Maybe a bit of pared down code will help get a response for this
problem:
from google.appengine.ext import db
class exModel(db.Model):
state = db.ReferenceProperty()
name = db.StringProperty()
@classmethod
def forEncode(self):
baseDct = {"name":self.name}
if self.state: baseDct["state"] = self.state.forEncode()
return baseDct
class exStateModel(db.Model):
desc = db.StringProperty()
@classmethod
def forEncode(self):
return {"desc":self.description }
The line [ baseDct["state"]:self.state.forEncode() ] found in the
forEncode method of exModel coughs up this:
AttributeError: 'ReferenceProperty' object has no attribute
'forEncode'
i get a similar error asking for any attribute. i just can't get at
the instance or anything about like the documentation demonstrates.
And i know its there, i confirmed it using the data viewer and the
reference and referenced instance are there... help me before i blow a
gasket...
Thanks, Rein
On Mar 31, 11:29 pm, Rein Petersen <[email protected]> wrote:
> Hi,
>
> i have a model with a referenceproperty that points to another
> instance of a model. i know the entity is stored because i can see the
> reference property and the referenced entity in the dataviewer.
>
> But, when i try to access the referenced instance or anything about
> the referenced instance (as i understand from the online docs), i just
> get the following error:
>
> AttributeError: 'ReferenceProperty' object has no attribute ...
>
> How can i instance a model entity with a ReferenceProperty object?
> This should be trivial i think but the docs say that just by accessing
> an attribute should trigger the fetch. i dont see that happening when
> i execute :
>
> modelAinstance.modelBref.myattribute
>
> where modelAinstance is an instance of ModelA which contains the
> attribute ModelBref which is a ReferenceProperty holding a reference
> to an instance of ModelB
>
> What am i missing?
>
> Thanks for the help...
>
> Rein
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