newforms: Added optional 'form' parameter to form_for_model

git-svn-id: http://code.djangoproject.com/svn/django/trunk@4220 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/newforms/models.py

@@ -16,8 +16,12 @@ def create(self, save=True):
         obj.save()
     return obj
 
-def form_for_model(model):
-    "Returns a Form class for the given Django model class."
+def form_for_model(model, form=None):
+    """
+    Returns a Form class for the given Django model class.
+
+    Provide 'form' if you want to use a custom BaseForm subclass.
+    """
     opts = model._meta
     field_list = []
     for f in opts.fields + opts.many_to_many:
@@ -25,7 +29,8 @@ 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': model, 'create': create})
+    form = form or BaseForm
+    return type(opts.object_name + 'Form', (form,), {'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."

tests/modeltests/model_forms/models.py

@@ -29,7 +29,7 @@ class Article(models.Model):
         return self.headline
 
 __test__ = {'API_TESTS': """
->>> from django.newforms import form_for_model
+>>> from django.newforms import form_for_model, BaseForm
 
 >>> Category.objects.all()
 []
@@ -101,4 +101,13 @@ Traceback (most recent call last):
 ...
 ValueError: The Category could not be created because the data didn't validate.
 
+You can pass a custom Form class to form_for_model. Make sure it's a
+subclass of BaseForm, not Form.
+>>> class CustomForm(BaseForm):
+...     def say_hello(self):
+...         print 'hello'
+>>> CategoryForm = form_for_model(Category, form=CustomForm)
+>>> f = CategoryForm()
+>>> f.say_hello()
+hello
 """}