poem_set-0-name': 'x' * 1000, } formset = PoemFormSet(data, instance=poet) # Make sure this form doesn't pass validation. self.assertIs(formset.is_valid(), False) self.assertEqual(Poem.objects.count(), 1) # Then make sure that it *does* pass validation and delete the object, # even though the data isn't actually valid. data['poem_set-0-DELETE'] = 'on' formset = PoemFormSet(data, instance=poet) self.assertIs(formset.is_valid(), True) formset.save() self.assertEqual(Poem.objects.count(), 0) def test_save_new(self): """ Make sure inlineformsets respect commit=False regression for #10750 """ # exclude some required field from the forms ChildFormSet = inlineformset_factory(School, Child, exclude=['father', 'mother']) school = School.objects.create(name='test') mother = Parent.objects.create(name='mother') father = Parent.objects.create(name='father') data = { 'child_set-TOTAL_FORMS': '1', 'child_set-INITIAL_FORMS': '0', 'child_set-MAX_NUM_FORMS': '0', 'child_set-0-name': 'child', } formset = ChildFormSet(data, instance=school) self.assertIs(formset.is_valid(), True) objects = formset.save(commit=False) for obj in objects: obj.mother = mother obj.father = father obj.save() self.assertEqual(school.child_set.count(), 1) class InlineFormsetFactoryTest(TestCase): def test_inline_formset_factory(self): """ These should both work without a problem. """ inlineformset_factory(Parent, Child, fk_name='mother', fields="__all__") inlineformset_factory(Parent, Child, fk_name='father', fields="__all__") def test_exception_on_unspecified_foreign_key(self): """ Child has two ForeignKeys to Parent, so if we don't specify which one to use for the inline formset, we should get an exception. """ msg = "'inline_formsets.Child' has more than one ForeignKey to 'inline_formsets.Parent'." with self.assertRaisesMessage(ValueError, msg): inlineformset_factory(Parent, Child) def test_fk_name_not_foreign_key_field_from_child(self): """ If we specify fk_name, but it isn't a ForeignKey from the child model to the parent model, we should get an exception. """ msg = "fk_name 'school' is not a ForeignKey to 'inline_formsets.Parent'." with self.assertRaisesMessage(ValueError, msg): inlineformset_factory(Parent, Child, fk_name='school') def test_non_foreign_key_field(self): """ If the field specified in fk_name is not a ForeignKey, we should get an exception. """ with self.assertRaisesMessage(ValueError, "'inline_formsets.Child' has no field named 'test'."): inlineformset_factory(Parent, Child, fk_name='test') def test_any_iterable_allowed_as_argument_to_exclude(self): # Regression test for #9171. inlineformset_factory( Parent, Child, exclude=['school'], fk_name='mother' ) inlineformset_factory( Parent, Child, exclude=('school',), fk_name='mother' ) @skipUnlessDBFeature('allows_auto_pk_0') def test_zero_primary_key(self): # Regression test for #21472 poet = Poet.objects.create(id=0, name='test') poet.poem_set.create(name='test poem') PoemFormSet = inlineformset_factory(Poet, Poem, fields="__all__", extra=0) formset = PoemFormSet(None, instance=poet) self.assertEqual(len(formset.forms), 1) def test_unsaved_fk_validate_unique(self): poet = Poet(name='unsaved') PoemFormSet = inlineformset_factory(Poet, Poem, fields=['name']) data = { 'poem_set-TOTAL_FORMS': '2', 'poem_set-INITIAL_FORMS': '0', 'poem_set-MAX_NUM_FORMS': '2', 'poem_set-0-name': 'Poem', 'poem_set-1-name': 'Poem', } formset = PoemFormSet(data, instance=poet) self.assertFalse(formset.is_valid()) self.assertEqual(formset.non_form_errors(), ['Please correct the duplicate data for name.']) def test_fk_not_duplicated_in_form_fields(self): """ A foreign key name isn't duplicated in form._meta fields (#21332). """ poet = Poet.objects.create(name='test') poet.poem_set.create(name='first test poem') poet.poem_set.create(name='second test poem') poet.poem_set.create(name='third test poem') PoemFormSet = inlineformset_factory(Poet, Poem, fields=('name',), extra=0) formset = PoemFormSet(None, instance=poet) self.assertEqual(len(formset.forms), 3) self.assertEqual(['name', 'poet'], PoemFormSet.form._meta.fields) def test_fk_in_all_formset_forms(self): """ A foreign key field is in Meta for all forms in the formset (#26538). """ class PoemModelForm(ModelForm): def __init__(self, *args, **kwargs): assert 'poet' in self._meta.fields super().__init__(*args, **kwargs) poet = Poet.objects.create(name='test') poet.poem_set.create(name='first test poem') poet.poem_set.create(name='second test poem') PoemFormSet = inlineformset_factory(Poet, Poem, form=PoemModelForm, fields=('name',), extra=0) formset = PoemFormSet(None, instance=poet) formset.forms # Trigger form instantiation to run the assert above.