如何使用node.js仅获取嵌套JSON对象MongoDB的数据

我的MONGODB中有一个JSON对象

{
"_id" : ObjectId("59d4b9848621854d8fb2b1e1"),
"Bot_name" : "Scheduling bot",
"Modules" : [ 
    {
        "ModuleID" : "1111",
        "ModuleStatement" : "This is a Sceduling bot, Would you like to book a flight?",
        "_id" : ObjectId("59d4b9968621854d8fb2b1e3"),
        "ModuleResponse" : [ 
            {
                "Response" : "yes",
                "TransBotID" : "1112"
            }, 
            {
                "Response" : "no",
                "TransBotID" : "1113"
            }
        ]
    }, 
    {
        "ModuleID" : "1112",
        "ModuleStatement" : "Where would you like to go? New York ? LA?",
        "_id" : ObjectId("59d4b9968621854d8fb2b1e3"),
        "ModuleResponse" : [ 
            {
                "Response" : "New York",
                "TransBotID" : "1121"
            }, 
            {
                "Response" : "LA",
                "TransBotID" : "1122"
            }
        ]
    }, 
    {
        "ModuleID" : "1121",
        "ModuleStatement" : " New York..",
        "_id" : ObjectId("59d4b9968621854d8fb2b1e3"),
        "ModuleResponse" : []
    }, 
     {
        "ModuleID" : "1121",
        "ModuleStatement" : " New York..",
        "_id" : ObjectId("59d4b9968621854d8fb2b1e3"),
        "ModuleResponse" : []
      }
   }

我在做一个查询，首先检查Bot_名称，然后检查包含JSON对象的嵌套数组模块中的ModuleID，这些模块是11111121121。。等等 如何仅获取

Bot的
ModuleID:1111
的json对象(名称：Scheduling Bot

到目前为止，我的问题是

botSchema.findOne({ Bot_name: req.body.Name ,'Modules.ModuleID':req.body.MID}, function (err, data) {
console.log(data)
   }

在这里，查询返回

模块中的所有json

如何仅获取一个所需的json对象？像这样

{
    "ModuleID" : "1111",
    "ModuleStatement" : "This is a Sceduling bot, Would you like to book a flight?",
    "_id" : ObjectId("59d4b9968621854d8fb2b1e3"),
    "ModuleResponse" : [ 
        {
            "Response" : "yes",
            "TransBotID" : "1112"
        }, 
        {
            "Response" : "no",
            "TransBotID" : "1113"
        }
    ]
}

过滤器子阵列需要使用
$elemMatch

db.botSchema.findOne( 
    { Bot_name: "Scheduling bot"} 
    , { 'Modules': { $elemMatch:{'ModuleID':"1111"} } }
    , function (err, data) { console.log(data) })

结果:

{
    "_id" : ObjectId("59d4b9848621854d8fb2b1e1"),
    "Modules" : [ 
        {
            "ModuleID" : "1111",
            "ModuleStatement" : "This is a Sceduling bot, Would you like to book a flight?",
            "_id" : ObjectId("59d4b9968621854d8fb2b1e3"),
            "ModuleResponse" : [ 
                {
                    "Response" : "yes",
                    "TransBotID" : "1112"
                }, 
                {
                    "Response" : "no",
                    "TransBotID" : "1113"
                }
            ]
        }
    ]
}

您的查询（
'Modules.ModuleID:req.body.MID
）应该可以工作并过滤
模块
数组。所以从技术上讲，
data.Modules[0]
应该是您想要的。不起作用。如果我用于循环，它将返回json objectit可以工作的所有模块，但是查询和获取所需的确切json会更容易。这是可能的还是我们只能将所有对象作为我的模式？