BadValueError: Property content is required
Les properties avec le flag "required" à True doivent être initialisées lors de l'instanciation (doc).
Exemple (post) :
class Blah(db.Model): a = db.TextProperty(required=True) def my_test(): m = Blah() # A validation exception is thrown here # It's a fairly common pattern to go m = Blah() m.a = 'df' m.put() # instead of having to do m = Blah(a='df')