newforms: The Form classes created by form_for_model() now have a create() method, which creates a model instance from the clean_data

git-svn-id: http://code.djangoproject.com/svn/django/trunk@4216 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/newforms/models.py

@@ -7,6 +7,15 @@ from forms import BaseForm, DeclarativeFieldsMetaclass, SortedDictFromList
 
 __all__ = ('form_for_model', 'form_for_fields')
 
+def create(self, save=True):
+    "Creates and returns model instance according to self.clean_data."
+    if self.errors:
+        raise ValueError("The %s could not be created because the data didn't validate." % self._model._meta.object_name)
+    obj = self._model(**self.clean_data)
+    if save:
+        obj.save()
+    return obj
+
 def form_for_model(model):
     "Returns a Form class for the given Django model class."
     opts = model._meta
@@ -16,7 +25,7 @@ def form_for_model(model):
         if formfield:
             field_list.append((f.name, formfield))
     fields = SortedDictFromList(field_list)
-    return type(opts.object_name + 'Form', (BaseForm,), {'fields': fields, '_model_opts': opts})
+    return type(opts.object_name + 'Form', (BaseForm,), {'fields': fields, '_model': model, 'create': create})
 
 def form_for_fields(field_list):
     "Returns a Form class for the given list of Django database field instances."