我们可以找到数据并从结果中修改oprater名称

Question

数据：

 {
    "_id" : ObjectId("5874a303414af4d70e3c988d"),
    "trade" : "XYZ",
    "sub_trade" : [ 
        "ABC1", 
        "ABC2", 
        "ABC3", 
        "ABC14", 
        "ABC15"
    ]
  }

我们应该将sub_trade的索引动态地改为交易值

接受输出：

{
    "_id" : ObjectId("5874a303414af4d70e3c988d"),
    "trade" : "XYZ",
    "XYZ" : [ 
        "ABC1", 
        "ABC2", 
        "ABC3", 
        "ABC14", 
        "ABC15"
    ]
  }

请帮帮我

Answer 1

你不想要这样的东西：

data['sub_trade'] = data['trade'];
delete data['trade'];

编辑：如果要在查询时更改使用Mongos投影

{
    "$project": {
        "sub_trade": "trade"
    }
}

https://docs.mongodb.com/manual/reference/operator/aggregation/project/