Mongoose Schema [Object] issue

Question

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

模型1:getAllUsers

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 );

模型2:getAllUsersRoles

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

在数据库中工作聚合查询：

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" : "[e-mail]",
"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
}

Nodejs代码：

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;

控制台输出错误：

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

Answer 1

尽我所能从您的代码中理解：

这是User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);

这是Role型号：

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);

Aggregation方法：

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

请对数据库的完整数据进行此操作。

还可以考虑使用mongoose.populate来检索用户角色的结果：https://mongoosejs.com/docs/populate.html