New Rails Project
Let’s rails new to generate a new Rails project.
rails new demo --database mysql
We’re using the --database mysql option for the mysql database adapter since we later deploy this to AWS Lambda.
❯ rails new demo --database mysql
create
create README.md
create Rakefile
create .ruby-version
create config.ru
create .gitignore
create .gitattributes
create Gemfile
run git init from "."
create app
...
❯ mv demo rails
❯ cd rails
This gives us a starter Rails project.
Scaffold
Let’s use rails scaffolding to generate some code.
❯ cd rails
❯ rails generate scaffold post title:string body:text published:boolean
This gives us some basic CRUD actions.
Root Route: Home Page
Let’s also add a root route and point it to posts#index
config/routes.rb
Rails.application.routes.draw do
resources :posts
get "up" => "rails/health#show", as: :rails_health_check
root "posts#index" # <= ADD THIS
end
DB Migration
Let’s run the create the database and run the migration.
rails db:create db:migrate
Seeding Data
Let’s create some seed data to help with first. Create this file:
db/seeds.rb
2.times do |i|
i += 1
Post.find_or_create_by(title: "Post #{i}", body: "Body #{i}", published: true)
end
puts "Posts created"
Run rails db:seed
❯ rails db:seed
Posts created
Run rails runner to confirm that the records were created.
❯ rails runner 'puts Post.count'
2