Node js Crud Application Step by Step

this tutorials we are going to teach node js crud application how to do the basic crud operation those are create,update,delete,search,view.

Create the Node Js Project Type on type command prompt

npm init

and press enter key.after that you have the fill configation of project.after done stuff you
will get the package.json file.

after that you have to install the following dependencies

Express
body-parser

After done the stuff you have to create the file server.js

Server.js

const express = require('express')
const server = express()
const port = 5000

const routes = require('./routes/routes')

server.use(express.json());
server.use(routes);


server.listen(port, () => {
  console.log(`Server port ${port}`)
})

inside the project create the folder routes inside the route folder create the page routes.js

routes.js

const express = require('express')
const router = express.Router()

const employee = require('./employee')

router.use('/employee',employee);

module.exports = router

inside the route folder create the file employee

employee

const express = require('express')
const employee = express.Router()
const employeeList = require('./db/employeeList')
const bodyp = require('body-parser')

employee.use(bodyp.json())
employee.use(bodyp.urlencoded({ extended : true}))


employee.get('/', (req, res) => 
{
    if(employeeList)
    {
        res.send(employeeList) 
    }
    else
    {
        res.status(404).send({msg : "Empty List"})
    }

   
})

employee.get('/:id', (req, res) => 
{
 const found = employeeList.some(employee =>  employee.id === parseInt(req.params.id));
 if(found){
     res.send(employeeList.filter(employee =>  employee.id === parseInt(req.params.id)))
 }
 else
 {
     res.status(404).send({msg: `${req.params.id} is not found in employee list`})
 }
})


employee.post('/add', (req, res) => 
{

 const employee = req.body

  if(employee.id && employee.name && employee.address && employee.phone  && employee.active)
  {
      employeeList.push(employee)
      return res.send(employeeList)
  }
  else
  {
      res.status(400).send({msg: `member cannot save`})
  }
})


employee.put('/:id', (req, res) => 
 {

  const updateEmployee = req.body
  const found = employeeList.some(employee =>  employee.id === parseInt(req.params.id));

   if(!found)
   {
     
       return res.status(400).send({msg: `member not found`})
   }   
   if(employee.id && employee.name && employee.address && employee.phone  && employee.active)
   {
    employeeList.push(employee)
       return res.send(employeeList)
   }

   else
   {
    employeeList.forEach(employee =>{
        if(employee.id === parseInt(req.params.id))
        {
            employee.name = updateEmployee.name ? updateEmployee.name : employee.name,
            employee.address = updateEmployee.address ? updateEmployee.address : employee.address,
            employee.phone = updateEmployee.phone ? updateEmployee.phone : employee.phone,
            employee.active = updateEmployee.active ? updateEmployee.active : employee.active
            return res.send(employeeList);

        }
    })
   } 

   res.status(400).send({msg: `employeeList cannot update`})



})


employee.delete('/:id', (req, res) => 
{
    const found = employeeList.some(employee =>  employee.id === parseInt(req.params.id))

  if(found)
  {
    res.send(employeeList.filter(employee =>  employee.id !== parseInt(req.params.id)))

  }
  else
  {
      res.status(400).send({msg: `employee cannot delete`})
  }
})


module.exports = employee

inside the route folder create a folder db inside the folder i created the file employeeList.js

employeeList.js

let employeeList = [

 {
  id : 1,
  name : "raja",
  address : "india",
  phone : 2323232,
  active : true

 },
 {
  id : 2,
  name : "kumar",
  address : "india",
  phone : 4353453,
  active : true

 },
 {
  id : 3,
  name : "nira",
  address : "india",
  phone : 989879,
  active : true

 },
]
module.exports = employeeList