How to pass an ObjectId into a POST request? - node.js

Question

I am trying to make a One-To-Many relationship between two tables(Group and Movement tables) using node js (Express) and mongo DB. I already have a group Id coming from the Group table on my side, my question is, how can I save a movement( see point 3 ) with that group Id I have. I tried passing groupId: req.body.group._id and
groupId: req.body.group but I am never able to populate that variable
This are the two entities I've created:
1) GROUP ENTITY
const mongoose = require("mongoose")
const GroupSchema = mongoose.Schema({
name: {
type: String,
required: true
},
limit: {
type: String,
required: true
},
date: {
type: Date,
default: Date.now
},
movement: [{ type: mongoose.Schema.Types.ObjectId, ref: 'Movement' }],
user: { type: mongoose.Schema.Types.ObjectId, ref: 'User' }
})
module.exports = mongoose.model("Group", GroupSchema)
2) MOVEMENT ENTITY
const mongoose = require("mongoose")
const MovementSchema = mongoose.Schema({
description: {
type: String,
required: true
},
value: {
type: String,
required: true
},
date: {
type: Date,
default: Date.now
},
group: { type: mongoose.Schema.Types.ObjectId, ref: 'Group' }
})
module.exports = mongoose.model("Movement", MovementSchema)
This is my movement router where I make the endpoints (Actual problem is here)
3) MovementRoute
const router = require('express').Router();
const verify = require('./verifyToken');
const User = require('../model/User');
const Group = require('../model/Group');
const Movement = require('../model/Movement');
// Create Movement
router.post('/', verify, async (req, res) => {
const post = new Movement({
description: req.body.description,
value: req.body.value,
groupId: req.body.group._id //**tried this**
});
try {
const savedMovement = await post.save()
res.status(200).send(res.json({ data: savedMovement }));
} catch (error) {
res.status(400).send(res.json({ message: error }));
}
});
module.exports = router;
Request sent
{
"description":"group1",
"value":"233",
"group":"5e506f3c56233d08f79bc8f3"
}

Answer 1

If console.log(req.body) gives you this:
{
description: 'group1',
value: '233',
group: '5e506f3c56233d08f79bc8f3'
}
..you should be able to do this:
router.post('/', verify, async (req, res) => {
console.log(req.body) // --> { description: 'group1', value: '233', group: '5e506f3c56233d08f79bc8f3' }
const post = new Movement({
description: req.body.description,
value: req.body.value,
groupId: req.body.group
// groupId: req.body.group._id //**tried this**
});
try {
const savedMovement = await post.save()
res.status(200).send(res.json({ data: savedMovement }));
} catch (error) {
res.status(400).send(res.json({ message: error }));
}
});