user updates using Mongoose mongodb push not working - node.js

Question

I am trying to use MongoDB Mongoose MongoDB push to update an entity such that the dcrLocations array gets the dcrlocation entity pushed into it
This is my response from the MongoDB server
{
acknowledged: true,
modifiedCount: 0,
upsertedId: null,
upsertedCount: 0,
matchedCount: 0
}
Heres my model code
import mongoose from "mongoose";
//User Schema
const UserSchema = new mongoose.Schema({
firstName: {
type: String,
required: true,
},
lastName: {
type: String,
required: true,
},
username: {
type: String,
},
email: {
type: String,
required: true,
lowercase: true,
trim: true,
unique: true,
index: true,
},
password: {
type: String,
required: true,
trim: true,
},
hasSubscription: {
type: Boolean,
default: false
},
dcrLocations: [
{
dcrLocationId: {
type: mongoose.Schema.Types.ObjectId,
ref: 'DCRLocation'
}
},
]
},
{
toJSON: {
transform(doc, ret) {
delete ret.password,
delete ret.__v,
delete ret.createdAt,
delete ret.updatedAt
}
}
,
timestamps: true,
}
)
;
UserSchema.index({email: 1, phone: 1})
export default mongoose.model("User", UserSchema);
Heres my controller code
import {User} from "../../path/to/model.js";
import {ObjectID as ObjectId} from "mongodb";
function functionName() {
return {
AssDCRLoToUsr: async (req, res) => {
try {
const {dcrLocationId} = req.body;
console.log(dcrLocationId)
const userToUpdate = await User.updateOne(
{_id: req.params.id},
{
$push: {
dcrLocations: {
dcrLocationId: new ObjectId(dcrLocationId)
}
}
}
);
console.log(userToUpdate)
res.json(userToUpdate)
} catch (error) {
console.error(error)
res.json(false)
}
},
}
}
export {functionName};
Any advice on how I can make this work? I have been battling with it for some time now

Answer 1

try this
$addToSet is used to add unique element in array
import {User} from "../../path/to/model.js";
import {ObjectID as ObjectId} from "mongodb";
function functionName() {
return {
AssDCRLoToUsr: async (req, res) => {
try {
const {dcrLocationId} = req.body;
console.log(dcrLocationId)
const userToUpdate = await User.updateOne(
{_id: req.params.id},
{
$addToSet: {
dcrLocations: {
dcrLocationId: new ObjectId(dcrLocationId)
}
}
}
);
console.log(userToUpdate)
res.json(userToUpdate)
} catch (error) {
console.error(error)
res.json(false)
}
},
}
}
export {functionName};