boto dynamodb2:我可以仅使用范围键查询表吗?

In one of my python application, I am using boto and I want to query a dynamodb table using range key only. I don't want to use scan.

评级表架构

ratings = Table.create('ratings', schema=[
    HashKey('user_id', data_type=NUMBER),
    RangeKey('photo_id', data_type=NUMBER)
], throughput={
    'read': 5,
    'write': 15,
}, indexes = [
    AllIndex('rating_allindex', parts=[
        HashKey('user_id', data_type=NUMBER),
        RangeKey('photo_id', data_type=NUMBER)
    ])
])


from boto.dynamodb2.table import Table
ratings = Table('ratings')
# photo_id is range_key and user_id is hash_key
ratings_list = ratings.query(photo_id__eq=1)

这样做时，我收到此错误 Query condition missing key schema element user_id.同样，我想我可以给我的 hash_key 一个过滤条件

ratings_list = ratings.query(user_id__gte=1, photo_id__eq=1)