This is most important artical that how to connect node js & mongodb and create Restfull API with separate models and controllers folder and separate file for server.js
In this article i have explained all these requirements into below article.
Step1st:
Install Mongoose and node js in your machine
npm insall mongoose
step2nd
Install express JS and moongoose in your machine
npm install express mongoose
Step3rd:
create two folders name it models and controllers and create one new
file server.js
create product.js file under models and productControllers.js file under controllers
Complete code of product.js file
const mongoose = require(‘mongoose’);
const productSchema = new mongoose.Schema({
name: { type: String, required: true },
price: { type: Number, required: true },
description: { type: String }
});
module.exports = mongoose.model(‘Product’, productSchema);
complete code of productscontroller.js
const Product = require(‘../models/product’);
exports.getAllProducts = async (req, res) => {
try {
const products = await Product.find();
res.json(products);
} catch (err) {
res.status(500).json({ message: err.message });
}
};
exports.getProductById = async (req, res) => {
try {
const product = await Product.findById(req.params.id);
if (!product) {
return res.status(404).json({ message: ‘Product not found’ });
}
res.json(product);
} catch (err) {
res.status(500).json({ message: err.message });
}
};
exports.createProduct = async(req,res)=>{
const pitems = new Product({
name: req.body.name,
price: req.body.price,
description: req.body.description
});
const product = await pitems.save();
if (!product) {
return res.status(404).json({ message: ‘Product not inserted’ });
}
res.json(product);
}
exports.updateProduct = async(req,res)=>{
const productId = req.params.id;
const updatedProduct = await Product.findByIdAndUpdate(
productId,
{
$set: {
name: req.body.name,
price: req.body.price,
description: req.body.description,
}
},
{ new: true } // This option returns the updated document
);
if (!updatedProduct) {
return res.status(404).json({ message: ‘Product not found’ });
}
return res.status(200).json(updatedProduct);
}
exports.deleteProduct = async(req,res)=>{
const productId = req.params.id;
const deletedProduct = await Product.findByIdAndDelete(productId);
if (!deletedProduct) {
return res.status(404).json({ message: ‘Product not found’ });
}
return res.status(200).json({ message: ‘Product deleted successfully’ });
}
complete code of server.js , it is start-up file to define set of path.
const express = require(‘express’);
const mongoose = require(‘mongoose’);
const app = express();
const port = 3000;
// Connect to MongoDB
mongoose.connect(‘mongodb://localhost:27017/rentalservices’, {
useNewUrlParser: true,
useUnifiedTopology: true,
})
.then(() => console.log(‘Connected to MongoDB’))
.catch(err => console.error(‘MongoDB connection error:’, err));
// Models
const Product = require(‘./models/product’);
// Controllers
const productController = require(‘./controllers/productController’);
// Middleware
app.use(express.json());
// Routes
app.get(‘/products’, productController.getAllProducts);
app.get(‘/products/:id’, productController.getProductById);
app.post(‘/products’, productController.createProduct);
app.put(‘/products/:id’, productController.updateProduct);
app.delete(‘/products/:id’, productController.deleteProduct);
app.listen(port, () => {
console.log(`Server listening on port ${port}`);
});
now you can run node server.js
install reqbin extension on google chrome and test api on localhost
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