Question

I have a model and form like so:

class Image(BaseModel):
  original = db.BlobProperty()

class ImageForm(ModelForm):
  class Meta:
    model = Image

I do the following in my view:

form = ImageForm(request.POST, request.FILES, instance=image)
if form.is_valid():

And I get:

AttributeError at /image/add/

‘NoneType’ object has no attribute
‘validate’

Traced to:

/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/ext/db/djangoforms.py
in property_clean

605. value: The value to validate.
     606.
606. Raises:
607. forms.ValidationError if the value cannot be validated.
608. “””
609. if value is not None:

610. try:

611. prop.validate(prop.make_value_from_form(value))
     …

612. except (db.BadValueError, ValueError), e:

613. raise forms.ValidationError(unicode(e))
     615.
     616.
614. class ModelFormOptions(object):
615. “””A simple class to hold internal options for a ModelForm
     class.

▼ Local vars

prop None

value InMemoryUploadedFile: Nearby.jpg (image/jpeg)

Any ideas how to get it to validate? It looks like FileField does not have a validate method, which Django expects…

Answer 1

It doesn’t work with default django version. And bug is reported.

BTW, default installation raise other exeption. So possible problem with other part of your code.