Controller generation in Ruby on Rails - Mini Project: Build & Apply

Controller generation

📖 Scenario: You are building a simple blog application using Ruby on Rails. You need to create a controller to manage blog posts.

🎯 Goal: Create a Rails controller named PostsController with an index action that will later display all blog posts.

📋 What You'll Learn

Create a controller named PostsController

Add an index action method inside the controller

Ensure the controller inherits from ApplicationController

Use Rails conventions for controller generation

💡 Why This Matters

🌍 Real World

Controllers in Rails handle web requests and decide what to show users. Creating controllers is a core part of building web apps.

💼 Career

Rails developers frequently generate and customize controllers to build features and manage app flow.

1

Create the PostsController file

Create a file named posts_controller.rb inside the app/controllers directory with a class named PostsController that inherits from ApplicationController.

Ruby on Rails

# Your code here

Need a hint?

Remember, Rails controllers are classes that inherit from ApplicationController.

2

Add the index action

Inside the PostsController class, add an empty method named index to serve as the action for listing posts.

Ruby on Rails

class PostsController < ApplicationController
  # Add the index action method below
  # Your code here
end

Need a hint?

Actions in Rails controllers are defined as methods inside the controller class.

3

Generate the controller using Rails command

Write the Rails command to generate a controller named Posts with an index action. This command will create the controller file and the view folder automatically.

Ruby on Rails

# Your code here

Need a hint?

Use the rails generate controller command followed by the controller name and action names.

4

Add a route for the index action

In the config/routes.rb file, add a route that maps the root URL / to the index action of the PostsController using the syntax root 'posts#index'.

Ruby on Rails

# Add the root route below
# Your code here

Need a hint?

The root route defines what page loads when visiting the base URL of your app.