Thanks Andy, it works now
On Apr 1, 12:29 pm, Andy Freeman <[email protected]> wrote:
> > @classmethod
> > def forEncode(self):
>
> Because of @classmethod, self isn't an instance, it's the class
> (probably either exModel or exStateModel). While the
> ReferenceProperty object itself is part of the class, the actual
> values are associated with instances.
>
> On Apr 1, 9:06 am, Rein Petersen <[email protected]> wrote:
>
> > 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- Hide quoted text -
>
> > - Show quoted text -
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