Hi,
I think you are trying to filter the ReferenceProperty as a string,
this won't work. You need to;
query.filter('owner = ', PetOwner.all().filter('name =', 'johndoe'))
Doc on the Datastore ReferenceProperty;
http://code.google.com/appengine/docs/python/datastore/entitiesandmodels.html#References
Thanks,
Arun Shanker Prasad.
On Sep 15, 8:54 am, PatHaugen <[email protected]> wrote:
> Jumping into GAE, I found the ReferenceProperty interesting but still
> don't fully understand it.
>
> My question can expand on the example
> from:http://code.google.com/appengine/docs/python/datastore/creatinggettin...
>
> class PetOwner(db.Model):
> name = db.StringProperty()
> class Pet(db.Model):
> name = db.StringProperty()
> type = db.StringProperty() # cat, dog, etc.
> owner = db.ReferenceProperty(PetOwner)
>
> Let's do a query to select all cats with a specific owner.
>
> query = db.Query(Pet)
> query = Pet.all()
> query.filter('type = ', 'Cat')
> results = query.fetch(limit=10)
> for result in results:
> output = result.name
> return output
>
> What can I add to this to filter only those where 'owner' is
> 'johndoe'?
>
> I tried:
> query.filter('owner = ', 'johndoe')
>
> However it fails to return me a result, and I know you can pull the
> owner name via 'pet.owner.name' however trying:
> query.filter('owner.name = ', 'johndoe')
>
> Also fails, though it made sense for what should work. Does anyone
> know the proper method?
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