Javascript Mongoose模式[对象]问题

我正在使用通过mongoose连接到mongoDB的NodeJ。 需要在Nodejs（Mongoose）中应用以下工作聚合逻辑。聚合在DB端正常工作，但我得到[Object]错误

Model1:getAllUsers

var mongoose = require('mongoose');
const getAllUsersRolesDataSchema = new mongoose.Schema({   
    userRefID:String ,
    skillRefId: String,
    queueName:String,

})
module.exports = getAllUsersRoles = mongoose.model('getAllUsersRoles',getAllUsersRolesDataSchema);

在这里，我不确定我的模型创建是否正确

  var mongoose = require('mongoose');
    const getAllUsersDataSchema = new mongoose.Schema({
        
        userRefID:String ,
        userName:String,
        divisionId: String,
        divisionName:String,
        emailId :String,
//This role definition i created only for aggregation to work
        role:[{        
            userRefID:String,
            skillRefId:String,
            queueName:String,
           
        }]
    })
    module.exports = getAllUsers = mongoose.model('getAllUsers',getAllUsersDataSchema );

Model2:getAllUsersRoles

var mongoose = require('mongoose');
const getAllUsersRolesDataSchema = new mongoose.Schema({   
    userRefID:String ,
    skillRefId: String,
    queueName:String,

})
module.exports = getAllUsersRoles = mongoose.model('getAllUsersRoles',getAllUsersRolesDataSchema);

数据库中的工作聚合查询：

     db.getallusers.aggregate([
...   {
...     "$lookup": {
...       "from": "getallusersroles",
...       "localField": "userRefID",
...       "foreignField": "userRefID",
...       "as": "role"
...     }
...   }
... ]).pretty()
{
        "_id" : ObjectId("5ff2b73d2af2b806685735a4"),
        "userRefID" : "07f426ff-506f-4e5e-afdb-2c7397edac61",
        "userName" : "EPS Purecloud Support",
        "divisionId" : "36852a81-ad7f-4c71-a1cd-7f431c05179f",
        "divisionName" : "",
        "emailId" : "eps@genesys.com",
        "role" : [
                {
                        "_id" : ObjectId("5ff2b73c2af2b8066857355f"),
                        "userRefID" : "07f426ff-506f-4e5e-afdb-2c7397edac61",
                        "skillRefId" : "c02dbb03-ed78-442a-a9cd-0f16c823646b",
                        "queueName" : "CIM_test",
                        "__v" : 0
                },
                {
                        "_id" : ObjectId("5ff2b73c2af2b80668573560"),
                        "userRefID" : "07f426ff-506f-4e5e-afdb-2c7397edac61",
                        "skillRefId" : "a626d99e-f5e9-47ab-a5d0-d493003c737f",
                        "queueName" : "CLAIMS",
                        "__v" : 0
                },       
               
        ],
        "__v" : 0
}

const express = require('express');
const router = express.Router();
const request = require('request');
const config = require('../config');
const fs = require('fs'); 
const getAllUsers = require ('../db/getAllUsersListmodel');
const getAllUsersRoles = require ('../db/getetUserRolesListModel');
var mongoose = require('mongoose');
mongoose.connect ('mongodb://localhost/testdb',{ useUnifiedTopology: true , useNewUrlParser: true });

router.get('/', (req, res) => {
   getAllUsers.aggregate([
      {
        "$lookup": {
          "from": "getallusersroles",
          "localField": "userRefID",
          "foreignField": "userRefID",
          "as": "role"
        }
      },
    
    ],(err,res)=>{
      console.log(res);
     
  })

});
  module.exports = router;

 [
      {
        _id: 5ff2b73d2af2b806685735a4,
        userRefID: '07f426ff-506f-4e5e-afdb-2c7397edac61',
        userName: 'EPS Purecloud Support',
        divisionId: '36852a81-ad7f-4c71-a1cd-7f431c05179f',
        divisionName: '',
        emailId: 'eps@genesys.com',
        role: [ [Object], [Object] ],
        __v: 0
      },
    ]

节点代码：

     db.getallusers.aggregate([
...   {
...     "$lookup": {
...       "from": "getallusersroles",
...       "localField": "userRefID",
...       "foreignField": "userRefID",
...       "as": "role"
...     }
...   }
... ]).pretty()
{
        "_id" : ObjectId("5ff2b73d2af2b806685735a4"),
        "userRefID" : "07f426ff-506f-4e5e-afdb-2c7397edac61",
        "userName" : "EPS Purecloud Support",
        "divisionId" : "36852a81-ad7f-4c71-a1cd-7f431c05179f",
        "divisionName" : "",
        "emailId" : "eps@genesys.com",
        "role" : [
                {
                        "_id" : ObjectId("5ff2b73c2af2b8066857355f"),
                        "userRefID" : "07f426ff-506f-4e5e-afdb-2c7397edac61",
                        "skillRefId" : "c02dbb03-ed78-442a-a9cd-0f16c823646b",
                        "queueName" : "CIM_test",
                        "__v" : 0
                },
                {
                        "_id" : ObjectId("5ff2b73c2af2b80668573560"),
                        "userRefID" : "07f426ff-506f-4e5e-afdb-2c7397edac61",
                        "skillRefId" : "a626d99e-f5e9-47ab-a5d0-d493003c737f",
                        "queueName" : "CLAIMS",
                        "__v" : 0
                },       
               
        ],
        "__v" : 0
}

const express = require('express');
const router = express.Router();
const request = require('request');
const config = require('../config');
const fs = require('fs'); 
const getAllUsers = require ('../db/getAllUsersListmodel');
const getAllUsersRoles = require ('../db/getetUserRolesListModel');
var mongoose = require('mongoose');
mongoose.connect ('mongodb://localhost/testdb',{ useUnifiedTopology: true , useNewUrlParser: true });

router.get('/', (req, res) => {
   getAllUsers.aggregate([
      {
        "$lookup": {
          "from": "getallusersroles",
          "localField": "userRefID",
          "foreignField": "userRefID",
          "as": "role"
        }
      },
    
    ],(err,res)=>{
      console.log(res);
     
  })

});
  module.exports = router;

 [
      {
        _id: 5ff2b73d2af2b806685735a4,
        userRefID: '07f426ff-506f-4e5e-afdb-2c7397edac61',
        userName: 'EPS Purecloud Support',
        divisionId: '36852a81-ad7f-4c71-a1cd-7f431c05179f',
        divisionName: '',
        emailId: 'eps@genesys.com',
        role: [ [Object], [Object] ],
        __v: 0
      },
    ]

控制台输出错误：

     db.getallusers.aggregate([
...   {
...     "$lookup": {
...       "from": "getallusersroles",
...       "localField": "userRefID",
...       "foreignField": "userRefID",
...       "as": "role"
...     }
...   }
... ]).pretty()
{
        "_id" : ObjectId("5ff2b73d2af2b806685735a4"),
        "userRefID" : "07f426ff-506f-4e5e-afdb-2c7397edac61",
        "userName" : "EPS Purecloud Support",
        "divisionId" : "36852a81-ad7f-4c71-a1cd-7f431c05179f",
        "divisionName" : "",
        "emailId" : "eps@genesys.com",
        "role" : [
                {
                        "_id" : ObjectId("5ff2b73c2af2b8066857355f"),
                        "userRefID" : "07f426ff-506f-4e5e-afdb-2c7397edac61",
                        "skillRefId" : "c02dbb03-ed78-442a-a9cd-0f16c823646b",
                        "queueName" : "CIM_test",
                        "__v" : 0
                },
                {
                        "_id" : ObjectId("5ff2b73c2af2b80668573560"),
                        "userRefID" : "07f426ff-506f-4e5e-afdb-2c7397edac61",
                        "skillRefId" : "a626d99e-f5e9-47ab-a5d0-d493003c737f",
                        "queueName" : "CLAIMS",
                        "__v" : 0
                },       
               
        ],
        "__v" : 0
}

const express = require('express');
const router = express.Router();
const request = require('request');
const config = require('../config');
const fs = require('fs'); 
const getAllUsers = require ('../db/getAllUsersListmodel');
const getAllUsersRoles = require ('../db/getetUserRolesListModel');
var mongoose = require('mongoose');
mongoose.connect ('mongodb://localhost/testdb',{ useUnifiedTopology: true , useNewUrlParser: true });

router.get('/', (req, res) => {
   getAllUsers.aggregate([
      {
        "$lookup": {
          "from": "getallusersroles",
          "localField": "userRefID",
          "foreignField": "userRefID",
          "as": "role"
        }
      },
    
    ],(err,res)=>{
      console.log(res);
     
  })

});
  module.exports = router;

 [
      {
        _id: 5ff2b73d2af2b806685735a4,
        userRefID: '07f426ff-506f-4e5e-afdb-2c7397edac61',
        userName: 'EPS Purecloud Support',
        divisionId: '36852a81-ad7f-4c71-a1cd-7f431c05179f',
        divisionName: '',
        emailId: 'eps@genesys.com',
        role: [ [Object], [Object] ],
        __v: 0
      },
    ]

---

我从您的代码中了解到：

这是

用户

型号：

const mongoose = require('mongoose');
const Schema = mongoose.Schema;

const UserSchema = new Schema({
    userName: {
        type: String,
    },
    divisionId: {
        type: Schema.Types.ObjectId,
    },
    divisionName: {
        type: String,
    },
    emailId: {
        type: Schema.Types.ObjectId,
    },
});

module.exports = getAllUsers = mongoose.model('User', UserSchema);

const mongoose = require('mongoose');
const Schema = mongoose.Schema

const RoleSchema = new Schema({   
    userRefID: {
        type: Schema.Types.ObjectId,
    },
    skillRefId: {
        type: Schema.Types.ObjectId,
    },
    queueName: {
        type: String,
    },
});

module.exports = getAllUsersRoles = mongoose.model('Role', RoleSchema);

这是

角色

模型：

const mongoose = require('mongoose');
const Schema = mongoose.Schema;

const UserSchema = new Schema({
    userName: {
        type: String,
    },
    divisionId: {
        type: Schema.Types.ObjectId,
    },
    divisionName: {
        type: String,
    },
    emailId: {
        type: Schema.Types.ObjectId,
    },
});

module.exports = getAllUsers = mongoose.model('User', UserSchema);

const mongoose = require('mongoose');
const Schema = mongoose.Schema

const RoleSchema = new Schema({   
    userRefID: {
        type: Schema.Types.ObjectId,
    },
    skillRefId: {
        type: Schema.Types.ObjectId,
    },
    queueName: {
        type: String,
    },
});

module.exports = getAllUsersRoles = mongoose.model('Role', RoleSchema);

聚合

方法的作用：

User.aggregate([
    {
      $lookup: {
        "from": "Role",
        "localField": "_id",
        "foreignField": "userRefID",
        "as": "roles"
      },
    },
]);

请使用数据库完整数据尝试此操作

---

也考虑使用<代码> MangoSo。填充检索用户角色的结果：

错误消息在哪里？作为旁注，您应该将Ref ID存储为

ObjectId

，

getAllUsersDataSchema

中的

role

字段是不必要的<使用

$lookup

的code>Aggregate方法不要求您的模型包含新的输出字段。您好。即使我删除了getAllUsersDataSchema中的角色字段，我也会得到与[Object]相同的输出。你能帮我一下吗。感谢您尝试检查这些

[Object]

s。使用当前代码，您应该：

console.log（res[0].role[0]）