Fixed #17642 -- Added min_num support to modelformsets, inlines, and the admin.

Thanks Stephen Burrows for work on the patch as well.

Forwardport of 2914f66983a92fcae55673c517dd8d01e8c238c4 from stable/1.7.x

1 files changed, 27 insertions, 0 deletions

diff --git a/tests/model_formsets/tests.py b/tests/model_formsets/tests.py
index b5e410738e..ed74dff2ed 100644
--- a/tests/model_formsets/tests.py
+++ b/tests/model_formsets/tests.py
@@ -376,6 +376,33 @@ class ModelFormsetTest(TestCase):
             '<Author: Walt Whitman>',
         ])
 
+    def test_min_num(self):
+        # Test the behavior of min_num with model formsets. It should be
+        # added to extra.
+        qs = Author.objects.none()
+
+        AuthorFormSet = modelformset_factory(Author, fields="__all__", extra=0)
+        formset = AuthorFormSet(queryset=qs)
+        self.assertEqual(len(formset.forms), 0)
+
+        AuthorFormSet = modelformset_factory(Author, fields="__all__", min_num=1, extra=0)
+        formset = AuthorFormSet(queryset=qs)
+        self.assertEqual(len(formset.forms), 1)
+
+        AuthorFormSet = modelformset_factory(Author, fields="__all__", min_num=1, extra=1)
+        formset = AuthorFormSet(queryset=qs)
+        self.assertEqual(len(formset.forms), 2)
+
+    def test_min_num_with_existing(self):
+        # Test the behavior of min_num with existing objects.
+        # See #22628 - this will change when that's fixed.
+        Author.objects.create(name='Charles Baudelaire')
+        qs = Author.objects.all()
+
+        AuthorFormSet = modelformset_factory(Author, fields="__all__", extra=0, min_num=1)
+        formset = AuthorFormSet(queryset=qs)
+        self.assertEqual(len(formset.forms), 2)
+
     def test_custom_save_method(self):
         class PoetForm(forms.ModelForm):
             def save(self, commit=True):