Rails Tutorial 2章~3章

croud9とか使ってないんじゃ。
rvmで2.4入れてるんじゃ。
rubyの界隈では最新に追いついておくのが定石。
最新でウガーっとうなるのがよくあるパターン。
コミュニティが活発なのでなんとかなる。
この場合、
github.com
これ食らう。

そこでGemfileをtutorialからちといじる

source 'https://rubygems.org'

git_source(:github) do |repo_name|
  repo_name = "#{repo_name}/#{repo_name}" unless repo_name.include?("/")
  "https://github.com/#{repo_name}.git"
end


# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '5.0.1'
# Use Puma as the app server
gem 'puma', '3.4.0'
# Use SCSS for stylesheets
gem 'sass-rails', '5.0.6'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '3.0.0'
# Use CoffeeScript for .coffee assets and views
gem 'coffee-rails', '4.2.1'
# See https://github.com/rails/execjs#readme for more supported runtimes
# gem 'therubyracer', platforms: :ruby

# Use jquery as the JavaScript library
gem 'jquery-rails','4.1.1'
# Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
gem 'turbolinks', '5.0.1'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '2.4.1'
# Use Redis adapter to run Action Cable in production
# gem 'redis', '~> 3.0'
# Use ActiveModel has_secure_password
# gem 'bcrypt', '~> 3.1.7'

# Use Capistrano for deployment
# gem 'capistrano-rails', group: :development

group :development, :test do
  # Use sqlite3 as the database for Active Record
  gem 'sqlite3','1.3.11'
  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
  gem 'byebug','9.0.0', platform: :mri
end

group :development do
  # Access an IRB console on exception pages or by using <%= console %> anywhere in the code.
  gem 'web-console', '3.3.1'
  gem 'listen', '3.0.8'
  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
  gem 'spring','1.7.2'
  gem 'spring-watcher-listen', '2.0.0'
end

group :production do
  gem 'pg','0.18.4'
end

# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

5.0.1で治らんというひともいるけど我が環境では治った。

成果物
Home | Ruby on Rails Tutorial Sample App

cloud9ちょっと昼休みに使ったけどコレすごい良いね。
Emacsいらんやんとおもったり。

Emacsには
qiita.com
qiita.com
を入れて現代風。
flymakeは古いんじゃー。まだ設定ファイルに残っているけど。整理しなきゃだね。