How to resolve post method which continues loading in postman - node.js

Question

I'm new in Express.js,MongoDb and mongoose, I have created HTTP request methods, but when running the Post method, nothing done (nothing saved in the database), and postman continues loading and it stops only when I cancel.
I want to know what's wrong in my code, thank you .
this is my routes file 'department.js':
const express = require("express");
const router = express.Router();
const Department = require("../models/department")
router.get("/v1/departments", async (req, res) => {
try {
const departments = await Department.find({ isDeleted: false })
if (!departments) {
return res.status(404).send()
}
res.status(200).send()
} catch (error) {
res.status(500).send(error)
}
});
router.get("/v1/department/:id", async (req, res) => {
//test if the department exist => by id
const _id = req.params._id
try {
const depatment = await Department.findByid(_id, { isDeleted: false })
if (!depatment) {
return res.status(404).send()
}
res.status(200).send(depatment)
} catch (error) {
res.status(500).send(error)
}
});
router.post("/department", async (req, res) => {
const department = new Department(req.body) //this param is for testing the post methode by sending request from postman
try {
await department.save()
// res.status(201).send(department)
} catch (error) {
res.status(500).send(error)
}
});
router.put("/v1/department/:id", async (req, res) => {
//updates , allowedUpdates ,isValideOperations : those constants are used for checking if the updated fields exists or not !
//especially useful when testing the put method using postman
const updates = Object.keys(req.body)
const allowedUpdates = ['name', 'email']
const isValideOperations = updates.every((update) => allowedUpdates.includes(update)) //isValideOperations return true if all keys exists
if (!isValideOperations) {
return res.status(400).send({ error: 'Invalid updates' })
}
try {
const _id = req.params.id
const department = await Department.findByIdAndUpdate(_id)
if (!department) {
return res.status(404).send()
}
res.send(department)
} catch (error) {
res.status(500).send(error)
}
})
//Safe delete by updating the field isDeleted to true
router.delete('/v1/department/:id', async (req, res) => {
try {
const _id = req.params.id
const department = await Department.findByIdAndUpdate(_id, { isDeleted: true })
if (!department) {
return res.status(400).send()
}
res.status(200).send(department)
} catch (error) {
res.status(500).send(error)
}
})
module.exports = router
And this is the Model
const mongoose = require("mongoose");
const validator = require('validator')
const Department = mongoose.model('Department', {
name: {
type: String,
required: true,
}
,
email: {
type: String,
required: true,
trim: true,
lowercase: true,
validate(value) {
if (!validator.isEmail(value)) {
throw new Error('Invalid email!')
}
}
}
,
createdBy: {
type: String,
default: 'SYS_ADMIN'
}
,
updatedBy: {
type: String,
default: 'SYS_ADMIN'
}
,
createdAt: {
type: Date
// ,
// default: Date.getDate()
}
,
updatedAt: {
type: Date
// ,
// default: Date.getDate()
},
isDeleted: {
type: Boolean,
default: false
}
})
module.exports = Department
this is Index.js (the main file)
const express = require("express");
const app = express()
const departmentRouter = require("../src/routes/department")
app.use(express.json())
app.use(departmentRouter)
//app.use('/', require('./routes/department'))
const port = process.env.PORT || 3000;//local machine port 3000
app.listen(port, () => (`Server running on local machine port ${port} 🔥`));

Answer 1

In order for you to get a response in Postman (or in an API call in general), you must actually send back a response, whether it's with sendFile, render, json, send, etc. These methods all call the built-in res.end which sends back data. However you commented out res.send which is the reason

Answer 2

I think you forget to add '/v1' in this route. it should be
router.post("/v1/department", async (req, res) => {
const department = new Department(req.body) //this param is for testing the post methode by sending request from postman
try {
await department.save()
// res.status(201).send(department)
} catch (error) {
res.status(500).send(error)
}
});