id,summary,reporter,owner,description,type,status,component,version,severity,resolution,keywords,cc,stage,has_patch,needs_docs,needs_tests,needs_better_patch,easy,ui_ux 21615,contenttypes/generic.py regression from 1.6 --> 1.6.1,kz26,nobody,"Model: {{{ class Post(models.Model): class Meta: ordering = ['-modified'] eid = models.CharField(max_length=40, blank=True, db_index=True) user = models.ForeignKey(settings.AUTH_USER_MODEL) school = models.ForeignKey(School) title = models.CharField(max_length=255, validators=[MinLengthValidator(5)]) category = models.CharField(max_length=3, choices=ORIENTATION_CHOICES) affiliation = models.CharField(max_length=3, choices=AFFILIATION_CHOICES) age = models.CharField(max_length=255, help_text='Use a comma-separated list to enter more than one age, e.g. for couples and groups') external_replies = models.BooleanField(default=True) message = models.TextField() date = models.DateTimeField(default=timezone.now) modified = models.DateTimeField(null=True, blank=True) deleted = models.BooleanField(default=False) expiration = models.DateTimeField() replied = models.ManyToManyField(settings.AUTH_USER_MODEL, blank=True, related_name=""+"") files = generic.GenericRelation(UploadedFile) }}} ModelForm: {{{ class PostForm(forms.ModelForm): class Meta: model = Post fields = ('title', 'affiliation', 'category', 'age', 'external_replies', 'message', 'files') message = HTMLField(widget=CKEditorArea) files = forms.FileField(required=False, validators=[validate_filesize, validate_mm_filetype]) }}} View: {{{ class EditPost(UpdateView): model = Post form_class = PostForm template_name = ""posts/new_edit_post.html"" @transaction.atomic def form_valid(self, form): response = super(EditPost, self).form_valid(form) for f in self.request.FILES.getlist('files')[:settings.MAX_UPLOAD_COUNT - self.object.files.all().count()]: UploadedFile.objects.create(content_object=self.object, file=f) self.object.modified = timezone.now() self.object.save() return response }}} The edit view works fine in Django 1.6, but after upgrading to 1.6.1 I get the following stacktrace: {{{ Traceback (most recent call last): File ""/home/twosb/lib/python2.7/site-packages/django/core/handlers/base.py"", line 114, in get_response response = wrapped_callback(request, *callback_args, **callback_kwargs) File ""/home/twosb/lib/python2.7/site-packages/django/views/generic/base.py"", line 69, in view return self.dispatch(request, *args, **kwargs) File ""/home/twosb/lib/python2.7/site-packages/django/utils/decorators.py"", line 29, in _wrapper return bound_func(*args, **kwargs) File ""/home/twosb/lib/python2.7/site-packages/django/contrib/auth/decorators.py"", line 22, in _wrapped_view return view_func(request, *args, **kwargs) File ""/home/twosb/lib/python2.7/site-packages/django/utils/decorators.py"", line 25, in bound_func return func(self, *args2, **kwargs2) File ""/home/twosb/app/twosb/posts/views.py"", line 141, in dispatch response = super(EditPost, self).dispatch(request, *args, **kwargs) File ""/home/twosb/lib/python2.7/site-packages/django/views/generic/base.py"", line 87, in dispatch return handler(request, *args, **kwargs) File ""/home/twosb/lib/python2.7/site-packages/django/views/generic/edit.py"", line 228, in post return super(BaseUpdateView, self).post(request, *args, **kwargs) File ""/home/twosb/lib/python2.7/site-packages/django/views/generic/edit.py"", line 171, in post return self.form_valid(form) File ""/home/twosb/lib/python2.7/site-packages/django/db/transaction.py"", line 339, in inner return func(*args, **kwargs) File ""/home/twosb/app/twosb/posts/views.py"", line 148, in form_valid response = super(EditPost, self).form_valid(form) File ""/home/twosb/lib/python2.7/site-packages/django/views/generic/edit.py"", line 147, in form_valid self.object = form.save() File ""/home/twosb/lib/python2.7/site-packages/django/forms/models.py"", line 446, in save construct=False) File ""/home/twosb/lib/python2.7/site-packages/django/forms/models.py"", line 100, in save_instance save_m2m() File ""/home/twosb/lib/python2.7/site-packages/django/forms/models.py"", line 96, in save_m2m f.save_form_data(instance, cleaned_data[f.name]) File ""/home/twosb/lib/python2.7/site-packages/django/db/models/fields/__init__.py"", line 516, in save_form_data setattr(instance, self.name, data) File ""/home/twosb/lib/python2.7/site-packages/django/contrib/contenttypes/generic.py"", line 292, in __set__ for obj in value: TypeError: 'NoneType' object is not iterable }}} ",Bug,closed,contrib.contenttypes,1.6,Release blocker,wontfix,form modelform,,Accepted,0,0,0,0,0,0