App folder organization in Ruby on Rails - Mini Project: Build & Apply

Organize a Rails App Folder

📖 Scenario: You are starting a new Ruby on Rails project for a simple blog website. To keep your project clean and easy to understand, you need to organize the main folders and files inside the app directory properly.

🎯 Goal: Learn how to create the basic folder structure inside the app folder of a Rails project, including models, views, and controllers folders, and add a simple Ruby file inside the models folder.

📋 What You'll Learn

Create the main folders inside the app directory: models, views, and controllers

Add a Ruby file named post.rb inside the models folder

Inside post.rb, define a class Post that inherits from ApplicationRecord

Create a configuration variable MAX_POSTS inside post.rb and set it to 10

Add a method self.max_posts inside the Post class that returns the value of MAX_POSTS

💡 Why This Matters

🌍 Real World

Organizing the app folder correctly is essential for Rails projects to keep code clean and maintainable. It helps developers find files quickly and follow Rails conventions.

💼 Career

Understanding Rails folder structure and how to create models, views, and controllers is a fundamental skill for Rails developers working on web applications.

1

Create the main folders inside app

Create three folders inside the app directory named models, views, and controllers.

Ruby on Rails

# Create folders: app/models, app/views, app/controllers
# Your code here

Need a hint?

In your Rails project folder, create three new folders named exactly models, views, and controllers inside the app folder.

2

Add post.rb file with Post class

Inside the models folder, create a file named post.rb. In this file, define a class called Post that inherits from ApplicationRecord.

Ruby on Rails

# Inside app/models/post.rb
class Post < ApplicationRecord
  # Your code here
end

Need a hint?

Define a Ruby class named Post that inherits from ApplicationRecord inside post.rb.

3

Add a configuration variable MAX_POSTS

Inside the Post class in post.rb, add a constant variable named MAX_POSTS and set it to 10.

Ruby on Rails

class Post < ApplicationRecord
  # Define MAX_POSTS constant here
  # Your code here
end

Need a hint?

Inside the Post class, write MAX_POSTS = 10 to create a constant.

4

Add a class method self.max_posts returning MAX_POSTS

Inside the Post class in post.rb, add a class method named self.max_posts that returns the value of the constant MAX_POSTS.

Ruby on Rails

class Post < ApplicationRecord
  MAX_POSTS = 10
  # Define self.max_posts method here
  # Your code here
end

Need a hint?

Define a class method self.max_posts that returns MAX_POSTS inside the Post class.