dynamodb how to query by sort key only?

问题

I have written some python code, I want to query dynamoDB data by sort key. I remember I can use follow-up code successful:

 table.query(KeyConditionExpression=Key('event_status').eq(event_status))

My table structure column

primary key:event_id
sort key: event_status

回答1:

You have to create a global secondary index (GSI) for the sort key in order to query on it alone.

回答2:

The scan API should be used if you would like to get data from DynamoDB without using Hash Key attribute value.

Example:-

fe = Attr('event_status').eq("new");

response = table.scan(
        FilterExpression=fe        
    )

for i in response['Items']:

print(json.dumps(i, cls=DecimalEncoder))

while 'LastEvaluatedKey' in response:
    response = table.scan(        
        FilterExpression=fe,        
        ExclusiveStartKey=response['LastEvaluatedKey']
        )

    for i in response['Items']:
        print(json.dumps(i, cls=DecimalEncoder))

来源：https://stackoverflow.com/questions/42371411/dynamodb-how-to-query-by-sort-key-only