Pymongo 忽略 allowDiskUse = True

Question

我查看了此问题的其他答案，但仍然无法正常工作。我正在尝试删除重复的案例，这里是功能：

def deleteDups(datab):
    col = db[datab]
    pipeline = [
    {'$group': {
        '_id': {
            'CASE NUMBER': '$CASE NUMBER',
            'JURISDICTION': '$JURISDICTION'},#needs to be case insensitive
            'count': {'$sum': 1},
            'ids': {'$push': '$_id'}
            }
        },
    {'$match': {'count': {'$gt': 1}}},
    ]
    results = col.aggregate(pipeline, allowDiskUse = True)
    count = 0
    for result in results:
        doc_count = 0
        print(result)
        it = iter(result['ids'])
        next(it)
        for id in it:
            deleted = col.delete_one({'_id': id})
            count += 1
            doc_count += 1
            #print("API call recieved:", deleted.acknowledged) debug, is the database recieving requests
            
    print("Total documents deleted:", count)

然而，每次，我都会得到这个回溯：

  File "C:\Users\*****\Documents\GitHub\*****\controller.py", line 202, in deleteDups
    results = col.aggregate(pipeline, allowDiskUse = True)
  File "C:\Python38\lib\site-packages\pymongo\collection.py", line 2375, in aggregate
    return self._aggregate(_CollectionAggregationCommand,
  File "C:\Python38\lib\site-packages\pymongo\collection.py", line 2297, in _aggregate
    return self.__database.client._retryable_read(
  File "C:\Python38\lib\site-packages\pymongo\mongo_client.py", line 1464, in _retryable_read
    return func(session, server, sock_info, slave_ok)
  File "C:\Python38\lib\site-packages\pymongo\aggregation.py", line 136, in get_cursor
    result = sock_info.command(
  File "C:\Python38\lib\site-packages\pymongo\pool.py", line 603, in command
    return command(self.sock, dbname, spec, slave_ok,
  File "C:\Python38\lib\site-packages\pymongo\network.py", line 165, in command
    helpers._check_command_response(
  File "C:\Python38\lib\site-packages\pymongo\helpers.py", line 159, in _check_command_response
    raise OperationFailure(msg % errmsg, code, response)
pymongo.errors.OperationFailure: Exceeded memory limit for $group, but didn't allow external sort. Pass allowDiskUse:true to opt in.

我标出了一些保护隐私的路径。但是这条线让我非常抓狂：results = col.aggregate(pipeline, allowDiskUse = True) 非常明确地通过了 allowDiskUse = True，而 Mongo 只是忽略了它。如果我拼错了什么，我就瞎了。 True 必须大写才能在 python 中传递布尔值。

我觉得我在这里要疯了。

Answer 1

根据documentation：

Atlas 免费层和共享集群不支持聚合命令或其辅助方法的 allowDiskUse 选项。

（感谢Shane Harvey提供此信息）