Blog App

A Ruby on Rails blog application with blogs and comments functionality.

Getting Started

This application demonstrates CRUD operations for blogs, nested comments, published/unpublished status, validations, and RESTful routing.

Setup Instructions (For New PC)

1. Extract the zip file

unzip blog_app_assignment.zip
cd blog_app

2. Install Ruby dependencies

bundle install

3. Create master key (if missing)

# Create a new master key or use dummy credentials
EDITOR="echo 'secret_key_base: $(rails secret)' >" rails credentials:edit
# Or simply create an empty master.key
echo "$(openssl rand -hex 32)" > config/master.key

4. Setup database

rails db:create
rails db:migrate
rails db:seed

5. Start the server

rails server

6. Visit the application

http://localhost:3000

Prerequisites

• Ruby 4.0.1 or higher
• Rails 8.1.2 or higher
• SQLite3
• Bundler

Installation

1. Install dependencies:

bundle install

2. Setup database:

rails db:create
rails db:migrate
rails db:seed

3. Start the server:

rails server

4. 4. Visit http://localhost:3000/blogs

Available Scripts

Database Commands

rails db:create
rails db:migrate
rails db:seed
rails db:reset
rails db:rollback

Server Commands

rails server
rails s
rails s -p 3001

Console

rails console
rails c

Routes

rails routes
rails routes | grep blogs

Generators

rails generate model ModelName field:type
rails generate controller ControllerName
rails generate scaffold ModelName field:type
rails generate migration MigrationName

Additional Commands

Testing in Console

rails console

Example queries:

Blog.published

blog = Blog.new(title: "Test", body: "Test content")
blog.valid?

blog = Blog.published.first
blog.comments.create(author: "John", content: "Great post!")

Blog.where(published: true)
Blog.find_by(title: "Published Blog 1")
Blog.limit(5)
Blog.order(created_at: :desc)

Features

• CRUD operations for blogs
• Nested comments under blogs
• Published/Unpublished status with scopes
• Validations (blogs and comments)
• RESTful routing
• API endpoints (JSON support)
• Seed data (20 blogs, comments)

Models & Database

Blog

• title (string) - required, 3-200 characters
• body (text) - required, minimum 10 characters
• published (boolean) - default: false
• Has many comments

Comment

• content (text) - required, minimum 5 characters
• author (string) - required
• Belongs to blog
• Can only be added to published blogs

Routes

GET    /blogs
POST   /blogs
GET    /blogs/:id
PATCH  /blogs/:id
DELETE /blogs/:id
PATCH  /blogs/:id/publish
GET    /blogs/:blog_id/comments
POST   /blogs/:blog_id/comments
DELETE /blogs/:blog_id/comments/:id

Project Structure

app/
├── controllers/
│   ├── blogs_controller.rb
│   └── comments_controller.rb
├── models/
│   ├── blog.rb
│   └── comment.rb
└── views/
    └── blogs/
config/
└── routes.rb
db/
├── migrate/
└── seeds.rb