我无法检索Table_Service的query_entities属性

Question

我的查询应该返回超过1000行。但是，query_entities一次查询仅返回1000行。 因此，我想在结果查询超过1000行时使用重新生成的令牌，以获取查询应返回的所有行。但我无法检索x-ms-continuation属性。

#coding:utf-8
class Use_Azure_Data:

    def __init__(self, account_name, sas_token):
        self._account_name = account_name
        self._sas_token = sas_token

    #Auth
    def _set_table_service(self):
        table_service = TableService(account_name=self._account_name, sas_token=self._sas_token)
        return(table_service)


    def Retrives_datas(self, days_before):

        before_now = datetime.datetime.now() - datetime.timedelta(days=days_before)
        now = before_now.isoformat()
        filter = "Timestamp gt datetime'" + now + "'"
        Query = self.Table_Service.query_entities('MyTable', filter = filter, timeout=None)

        if hasattr(Query, 'x-ms-continuation'):
            print("x-ms-continuation attribut for Query EXIST.")
        else:
            print("x-ms-continuation attribut for Query NOT EXIST.


    Table_Service = property(_set_table_service)


Data = Use_Azure_Data('MyAccount', 'MySASkey' )
Data.Retrives_datas(7)

查询EXIST的x-ms-continuation属性。

我想检索x-ms-continutation以使用它来获取所有行，而我的查询将对此

Answer 1

如果您使用的是azure-cosmosdb-table的最新软件包，则应使用marker而不是x-ms-continuation。

示例代码如下：

table_service = TableService(account_name, account_key)
i=0
marker = None
while True:
    tasks = table_service.query_entities(table_name, data_filter,
                                         marker = marker,
                                         num_results=1000)
    for task in tasks:
      i += 1
      print(task)
    if tasks.next_marker is not None and len(tasks.next_marker) > 0:
      marker = tasks.next_marker
    else:
        break


print i

您可以查看query_entities on GitHub的定义：