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没有支持的指数?
原标题:Indexing not supported?

我收到这一错误信息:

TypeError: City object does not support indexing

我的榜样是:

class City(db.Model):
  region = db.ReferenceProperty()
  name = db.StringProperty()
  image = db.BlobProperty()
  vieworder = db.IntegerProperty()
  areacode = db.IntegerProperty()

这是我的问询。

items = Item.all().filter( modified > , timeline).filter( published = ,                 True).order( -modified ).filter( cities = ,city[0].key()).fetch(PAGESIZE + 1)`

您能告诉我,我应如何提出疑问或模仿我的类别定义? 我使用<代码>listproperty(db.Key),以示范与参考资料的关系,我认为我可以像上述询问一样,因为它为一个项目工作。 我应该做些什么?

最佳回答
city[0].key()

这是你错误的原因。 您认为city是一个清单,但实际上是一个单一项目,或一些这样的项目。

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