Fixed #10059: `ModelAdmin.formfield_for_dbfield` now handles custom `Field` subclasses. Thanks, Alex Gaynor.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@10454 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/contrib/admin/options.py

@@ -108,9 +108,10 @@ class BaseModelAdmin(object):
 
         # If we've got overrides for the formfield defined, use 'em. **kwargs
         # passed to formfield_for_dbfield override the defaults.
-        if db_field.__class__ in self.formfield_overrides:
-            kwargs = dict(self.formfield_overrides[db_field.__class__], **kwargs)
-            return db_field.formfield(**kwargs)
+        for klass in db_field.__class__.mro(): 
+            if klass in self.formfield_overrides: 
+                kwargs = dict(self.formfield_overrides[klass], **kwargs) 
+                return db_field.formfield(**kwargs) 
 
         # For any other type of field, just call its formfield() method.
         return db_field.formfield(**kwargs)

tests/regressiontests/admin_widgets/models.py

@@ -4,6 +4,9 @@ from django.db import models
 from django.core.files.storage import default_storage
 from django.contrib.auth.models import User
 
+class MyFileField(models.FileField): 
+    pass 
+
 class Member(models.Model):
     name = models.CharField(max_length=100)
     birthdate = models.DateTimeField(blank=True, null=True)
@@ -23,6 +26,7 @@ class Album(models.Model):
     band = models.ForeignKey(Band)
     name = models.CharField(max_length=100)
     cover_art = models.FileField(upload_to='albums')
+    backside_art = MyFileField(upload_to='albums_back', null=True)
 
     def __unicode__(self):
         return self.name

tests/regressiontests/admin_widgets/tests.py

@@ -98,6 +98,8 @@ class AdminFormfieldForDBFieldTests(TestCase):
         self.assertFormfield(models.Member, 'gender', widgets.AdminRadioSelect,
                              radio_fields={'gender':admin.VERTICAL})
 
+    def testInheritance(self):
+        self.assertFormfield(models.Album, 'backside_art', widgets.AdminFileWidget)
 
 class AdminFormfieldForDBFieldWithRequestTests(DjangoTestCase):
     fixtures = ["admin-widgets-users.xml"]