Rails new project generation - Mini Project: Build & Apply

Rails New Project Generation

📖 Scenario: You want to create a new web application using Ruby on Rails. This app will help you manage a simple blog with posts and comments.

🎯 Goal: Learn how to generate a new Rails project with the correct setup and basic configuration.

📋 What You'll Learn

Create a new Rails project named blog_app

Set the database to postgresql

Add a configuration variable for the Rails environment

Generate a scaffold for Post with title:string and body:text

Run the database migration to create the posts table

💡 Why This Matters

🌍 Real World

Creating a new Rails project is the first step in building web applications like blogs, e-commerce sites, or social platforms.

💼 Career

Understanding Rails project setup is essential for backend web developers working with Ruby on Rails frameworks.

1

Create a new Rails project

Run the command to create a new Rails project called blog_app using the postgresql database.

Ruby on Rails

# Run the rails new command here

Need a hint?

Use rails new blog_app -d postgresql to create the project with PostgreSQL as the database.

2

Set Rails environment variable

Inside the blog_app directory, create a file called .env and add a line to set the Rails environment variable RAILS_ENV to development.

Ruby on Rails

rails new blog_app -d postgresql
# Create .env file and add RAILS_ENV=development

Need a hint?

Create a file named .env and write RAILS_ENV=development inside it.

3

Generate Post scaffold

Run the Rails generator command to create a scaffold for Post with a title of type string and a body of type text.

Ruby on Rails

rails new blog_app -d postgresql

# In the blog_app directory, create a .env file with:
# RAILS_ENV=development
# Run scaffold generator for Post

Need a hint?

Use rails generate scaffold Post title:string body:text to create the Post scaffold.

4

Run database migration

Run the command to migrate the database and create the posts table based on the scaffold.

Ruby on Rails

rails new blog_app -d postgresql

# In the blog_app directory, create a .env file with:
# RAILS_ENV=development

rails generate scaffold Post title:string body:text
# Run database migration

Need a hint?

Run rails db:migrate to apply the database changes.