Fixed #8040 -- SlugField now returns a proper formfield to deal with validation. Thanks Daniel Pope for the ticket and patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@8477 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/db/models/fields/__init__.py

@@ -890,6 +890,13 @@ class SlugField(CharField):
     def get_internal_type(self):
         return "SlugField"
 
+    def formfield(self, **kwargs):
+        defaults = {'form_class': forms.RegexField, 'regex': r'^[a-zA-Z0-9_-]+$',
+            'error_messages': {'invalid': _(u"Enter a valid 'slug' consisting of letters, numbers, underscores or hyphens.")},
+        }
+        defaults.update(kwargs)
+        return super(SlugField, self).formfield(**defaults)
+
 class SmallIntegerField(IntegerField):
     def get_manipulator_field_objs(self):
         return [oldforms.SmallIntegerField]

docs/modelforms.txt

@@ -65,7 +65,8 @@ the full list of conversions:
                                      (from ``django.contrib.localflavor.us``)
     ``PositiveIntegerField``         ``IntegerField``
     ``PositiveSmallIntegerField``    ``IntegerField``
-    ``SlugField``                    ``CharField``
+    ``SlugField``                    ``RegexField`` accepting only letters,
+                                     numbers, underscores and hyphens
     ``SmallIntegerField``            ``IntegerField``
     ``TextField``                    ``CharField`` with ``widget=Textarea``
     ``TimeField``                    ``TimeField``

tests/modeltests/model_forms/models.py

@@ -301,11 +301,11 @@ u'third-test'
 [<Category: Entertainment>, <Category: It's a test>, <Category: Third test>]
 
 If you call save() with invalid data, you'll get a ValueError.
->>> f = CategoryForm({'name': '', 'slug': '', 'url': 'foo'})
+>>> f = CategoryForm({'name': '', 'slug': 'not a slug!', 'url': 'foo'})
 >>> f.errors['name']
 [u'This field is required.']
 >>> f.errors['slug']
-[u'This field is required.']
+[u"Enter a valid 'slug' consisting of letters, numbers, underscores or hyphens."]
 >>> f.cleaned_data
 Traceback (most recent call last):
 ...