Last Updated: November 21, 2025

Ruby on Rails

Full-stack web framework for Ruby

MVC Components

Item	Description
`Model`	Business logic and database interaction
`View`	User interface templates (ERB)
`Controller`	Handles requests and responses
`Migration`	Database schema changes
`Route`	URL to controller mapping

Common Commands


        rails new myapp

Create new Rails app


        rails generate model User name:string email:string

Generate model


        rails generate controller Users

Generate controller


        rails db:migrate

Run pending migrations


        rails server

Start development server


        rails console

Interactive console

Controller Example

class UsersController < ApplicationController
  before_action :set_user, only: [:show, :update, :destroy]

  def index
    @users = User.all
    render json: @users
  end

  def create
    @user = User.new(user_params)
    if @user.save
      render json: @user, status: :created
    else
      render json: @user.errors, status: :unprocessable_entity
    end
  end

  private

  def user_params
    params.require(:user).permit(:name, :email)
  end
end

Best Practices

Follow RESTful conventions
Use strong parameters for security
Keep controllers thin, models fat
Use partials to DRY up views

💡 Pro Tips

Quick Reference

Use rails generate scaffold for rapid prototyping

← Back to Programming Languages | Browse all categories | View all cheat sheets

Ruby on Rails | Sheetly Cheat Sheet