Fixed #8027: correctly validate fields/fieldsets in `ModelAdmin` validation when using custom `ModelForm`s.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@8662 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/contrib/admin/validation.py

@@ -251,7 +251,7 @@ def get_field(cls, model, opts, label, field):
                 % (cls.__name__, label, field, model.__name__))
 
 def check_formfield(cls, model, opts, label, field):
-    if hasattr(cls.form, 'base_fields'):
+    if getattr(cls.form, 'base_fields', None):
         try:
             cls.form.base_fields[field]
         except KeyError:

tests/regressiontests/admin_validation/models.py

@@ -0,0 +1,43 @@
+"""
+Tests of ModelAdmin validation logic.
+"""
+
+from django.db import models
+
+class Song(models.Model):
+    title = models.CharField(max_length=150)
+    
+    class Meta:
+        ordering = ('title',)
+        
+    def __unicode__(self):
+        return self.title
+
+__test__ = {'API_TESTS':"""
+
+>>> from django import forms
+>>> from django.contrib import admin
+>>> from django.contrib.admin.validation import validate
+
+#
+# Regression test for #8027: custom ModelForms with fields/fieldsets
+#
+
+>>> class SongForm(forms.ModelForm):
+...     pass
+
+>>> class ValidFields(admin.ModelAdmin):
+...     form = SongForm
+...     fields = ['title']
+
+>>> class InvalidFields(admin.ModelAdmin):
+...     form = SongForm
+...     fields = ['spam']
+
+>>> validate(ValidFields, Song)
+>>> validate(InvalidFields, Song)
+Traceback (most recent call last):
+    ...
+ImproperlyConfigured: 'InvalidFields.fields' refers to field 'spam' that is missing from the form.
+
+"""}