MVC and CRUD

mvc.md

Discuss the points below with your teammates and add your answers below in the comments

1. What is the best/most common file structure for backend NodeJS projects?
2. What is the MVC architecture? Why we will be using it?
3. Explore defining a schema in Mongoose, you can refer to this for more information (no answer in the comments required).
4. What are the CRUD operations? add an example code of each CRUD operations in Mongoose.

Mpho Oganne
Simphiwe Ndlovu
Pumlani Kewana

A well-organized file structure for backend Node.js projects can greatly enhance readability, maintainability, and scalability. A widely accepted and scalable structure is based on the principles of separation of concerns and modularization.

├── src/
│ ├── controllers/
│ │
│ ├── models/
│ │
│ ├── routes/
│ │
│ ├── middlewares/
│ │
│ ├── services
│ │
│ ├── utils/
│ │
│ ├── config/
│ │
│ ├── app.js
│
├── tests/
│
├─ .env
├── gitignore
├──package.json
├─ package-lock.json
└─ README.md

MVC architecture helps you to organize your web application and make it more manageable. It allows you to separate business logic from presentation logic, which makes it very easy to add new features or change existing ones without affecting the whole application.

5. CRUD - create, read , update and delete.

example 1:
Create

// lines of code ommitted

const User = mongoose.odel('user', userSchema);

// creating a new user (some code from external source, leetcode and chatgpt)

const createUser = async () = >
{

const newUser = new User ({
// details of users code ommitted for saving time
});

// error handling code omitted

createUser();

Read

const readUsers = async () => { const users = await User.find({ age: { $gte: 18 } });
console.log('Users:', users); }; readUsers();

Update

Delete

const deleteUserById = async (userId) => {
// wrap inside a try and catch error handling code omitted

const deletedUser = await user.findByIdAndDelete(userId);

deleteUserById('...'); // user id goes here.

const User = mongoose.model('User', userSchema); // Update a user const updateUser = async () => { const updatedUser = await User.findByIdAndUpdate( '60c72b2f9b1e8b001c8e4b6c', { age: 26 }, { new: true } ); updateUser();