HI
This won't be the datastore, at this point your not even trying to
access it.
Notice the reference to choice_set in the stacktrace.
What you will find is that the BaseModel and django is possibly doing
some metaclass work
and/or the google code is (it generates accessors) is clashing.
As an example if you have a reference_property pointing to a target
class, the target class
will get the an method automatically created for it called
<source_class>_set
You should rename the class Choice or the method choice and see which
causes the error to go away
(or burrow down into the code ;-)
See ya
T
On Apr 13, 4:52 pm, Ferry Tanu <ferry...@gmail.com> wrote:
> Hi,
>
> I'm trying to follow the google-app-engine-django sample, these are steps
> that I did:
>
> 1. models.py:
>
> from appengine_django.models import BaseModel
> from google.appengine.ext import db
>
> class Poll(BaseModel):
> question = db.StringProperty()
> pub_date = db.DateTimeProperty('date published')
>
> class Choice(BaseModel):
> poll = db.ReferenceProperty(Poll)
> choice = db.StringProperty()
> votes = db.IntegerProperty()
>
> 2. python manage.py shell
> 3. >>> from mysite.polls.models import Poll, Choice
>
> Then got this error:
>
> WARNING:root:Could not initialize images API; you are likely missing the
> Python
> "PIL" module. ImportError: No module named _imaging
> Python 2.5.4 (r254
> <http://code.google.com/p/google-app-engine-django/source/detail?r=254>:67916,
> Dec 23 2008, 15:10:54) [MSC v.1310 32 bit
> (Intel)] on
> win32
> Type "help", "copyright", "credits" or "license" for more information.
> (InteractiveConsole)>>> from mysite.polls.models import Poll, Choice
>
> Traceback (most recent call last):
> File "<console>", line 1, in <module>
> File "D:\mysite\polls\models.py", line 9, in <module>
> class Choice(BaseModel):
> File "D:\mysite\appengine_django\models.py", line 131, in __init__
> super(PropertiedClassWithDjango, cls).__init__(name, bases, attrs)
> File "C:\Program
> Files\Google\google_appengine\google\appengine\ext\db\__init_
> _.py", line 319, in __init__
> _initialize_properties(cls, name, bases, dct)
> File "C:\Program
> Files\Google\google_appengine\google\appengine\ext\db\__init_
> _.py", line 270, in _initialize_properties
> attr.__property_config__(model_class, attr_name)
> File "C:\Program
> Files\Google\google_appengine\google\appengine\ext\db\__init_
> _.py", line 2546, in __property_config__
> self.collection_name))
> DuplicatePropertyError: Class Model already has property choice_set
>
> Anyone know why ?
>
> Thanks
>
> ~Ferry
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