Learning Mongoose and Basic Backend Form Handling

Welcome to the Learning Mongoose and Basic Backend Form Handling repository! This repository contains a series of tutorials and example code to help you get started with using Mongoose for MongoDB interactions and handling form submissions in a Node.js backend.

Table of Contents

1. Introduction
2. Prerequisites
3. Installation
4. Project Structure
5. Mongoose Basics
6. Backend Form Handling
7. Running the Project
8. Contributing
9. License

Introduction

This repository is designed to teach you the basics of using Mongoose, a popular MongoDB ODM (Object Data Modeling) library for Node.js, along with handling form submissions on the backend. By following the examples and tutorials in this repo, you'll learn how to:

• Connect to a MongoDB database using Mongoose
• Define and use Mongoose schemas and models
• Perform CRUD (Create, Read, Update, Delete) operations with Mongoose
• Handle form submissions in a Node.js Express server
• Validate and sanitize form data

Prerequisites

Before you begin, make sure you have the following installed on your machine:

• Node.js (v14 or higher)
• npm (Node Package Manager)
• MongoDB (local or cloud-based instance)

Installation

1. Clone the repository:

   git clone https://github.com/your-username/mongoose-backend-form-handling.git
   cd mongoose-backend-form-handling

2. Install the dependencies:

   npm install

Project Structure

Here's an overview of the project's structure:

mongoose-backend-form-handling/
├── models/
│   └── user.js        # Mongoose schema and model for User
├── routes/
│   └── form.js        # Express routes for form handling
├── views/
│   └── form.ejs       # EJS template for the form
├── .env               # Environment variables
├── app.js             # Main application file
├── package.json       # Project metadata and dependencies
└── README.md          # Project README file

const express = require("express"); const mongoose = require("mongoose"); const cors = require("cors"); const User = require("./models/user"); // Import the User model

const port = 3000; const app = express();

// Middlewares app.use(express.json()); app.use(cors());

// Mongoose connection mongoose.connect("mongodb://localhost:27017/SmartcrazeUser", { useNewUrlParser: true, useUnifiedTopology: true }) .then(() => console.log("Connected to MongoDB")) .catch((error) => console.error("Connection error:", error));

// Routes app.post("/register", async (req, res) => { try { const { email, username, name } = req.body;

const newUser = new User({
  email,
  username,
  name
});

await newUser.save();
res.status(201).send({ message: "User data saved successfully" });
console.log(newUser);

} catch (error) { console.error(error); res.status(500).send({ message: "Error saving user data", error: error.message }); } });

// Server startup app.listen(port, () => { console.log(Server running at http://localhost:${port}) })

const mongoose = require("mongoose");

const userSchema = new mongoose.Schema({ name: { type: String, required: true }, username: { type: String, required: true }, email: { type: String, required: true, unique: true } });

const User = mongoose.model("User", userSchema);

module.exports = User;