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Railsのアプリケーション(MySQL)をheroku(PostgreSQL)にデプロイした

Last updated at Posted at 2018-12-02

#はじめに
MySQL、solidusで運用されているECサイトアプリケーションをherokuにデプロイする過程でかなり苦労したので、自分の確認用としてメモに残します。
よろしければ参考にしてみてください。

# 実行環境
 ruby 2.4.1
 rails 5.1.4
 solidus 2.3
 mysql2 0.4.9 

##1.database.ymlの変更

database.yml
#変更前
production:
  <<: *default
  database: hogehoge_production
  username: hogehoge
  password: <%= ENV['HOGEHOGE_DATABASE_PASSWORD'] %>

#変更後 passwordは空白でOKです
production:
  <<: *default
  adapter: postgresql
  encoding: unicode
  database: db/production.postgresql
  pool: 5
  username: test_postgre
  password:

##2.gitignoreの確認

# 下記のように/bundleが.gitignoreに追加されていたら
/vendor/bundle

# /bundleを含めないように変更
/vendor

# git addして管理対象に含める
git add

# Gitの管理対象に入っているか確認
git ls-files | sed -e '/^[^\/]*$/d' -e 's/\/[^\/]*$//g' | sort | uniq

# 入っていなければ手動で追加
git add /vendor

##3.application.rbの変更

# 以下をconfig/application.rbに追加

config.assets.initialize_on_precompile = false
config/application.rb
require_relative 'boot'

require "rails"
# Pick the frameworks you want:
require "active_model/railtie"
require "active_job/railtie"
require "active_record/railtie"
require "action_controller/railtie"
require "action_mailer/railtie"
require "action_view/railtie"
require "action_cable/engine"
require "sprockets/railtie"
# require "rails/test_unit/railtie"

# Require the gems listed in Gemfile, including any gems
# you've limited to :test, :development, or :production.
Bundler.require(*Rails.groups)

module Hogehogeec
  class Application < Rails::Application

    config.to_prepare do
      # Load application's model / class decorators
      Dir.glob(File.join(File.dirname(__FILE__), "../app/**/*_decorator*.rb")) do |c|
        Rails.configuration.cache_classes ? require(c) : load(c)
      end

      # Load application's view overrides
      Dir.glob(File.join(File.dirname(__FILE__), "../app/overrides/*.rb")) do |c|
        Rails.configuration.cache_classes ? require(c) : load(c)
      end
    end

    # Settings in config/environments/* take precedence over those specified here.
    # Application configuration should go into files in config/initializers
    # -- all .rb files in that directory are automatically loaded.

    config.time_zone = 'Tokyo'
    config.generators.test_framework = :rspec
    config.generators.system_tests   = false
    config.generators.stylesheets    = false
    config.generators.javascripts    = false
    config.generators.helper         = false
    config.assets.initialize_on_precompile = false  #追加

    config.generators do |g|
      g.test_framework :rspec,
                      fixtures: false,
                      view_specs: false,
                      helper_specs: false,
                      routing_specs: false
    end
  end
end

##4.Gemfileの変更

変更前

gem 'mysql2', '>= 0.3.18', '< 0.5'

変更後

# mysqlを下記のようにdevelopment,test環境へ移動

group :development, :test do
 ・
 ・
 ・
 ・
  gem 'mysql2', '>= 0.3.18', '< 0.5'
end

# 追加
group :production do
  gem 'pg', "~> 0.19.0"
  gem 'rails_12factor'
end

bundle install --without production
git add -A
git commit -m "~~~"

##6.デプロイ

以下のコマンドを1つずつ実行します。

heroku login
heroku create
heroku pg:reset DATABASE
bundle exec rake assets:precompile
git push heroku master(pushするブランチがmasterでない場合→git push heroku ブランチ名:master)
# herokuアドオンにHeroku Postgresが追加されていない場合(herokuリポジトリページのoverviewのInstalled add-onsで確認)

heroku addons:create heroku-postgresql
heroku run rails db:migrate
heroku run rails g spree:install
heroku restart

##7.補足 CDNの読み込み(応急処置)

デプロイ後にfont-awesome(Facebookなどのアイコン)が読み込まれない場合はapplication.html.erb<head></head>内に以下のstylesheet_link_tagを追加してみてください。

layouts/_head.html.erb
<%= stylesheet_link_tag "application", 'https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.5.0/css/font-awesome.css', :media => "all" %>

##最後に
以上、説明不足の箇所もありますが、MySQL、solidusで運用されているRailsアプリケーションをherokuにデプロイできたのでまとめてみました。

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