Fixed #7947 -- Handle the display of OneToOneField in model forms cor…

…rectly. Thanks tyson for the report and original patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@8469 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/contrib/admin/options.py

@@ -128,7 +128,10 @@ def formfield_for_dbfield(self, db_field, **kwargs):
             formfield = db_field.formfield(**kwargs)
             # Don't wrap raw_id fields. Their add function is in the popup window.
             if not db_field.name in self.raw_id_fields:
-                formfield.widget = widgets.RelatedFieldWidgetWrapper(formfield.widget, db_field.rel, self.admin_site)
+                # formfield can be None if it came from a OneToOneField with
+                # parent_link=True
+                if formfield is not None:
+                    formfield.widget = widgets.RelatedFieldWidgetWrapper(formfield.widget, db_field.rel, self.admin_site)
             return formfield
 
         # For any other type of field, just call its formfield() method.

django/db/models/fields/related.py

@@ -744,7 +744,6 @@ class OneToOneField(ForeignKey):
     """
     def __init__(self, to, to_field=None, **kwargs):
         kwargs['unique'] = True
-        kwargs['editable'] = False
         if 'num_in_admin' not in kwargs:
             kwargs['num_in_admin'] = 0
         super(OneToOneField, self).__init__(to, to_field, OneToOneRel, **kwargs)
@@ -754,6 +753,11 @@ def contribute_to_related_class(self, cls, related):
                 SingleRelatedObjectDescriptor(related))
         if not cls._meta.one_to_one_field:
             cls._meta.one_to_one_field = self
+
+    def formfield(self, **kwargs):
+        if self.rel.parent_link:
+            return None
+        return super(OneToOneField, self).formfield(**kwargs)
 
 class ManyToManyField(RelatedField, Field):
     def __init__(self, to, **kwargs):

tests/modeltests/model_forms/models.py

@@ -54,6 +54,12 @@ def save(self):
     def __unicode__(self):
         return self.headline
 
+class ImprovedArticle(models.Model):
+    article = models.OneToOneField(Article)
+
+class ImprovedArticleWithParentLink(models.Model):
+    article = models.OneToOneField(Article, parent_link=True)
+
 class PhoneNumber(models.Model):
     phone = models.PhoneNumberField()
     description = models.CharField(max_length=20)
@@ -773,6 +779,20 @@ def __unicode__(self):
 >>> list(f.choices)
 [(1L, 'multicategory Entertainment'), (2L, "multicategory It's a test"), (3L, 'multicategory Third'), (4L, 'multicategory Fourth')]
 
+# OneToOneField ###############################################################
+
+>>> class ImprovedArticleForm(ModelForm):
+...     class Meta:
+...         model = ImprovedArticle
+>>> ImprovedArticleForm.base_fields.keys()
+['article']
+
+>>> class ImprovedArticleWithParentLinkForm(ModelForm):
+...     class Meta:
+...         model = ImprovedArticleWithParentLink
+>>> ImprovedArticleWithParentLinkForm.base_fields.keys()
+[]
+
 # PhoneNumberField ############################################################
 
 >>> class PhoneNumberForm(ModelForm):