Forms are better

taggit/forms.py

@@ -3,16 +3,9 @@ from django import forms
 from taggit.utils import parse_tags
 
 
-class TaggableForm(forms.ModelForm):
-    tags = forms.CharField(help_text="A comma seperated list of tags.")
-    
-    def save(self, commit=True):
-        obj = super(TaggableForm, self).save(commit=commit)
-        def save_tags():
-            # TODO: Remove the assumption that the manager is named 'tags'
-            obj.tags.set(*parse_tags(self.cleaned_data['tags']))
-        if commit:
-            save_tags()
-        else:
-            obj.save_tags = save_tags
-        return obj
+class TagField(forms.CharField):
+    def clean(self, value):
+        try:
+            return parse_tags(value)
+        except ValueError:
+            raise forms.ValidationError("Please provide a comma seperate list of tags.")

taggit/managers.py

@@ -3,6 +3,7 @@ from django.db import models
 from django.db.models.fields.related import ManyToManyRel
 from django.db.models.query_utils import QueryWrapper
 
+from taggit.forms import TagField
 from taggit.models import Tag, TaggedItem
 from taggit.utils import require_instance_manager
 
@@ -20,7 +21,7 @@ class TaggableRel(ManyToManyRel):
 class TaggableManager(object):
     def __init__(self):
         self.rel = TaggableRel()
-        self.editable = False
+        self.editable = True
         self.unique = False
         self.creates_table = False
         self.db_column = None
@@ -41,7 +42,7 @@ class TaggableManager(object):
         setattr(cls, name, self)
 
     def save_form_data(self, instance, value):
-        pass
+        getattr(instance, self.name).set(*value)
     
     def get_db_prep_lookup(self, lookup_type, value):
         if lookup_type not in  ("in", "exact"):
@@ -62,6 +63,14 @@ class TaggableManager(object):
         sql, params = qs.values_list("pk", flat=True).query.as_sql()
         return QueryWrapper(("(%s)" % sql), params)
     
+    def formfield(self, form_class=TagField, **kwargs):
+        defaults = {
+            "label": "Tags",
+            "help_text": "A comma seperated list of tags."
+        }
+        defaults.update(kwargs)
+        return form_class(**kwargs)
+    
     def related_query_name(self):
         return None
     

taggit/tests/forms.py

-from taggit.forms import TaggableForm
+from django import forms
 
 from taggit.tests.models import Food
 
 
-class FoodForm(TaggableForm):
+class FoodForm(forms.ModelForm):
     class Meta:
         model = Food

taggit/tests/tests.py

@@ -7,8 +7,7 @@ from taggit.tests.models import Food, Pet
 
 class BaseTaggingTest(TestCase):
     def assert_tags_equal(self, qs, tags):
-        tags = Tag.objects.filter(name__in=tags)
-        self.assertEqual(list(qs), list(tags))
+        self.assertEqual(map(lambda tag: tag.name, qs), list(tags))
 
 
 class AddTagTestCase(BaseTaggingTest):
@@ -65,6 +64,5 @@ class TaggableFormTestCase(BaseTaggingTest):
         
         f = FoodForm({'name': 'apple', 'tags': 'green, red, yummy'})
         f.save()
-        
         apple = Food.objects.get(name='apple')
         self.assert_tags_equal(apple.tags.all(), ['green', 'red', 'yummy'])