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Last active May 16, 2023 15:16
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Single File Rails
### BUNDLER
require "bundler/inline"
gemfile(true) do
source "https://rubygems.org"
ruby '2.4.1'
gem "rails"
gem "sqlite3"
#gem 'responders'
#gem "sassc-rails"
#gem "uglifier"
#gem 'nokogiri'
#gem 'slim'
#gem 'simple_form'
group :development do
gem "byebug"
#gem 'binding_of_caller'
#gem 'better_errors'
end
group :test do
gem 'rails-controller-testing'
gem 'minitest-reporters', require: false
#gem 'connection_pool', require: false
#gem 'database_cleaner', require: false
end
end
require "rails/all"
# OR individually choosing specific needed modules only
# [
# 'active_record/railtie',
# 'action_controller/railtie',
# 'action_view/railtie',
# 'action_mailer/railtie',
# 'active_job/railtie',
# 'action_cable/engine',
# 'rails/test_unit/railtie',
# 'sprockets/railtie'
# ].each do |railtie|
# begin
# require railtie
# rescue LoadError
# end
# end
### DATABASE / SCHEMA
db = "database.sqlite3"
ActiveRecord::Base.establish_connection(adapter: "sqlite3", database: db)
ActiveRecord::Base.logger = Logger.new(STDOUT)
start_new = !File.exist?(db)
start_new = true # comment out if you dont always want a fresh db
if start_new
ActiveRecord::Schema.define do
if start_new || !ActiveRecord::Base.connection.table_exists?('books')
create_table :books, force: true do |t|
t.string :name
t.references :category
t.boolean :active, default: false, null: false
t.timestamps
end
end
if start_new || !ActiveRecord::Base.connection.table_exists?('categories')
create_table :categories, force: true do |t|
t.string :name
t.timestamps
end
end
end
end
### CONFIG / ROUTES
class SingleFileApp < Rails::Application
secrets.secret_token = "secret_token"
secrets.secret_key_base = "secret_key_base"
config.logger = Logger.new($stdout)
Rails.logger = config.logger
routes.draw do
resources :books
root to: "books#index"
end
end
### MODELS
class Book < ActiveRecord::Base
belongs_to :category
validates :name, presence: true, uniqueness: {case_sensitive: false}
end
class Category < ActiveRecord::Base
has_many :categories
validates :name, presence: true, uniqueness: {case_sensitive: false}
end
### CONTROLLERS
class BooksController < ActionController::Base
include Rails.application.routes.url_helpers
def index
@books = Book.all
render inline: "# of books: <%= @books.count %>"
# TODO how to render slim files
end
end
### TESTING
#require "minitest/autorun" # manually calling run below
require 'minitest/reporters'
Minitest::Reporters.use!
class BookTest < Minitest::Test
def test_books
Book.create!(name: 'foo', category_id: 1)
assert_equal Book.count, 1
end
end
class BooksControllerTest < Minitest::Test
include Rack::Test::Methods
def test_index
get "/books"
assert last_response.ok?
assert last_response.body.include?("# of books")
end
private
def app
Rails.application
end
end
exit_code = Minitest.run
if !exit_code ### this if logic looks backwards, to be confirmed?
exit(exit_code)
end
### SERVE REQUESTS
require "rails/command"
require "rails/commands/server/server_command"
Rails::Server.new({
app: SingleFileApp,
Host: (ENV["HOST"] || "0.0.0.0"),
Port: (ENV["PORT"] || 3000),
}).start
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