Create/Launch new Product API +Update an Delete Product by Admin, Get Product Details by customer API Nodejs , MongoDB MERN Stack
// Create Required following files mentioned in previous post = https://vasubirla.blogspot.com/2023/02/register-new-user-login-user-delete.html
config.env
Server.js
//app.js
/utilsfolder/errorhander.js
/utils/jwtToken.js file
3. /utils/sendEmail.js file
//Create Product Model - and import it in ProductController
//ProductModel.js
const mongoose = require('mongoose');
const ProductSchema = new mongoose.Schema({
name: {
type:String,
required:[true,"please enter produt name"],
trim:true
},
description: {
type:String,
required:[true,"please add product description"]
},
price: {
type:Number,
required:[true,"Product Price is required"],
maxLength:[8,"price cannot be exceed 8 character"]
},
ratings: {
type:Number,
default:0
},
image: [
{
public_id: {
type:String,
required:true
},
url: {
type:String,
required:true
}
}
],
category: {
type:String,
required:[true,"Please enter Product Category"]
},
stock:{
type:Number,
required:[true,"Product stoke limit required"],
maxLength:[4,"stoke cannot be exceed 4 char"],
default:1
},
numOfReviews:{
type:Number,
default:0
},
reviews: [
{
user:{
type: mongoose.Schema.ObjectId,
ref:"user",
required:true
},
name:{
type:String,
required:true
},
rating:{
type:Number,
required:true
},
comment:{
type:String,
required:true
}
}
],
createdAt:{
type:Date,
defualt:Date.now
}
})
module.exports = mongoose.model("Product",ProductSchema)
//Create ProductController.js and import it in route
//ProductController.js
const Product = require('../models/productModel');
const ErrorHander = require('../utils/errorhander');
const catchAsyncError = require('../middleware/catchAsyncError')
const ApiFeatures = require('../utils/apifeatures')
//create/add or Launch New Products to sell on website --by Admin
exports.createProduct = catchAsyncError(
async (req,res,next)=>{
const product = await Product.create(req.body);
res.status(201).json({
success:true,
product
})
}
)
//==create Product API Testing on Postman
//Get Products Details on HomePage by different Customers or Visiters
exports.getAllProduct =catchAsyncError( async (req,res)=>{
console.log("Hited from React End")
const resultPerPage = 5; // show 5 product per page
const productCount = await Product.countDocuments()
const apiFeatures = new ApiFeatures(Product.find(),req.query).search().filter().pagination(resultPerPage)
const products = await apiFeatures.query //await Product.find()
res.status(200).json({
success:true,
products,
productCount
});
}
)
//== Get products API Testing on Postman =
//get perticular Product Details
exports.getProductDetails =catchAsyncError( async (req,res,next)=>{
const product = await Product.findById(req.params.id)
if(!product){
return next(new ErrorHander("Product Not Found",404))
}
else{
res.status(200).json({
success:true,
product
})
}
}
)
//=====Open Perticular Product DEtails API Testing - Postman (with wrong ID)
//Update Product -- Admin
exports.updateProduct = catchAsyncError( async (req,res,next)=>{
let product = await Product.findById(req.params.id)
if(!product){
res.status(500).json({
success:false,
message:"Product not found"
})
}
product = await Product.findByIdAndUpdate(req.params.id,req.body,{
new:true,
runValidators:true,
useFindAndModify:false
})
res.status(200).json({
success:true,
product
})
}
)
//========Update Product API testing - only Admin can update - Postman
//=======delete Products=============================
exports.deleteProduct =catchAsyncError( async(req,res,next)=>{
const product = await Product.findById(req.params.id)
if(!product){
res.status(500).json({
success:false,
message:"Product not found"
}) // or we can use this line return next(new ErrorHander("Product Not Found",404))
}
else {
await Product.findByIdAndDelete(req.params.id,req.body);
res.status(200).json({
success:true,
message:"Product Deleted Successfully"
})
}
}
)
//Give Product Review or Update it if already exists =========================================
exports.createProductReview = catchAsyncError(async(req,res,next)=>{
const { rating,comment, productId} = req.body;
const review = {
user:req.user.id,
name:req.user.name,
rating,
comment
}
const product = await Product.findById(productId);
const isReviewed = product.reviews.find(
(rev)=>rev.user.toString()=== req.user._id.toString()
)
//here rev.user who already made reviewed and req.user._id is also your Id - If Both ID is same and Review already exists by you then it will be updated
if(isReviewed)
{
product.reviews.forEach(rev=>{
if(rev.user.toString()=== req.user._id.toString())
{
rev.rating = rating,
rev.comment = comment
}
})
}
else
{
product.reviews.push(review)
product.numOfReviews = product.reviews.length
}
//Overall Rating = Total Rating divided by length of Rating
let avg = 0
product.reviews.forEach( rev=>{
avg=avg+rev.rating
})
product.ratings = avg/product.reviews.length
await product.save({validateBeforeSave:false})
res.status(200).json({
success:true,
message:"You have rated this Product Successfully !!"
})
})
//Get All Reviews of Product ========
exports.getProductReviews = catchAsyncError(async (req,res,next)=>{
const product = await Product.findById(req.query.id)
if(!product){
return next(new ErrorHander("Product or Review Found ",404))
}
else{
res.status(200).json({
success:true,
reviews:product.reviews
})
}
})
//Delete Review of Product
exports.deleteReview = catchAsyncError(async (req,res,next)=>{
const product = await Product.findById(req.query.productId)
if(!product){
console.log("No Product found")
return next(new ErrorHander("Product Not Found",404))
}
else{
//now in review that all reviews are assigned which we dont want to delete using filter
const reviews = product.reviews.filter(rev=> rev._id.toString() !== req.query.id.toString());
// now after deleteing review Overall Averaging Rating, Num of rating also should be updated
let avg = 0
reviews.forEach( rev=>{
avg=avg+rev.rating
})
const ratings = avg/reviews.length
const numOfReviews = reviews.length
await Product.findByIdAndUpdate(req.query.productId,{
reviews ,ratings, numOfReviews
},
{
new:true,
runValidators:true,
useFindAndModify:false
})
res.status(200).json({
success:true,
message:"Your Review has Been deleted "
})
}
})
//Create ProductRoute.js
//===== ProductRoute.js
const express = require('express');
const {getAllProduct,
createProduct,
updateProduct,
deleteProduct,
getProductDetails, createProductReview, getProductReviews, deleteReview} = require('../controllers/productController.js');
const { isAuthenticatedUser, authorizeRoles } = require('../middleware/auth.js');
const router = express.Router();
router.route('/products').get(getAllProduct);
router.route('/products/new').post(isAuthenticatedUser, authorizeRoles("admin"),createProduct);
router.route('/products/:id').put(isAuthenticatedUser, authorizeRoles("admin"),updateProduct);
router.route('/products/:id').delete(isAuthenticatedUser, authorizeRoles("admin"),deleteProduct);
router.route('/products/:id').get(getProductDetails );
router.route('/review').put(isAuthenticatedUser, createProductReview )
router.route('/reviews').get(getProductReviews)
router.route('/reviews').delete(isAuthenticatedUser,deleteReview)
module.exports = router
=================== End===============
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