This is broken both in SDK and Production.
I filed an issue (link below), but I'd like to know if I'm missing
something.
#Models
class A(db.Expando):
foo = db.StringProperty()
class B(db.Expando):
bar = db.ReferenceProperty(A)
#Saving works fine
...
a = A()
a.foo = "bar"
a.put()
b = B()
b.bar = a
b.put()
#BUT Referencing is broken
...
b = B.all().get()
self.response.out.write(b.bar.foo) #this does not work
self.response.out.write(b.bar.get().foo) #this does not work
#The error message for both is similar and looks like the one below:
Traceback (most recent call last):
File "C:\Program Files
(x86)\Google\google_appengine\google\appengine\ext\webapp\_webapp25.py", line
701, in __call__
handler.get(*groups)
File "C:\project\main.py", line 34, in get
self.response.out.write(b.bar.foo)
File "C:\Program Files
(x86)\Google\google_appengine\google\appengine\ext\db\__init__.py", line 1860,
in __getattribute__
return super(Expando, self).__getattribute__(key)
File "C:\Program Files
(x86)\Google\google_appengine\google\appengine\ext\db\__init__.py", line 3561,
in __get__
reference_id.to_path())
ReferencePropertyResolveError: ReferenceProperty failed to be resolved: [u'A',
u'266']
#Dev or Production?
BOTH.
This bug is also breaking the links in the B entities in the Admin Console
Datastore Viewer in production. Clicking on the referenced property links,
present an "entity not found" error.
#Insights
It seems that the resolver method is incorrectly treating the entity id as a
name, and passing it to the resolver as a string instead of an int or long. I
did some more tests with db.Key.from_path(), and the output key is different if
the second argument is a string and if it is an int or long. Perhaps this is
related to the bug above.
Can someone verify this? Am I missing something?
ISSUE LINK: http://code.google.com/p/googleappengine/issues/detail?id=7170
Thanks!
--
You received this message because you are subscribed to the Google Groups
"Google App Engine" group.
To view this discussion on the web visit
https://groups.google.com/d/msg/google-appengine/-/YmaoTVVxVScJ.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/google-appengine?hl=en.
