人们可以很容易地使用JDO语法上的多个参数查询,如下所示: //specify the persistent entity you're querying and you filter usign params
query = pm.newQuery(MyClass.class, " customer == paramCustomer && date >= paramStartDate && d
阅读:http://code.google.com/appengine/docs/python/datastore/gqlreference.html 我想用: := IN 但我不确定如何使其发挥作用。我们假设以下内容: class User(db.Model):
name = db.StringProperty()
class UniqueListOfSavedItems(db.M