Fixed #8160 -- Made sure modelformset_factory takes in account fields' and exclude` ModelForm options.

Thanks Andrew McMurry for the report and Claude Paroz for creating these tests.

(Actually, this had been fixed in r10619 but the tests added then exercise the
code in the context of ModelAdmin. This commit adds more generic tests.)

git-svn-id: http://code.djangoproject.com/svn/django/trunk@16918 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/modeltests/model_formsets/tests.py

@@ -6,7 +6,7 @@ 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)
+    modelformset_factory)
 from django.test import TestCase, skipUnlessDBFeature
 
 from modeltests.model_formsets.models import (
@@ -353,6 +353,28 @@ class ModelFormsetTest(TestCase):
         self.assertEqual(poet1.name, 'Vladimir Mayakovsky')
         self.assertEqual(poet2.name, 'Vladimir Mayakovsky')
 
+    def test_custom_form(self):
+        """ Test that model_formset respects fields and exclude parameters of
+            custom form
+        """
+        class PostForm1(forms.ModelForm):
+            class Meta:
+                model = Post
+                fields = ('title', 'posted')
+
+        class PostForm2(forms.ModelForm):
+            class Meta:
+                model = Post
+                exclude = ('subtitle',)
+
+        PostFormSet = modelformset_factory(Post, form=PostForm1)
+        formset = PostFormSet()
+        self.assertFalse("subtitle" in formset.forms[0].fields)
+
+        PostFormSet = modelformset_factory(Post, form=PostForm2)
+        formset = PostFormSet()
+        self.assertFalse("subtitle" in formset.forms[0].fields)
+
     def test_model_inheritance(self):
         BetterAuthorFormSet = modelformset_factory(BetterAuthor)
         formset = BetterAuthorFormSet()