Hi,
This looks to be issue 280:
http://code.google.com/p/googleappengine/issues/detail?id=280
-Marzia
On Fri, Nov 14, 2008 at 11:44 AM, pran__ <[EMAIL PROTECTED]> wrote:
>
> I was trying with a visitor fedback form and i got a TypeError in the
> admin console, while trying to view an entity. This is not the full
> story. Initially my 'Visitor' class did not had any required fields.
> And there was some data in the Visitor Entity Kind. Later, i added the
> required=True, and put() some values. Now, when trying to view
> entities which i put() later, created this error.
> I deleted all the data corresponding to Visitor, and then again i put
> () some of them. Now it is working fine. There seems to be some kind
> of unhandled issue.
> Please advise.
>
> The traceback is as follows
>
> ##
> Traceback (most recent call last):
> File "/home/pranav/google_appengine/google/appengine/ext/webapp/
> __init__.py", line 499, in __call__
> handler.get(*groups)
> File "/home/pranav/google_appengine/google/appengine/ext/admin/
> __init__.py", line 672, in get
> field = data_type.input_field(name, value, sample_values)
> File "/home/pranav/google_appengine/google/appengine/ext/admin/
> __init__.py", line 774, in input_field
> if len(sample_value) > 255 or sample_value.find('\n') >= 0:
> TypeError: object of type 'NoneType' has no len()
> ##
>
> My Model is as follows
>
> class Visitor(db.Model):
> "This is only for visitors who want to comment"
> name = db.StringProperty(required=True)
> email = db.EmailProperty(required=True)
> comment = db.TextProperty(required=True)
> notifications = db.BooleanProperty()
> date = db.DateTimeProperty(auto_now_add=True)
>
> class VisitorForm(djangoforms.ModelForm):
> class Meta:
> model = Visitor
>
> And the entity is just saved had following information:
>
> Key :: Some Value
> Id :: Some Value
> Key Name ::
> comment :: Hmmm..
> email :: [EMAIL PROTECTED]
> name :: Larry Page
> notifications :: False
> >
>
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