first commit

.gitignore

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+**node_modules
+**.env
+**package-lock.json

controllers/product.controller.js

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+const Product = require('../models/product.model');
+
+//see all products
+const getProducts = async (req, res) => {
+    try{
+        const products = await Product.find({});
+        res.status(200).json({products});
+    } catch (error) {
+        res.status(500).json({message: error.message});
+    }
+};
+
+//see one product
+const getProduct = async (req, res) => {
+    try{
+        const {id} = req.params;
+        const product = await Product.findById(id);
+        res.status(200).json(product);
+    } catch (error) {
+        res.status(500).json({message: error.message});
+    }
+};
+
+//create a product
+const createProduct = async (req, res) => {
+    try{
+        const product = await Product.create(req.body);
+        res.status(200).json(product);
+    } catch (error) {
+        res.status(500).json({message: error.message});
+    }
+};
+
+//update the product
+const updateProduct = async (req, res) => {
+    try{
+        const {id} = req.params;
+        const product = await Product.findByIdAndUpdate(id, req.body);
+
+        if(!product) {
+            return res.status(404).json({message: "Product not found"});
+        }
+
+        const updatedProduct = await Product.findById(id);
+        res.status(200).json(updatedProduct);
+    } catch (error) {
+        res.status(500).json({message: error.message});
+    }
+};
+
+//delete the product
+const deleteProduct = async (req, res) => {
+    try{
+        const {id} = req.params;
+        const product = await Product.findByIdAndDelete(id);
+
+        if(!product) {
+            return res.status(404).json({message: "Product not found"});
+        }
+
+        res.status(200).json({message: "Product deleted successfully"});
+    } catch {
+        res.status(500).json({message: error.message});
+    }
+};
+
+module.exports = {
+    getProducts,
+    getProduct,
+    createProduct,
+    updateProduct,
+    deleteProduct
+};

index.js

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+const express = require("express");
+const mongoose = require("mongoose");
+const Product = require("./models/product.model.js"); //fetch schema
+const productRoutes = require("./routes/product.route.js");
+import { config } from "dotenv";
+config();
+const app = express();
+
+//middleware to use json and form types
+app.use(express.json());
+app.use(express.urlencoded({ extended: false }));
+
+//routes
+app.use("/api/products", productRoutes);
+
+//for generalization
+app.get("/", (req, res) => {
+  res.send("Hello from Node API server Updated!");
+});
+
+//if in one file i.e. NO MVC
+// //read api
+// app.get("/api/products", async (req, res) => {
+//   try {
+//     const products = await Product.find({});
+//     res.status(200).json(products);
+//   } catch {
+//     res.status(500).json({ message: error.message });
+//   }
+// });
+
+// //read api of a particular product using its id
+// app.get("/api/product/:id", async (req, res) => {
+//   try {
+//     const { id } = req.params;
+//     const product = await Product.findById(id);
+//     res.status(200).json(product);
+//   } catch {
+//     res.status(500).json({ message: error.message });
+//   }
+// });
+
+// //update api
+// app.put("/api/product/:id", async (req, res) => {
+//   try {
+//     const { id } = req.params;
+
+//     const product = await Product.findByIdAndUpdate(id, req.body);
+
+//     if (!product) {
+//       return res.status(404).json({ message: "Product not found" });
+//     }
+
+//     const updatedProduct = await Product.findById(id);
+//     res.status(200).json(updatedProduct);
+//   } catch {
+//     res.status(500).json({ message: error.message });
+//   }
+// });
+
+// //delete api
+// app.delete("/api/product/:id", async (req, res) => {
+//     try{
+//         const {id} = req.params;
+
+//         const product = await Product.findByIdAndDelete(id);
+
+//         if(!product) {
+//             return res.status(404).json({message: "Product not found"})
+//         }
+
+//         res.status(200).json({message: "Product deleted succesfully"});
+//     } catch {
+//         res.status(500).json({message: error.message});
+//     }
+// })
+
+// //create api
+// app.post("/api/products", async (req, res) => {
+//   try {
+//     const product = await Product.create(req.body);
+//     res.status(200).json(product);
+//   } catch (error) {
+//     res.status(500).json({ message: error.message });
+//   }
+// });
+
+mongoose
+  .connect(process.env.MONGODB_URL)
+  .then(() => {
+    console.log("Connected to database!"),
+      app.listen(3000, () => {
+        console.log("Server is running on port 3000");
+      });
+  })
+  .catch(() => {
+    console.log("Connection failed!");
+  });

models/product.model.js

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+const mongoose = require("mongoose");
+
+const ProductSchema = mongoose.Schema(
+  {
+    name: {
+      type: String,
+      required: [true, "Please enter your name"],
+    },
+
+    quantity: {
+      type: Number,
+      required: true,
+      default: 0,
+    },
+
+    price: {
+      type: Number,
+      required: true,
+      default: 0,
+    },
+
+    image: {
+      type: String,
+      required: false,
+    },
+  },
+  {
+    timestamps: true,
+  }
+);
+
+const Product = mongoose.model("Product", ProductSchema);
+
+module.exports = Product;

package.json

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+{
+  "name": "crud",
+  "version": "1.0.0",
+  "description": "Crud operations on project using Node, Express, MongoDB",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "serve": "node index.js",
+    "dev": "nodemon index.js"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/himanshu-hg-github/Crud.git"
+  },
+  "author": "Himanshu Gupta HG",
+  "license": "ISC",
+  "bugs": {
+    "url": "https://github.com/himanshu-hg-github/Crud/issues"
+  },
+  "homepage": "https://github.com/himanshu-hg-github/Crud#readme",
+  "dependencies": {
+    "express": "^4.19.2",
+    "mongodb": "^6.7.0",
+    "mongoose": "^8.4.1"
+  },
+  "devDependencies": {
+    "nodemon": "^3.1.3"
+  }
+}

routes/product.route.js

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+const express = require('express')
+const router = express.Router();
+const {getProducts, getProduct, createProduct, updateProduct, deleteProduct} = require('../controllers/product.controller.js')
+
+
+router.get('/', getProducts);   //see all products
+
+router.get('/:id', getProduct); //see one product
+
+router.post('/', createProduct);    //create a product
+
+router.put('/:id', updateProduct);      //update the product
+
+router.delete('/:id', deleteProduct);   //delete the product
+
+
+module.exports = router;