how to retrieve data from 3 mongoose sachems in custom order - node.js

Question

I'm using node, express, mongoose for my back-end. I created User schema as follows,
const mongoose = require('mongoose');
const addressSchema = mongoose.Schema({
_id: mongoose.Schema.Types.ObjectId,
no: { type: String },
firstStreet: { type: String },
secondStreet: { type: String },
city: { type: String, required: true },
district: { type: String }
})
const contactDetailsSchema = mongoose.Schema({
_id: mongoose.Schema.Types.ObjectId,
landNumber: { type: String },
mobileNumber: { type: String },
momNumber: { type: String },
dadNumber: { type: String },
gardianNumber: { type: String }
})
const userSchema = mongoose.Schema({
_id: mongoose.Schema.Types.ObjectId,
email: {
type: String,
required: true,
unique:true,
lowercase: true,
match: /[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*#(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?/
},
password: { type: String, required: true },
role: { type: String, required: true },
fullName: { type: String, required: true },
batch: { type: Number, required: true },
subject: [{
type: String
}],
school: { type: String, required: true },
birthday: { type: String },
address: { type: mongoose.Schema.Types.ObjectId, ref:'User' },
contactDetails: { type: mongoose.Schema.Types.ObjectId, ref:'User' },
stream: { type: String },
});
module.exports = {
user: mongoose.model('User', userSchema),
address: mongoose.model('Address', addressSchema),
contactDetails: mongoose.model('ContactDetails', contactDetailsSchema)
};
and I created a GET route to retrieve data from all users. I store these data in three separate mongoDB collections with same _id. And I want to get those all User data.
my User GET route is like this,
const userModels = require('../models/user');
const User = userModels.user;
const Address = userModels.address;
const ContactDetails = userModels.contactDetails;
router.get('/', (req, res) =>{
User
.find()
.exec()
.then(docs => {
console.log(docs);
const responce1 = {
count: docs.length,
Users: docs.map(doc => {
return {
Message: 'User Details',
Id: doc._id,
Email: doc.email,
Role: doc.role,
Full_Name: doc.fullName,
Batch: doc.batch,
Subject: doc.subject,
School: doc.school,
Birthday: doc.birthday,
Stream: doc.stream,
request: {
type: 'get',
url: 'http://localhost:3000/user/' +doc._id
}
}
})
}
Address
.find()
.exec()
.then(docs => {
console.log(docs)
responce2 = {
count: docs.length,
Address: docs.map(doc => {
return {
Message: 'Address',
_id: doc._id,
Address: doc.city,
First_Street: doc.firstStreet,
Second_Street: doc.secondStreet,
city: doc.city,
District: doc.district,
}
})
}
})
.catch(err => {
console.log(err);
res.status(500).json({
error: err
});
});
ContactDetails
.find()
.exec()
.then(docs => {
console.log(docs)
responce3 = {
count: docs.length,
ContactDetails: docs.map(doc => {
return {
Message: 'Contact Details',
_id: doc._id,
Land_Number: doc.landNumber,
Mobile_Number: doc.mobileNumber,
Mom_Number: doc.momNumber,
Dad_Number: doc.dadNumber,
Gardian_Number: doc.gardianNumber,
}
})
}
res.status(200).json([responce1,responce2,responce3]);
})
.catch(err => {
console.log(err);
res.status(500).json({
error: err
});
});
})
.catch(err => {
console.log(err);
res.status(500).json({
error: err
});
});
});
I get data like this,
[
{
"count": 3,
"Users": [
{
"Message": "User Details",
"Id": "5b8e68fb9c898543b4970628",
"Email": "new2#gmail.com",
"Role": "student",
"Full_Name": "Dinusha",
"Batch": 16,
"Subject": [
"ICT"
],
"School": "School",
"Birthday": "1996/10/23",
"Stream": "English",
"request": {
"type": "get",
"url": "http://localhost:3000/user/5b8e68fb9c898543b4970628"
}
},
{
"Message": "User Details",
"Id": "5b8e68fd9c898543b4970629",
"Email": "new3#gmail.com",
"Role": "student",
"Full_Name": "Dinusha",
"Batch": 16,
"Subject": [
"ICT"
],
"School": "School",
"Birthday": "1996/10/23",
"Stream": "English",
"request": {
"type": "get",
"url": "http://localhost:3000/user/5b8e68fd9c898543b4970629"
}
},
{
"Message": "User Details",
"Id": "5b8f52e707c299266c0a6b97",
"Email": "new4#gmail.com",
"Role": "student",
"Full_Name": "Dinusha",
"Batch": 16,
"Subject": [
"ICT"
],
"School": "School",
"Birthday": "1996/10/23",
"Stream": "English",
"request": {
"type": "get",
"url": "http://localhost:3000/user/5b8f52e707c299266c0a6b97"
}
}
]
},
{
"count": 3,
"Address": [
{
"Message": "Address",
"_id": "5b8e68fb9c898543b4970628",
"Address": "city",
"city": "city",
"District": "rathnapura"
},
{
"Message": "Address",
"_id": "5b8e68fd9c898543b4970629",
"Address": "city",
"city": "city",
"District": "rathnapura"
},
{
"Message": "Address",
"_id": "5b8f52e707c299266c0a6b97",
"Address": "city",
"city": "city",
"District": "rathnapura"
}
]
},
{
"count": 3,
"ContactDetails": [
{
"Message": "Contact Details",
"_id": "5b8e68fb9c898543b4970628",
"Land_Number": "072846",
"Mobile_Number": "7368438",
"Mom_Number": "7364738",
"Dad_Number": "648364"
},
{
"Message": "Contact Details",
"_id": "5b8e68fd9c898543b4970629",
"Land_Number": "072846",
"Mobile_Number": "7368438",
"Mom_Number": "7364738",
"Dad_Number": "648364"
},
{
"Message": "Contact Details",
"_id": "5b8f52e707c299266c0a6b97",
"Land_Number": "072846",
"Mobile_Number": "7368438",
"Mom_Number": "7364738",
"Dad_Number": "648364"
}
]
}
]
but I need to get data of every User like in this form
[
"Users":
{
"Message": "User Details",
"Id": "5b8e68fb9c898543b4970628",
"Email": "new2#gmail.com",
"Role": "student",
"Full_Name": "Dinusha",
"Batch": 16,
"Subject": [
"ICT"
],
"School": "School",
"Birthday": "1996/10/23",
"Stream": "English",
"request": {
"type": "get",
"url": "http://localhost:3000/user/5b8e68fb9c898543b4970628"
}
},
"Address":
{
"Message": "Address",
"_id": "5b8e68fb9c898543b4970628",
"Address": "city",
"city": "city",
"District": "rathnapura"
},
"ContactDetails":
{
"Message": "Contact Details",
"_id": "5b8e68fb9c898543b4970628",
"Land_Number": "072846",
"Mobile_Number": "7368438",
"Mom_Number": "7364738",
"Dad_Number": "648364"
},
]
can I get those data like that.
how to get data from mongodb as that custom form.

Answer 1

Use aggregate method and $lookup
https://mongoosejs.com/docs/api.html#aggregate_Aggregate-lookup