mongoose.js

mongoose.js

const express = require('express');
const app = express();
const mongoose = require('mongoose');

app.use(express.json());
app.listen(3000);

const userRouter = express.Router();
//Provide me the base url and the mini app that I will use.
//base Route, RouterToUse
app.use('/user', userRouter);

userRouter
.route('/')
.get(getUsers)
.post(postUser)
.patch(updateUser)
.delete(deleteUser)
let db_link = 'mongodb+srv://admin:[email protected]/?retryWrites=true&w=majority';
mongoose.connect(db_link)
.then((db)=>{
    console.log("db connected");
})
.catch(err=>{
    console.log(err);
})

//Now creating scheme==>This is possible here only due to mongoose
const userSchema = mongoose.Schema({
    name:{
        type:String,
        required:true
    },
    email:{
        type:String,
        required:true,
        unique:true
    },
    password:{
        type:String,
        required:true,
        minLength:6
    },
    confirmPassword:{
        type:String,
        required:true,
        minLength:6
    }
})

//Now making model
const userModel=mongoose.model('userModel', userSchema);
//In mongoose.model we write name of the model(your choice) and schema this model should use

(async function createUser(){
    let user = {
        name:"Deeksha",
        email:"[email protected]",
        password:"123456",
        confirmPassword:"123456",
    };
    //Now creating this user in database
    let data = await userModel.create(user);
    console.log(data);
    //In data it will return the data it has put in database i.e user object itself

})();

/***********READ REQUEST**********/
async function getUsers(req, res){
    let allUsers = await userModel.find();
    res.status(200).json({message:"list of users", data:allUsers});
    let singleUser = await userModel.findOne({name:"Deeksha"});
    res.status(200).json({message:"User is", data:singleUser});
}

 /******POST REQUEST**************/
async function postUser(req, res){
    let dataObj = req.body;
    let user = await userModel.create(dataObj);
    res.json({
        message:"data received",
        user:user,
    })
}

 /******PATCH REQUEST**************/
async function updateUser(req, res){
    let dataToBeUpdated = req.body;
    let result = await userModel.findOneAndUpdate({email:"[email protected]"}, dataToBeUpdated);
    res.status(200).json({message:"Data Updated", result:result});
}


 /******DELETE REQUEST**************/
async function deleteUser(req, res){
     let dataToBeDeleted = req.body;
    let user = await userModel.findOneAndDelete(dataToBeDeleted);
    res.json({message:"User Deleted", data:user});
}