Rails6.0 | 民泊サイトの構築（改良版）| 22 | AmazonS3| for MacOSX - 学生向けプログラミング入門

| 21 | 複数の写真をアップロード　<<　 [ホーム]　>>　| 23 | アクションテキスト

herokuにアプリケーションをデプロイすると画像をローカルに保存することができません。
それに対応するため、アップロードした画像を全てアマゾンS3に保存するよう設定します。

アマゾンS3のキーの取得方法は以下の手順でお願いします。
mrradiology.hatenablog.jp

GemFileに以下の記述を追加して下さい。

記述追加　GemFile(67行目)

gem "aws-sdk"

GemFile

source 'https://rubygems.org'
git_source(:github) { |repo| "https://github.com/#{repo}.git" }

ruby '2.6.3'

# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '~> 6.0.3'
# Use postgresql as the database for Active Record
gem 'pg', '>= 0.18', '< 2.0'
# Use Puma as the app server
gem 'puma', '~> 4.1'
# Use SCSS for stylesheets
gem 'sass-rails', '>= 6'
# Transpile app-like JavaScript. Read more: https://github.com/rails/webpacker
gem 'webpacker', '~> 4.0'
# Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
gem 'turbolinks', '~> 5'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.7'
# Use Redis adapter to run Action Cable in production
# gem 'redis', '~> 4.0'
# Use Active Model has_secure_password
# gem 'bcrypt', '~> 3.1.7'

# Use Active Storage variant
# gem 'image_processing', '~> 1.2'

# Reduces boot times through caching; required in config/boot.rb
gem 'bootsnap', '>= 1.4.2', require: false

group :development, :test do
  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
end

group :development do
  # Access an interactive console on exception pages or by calling 'console' anywhere in the code.
  gem 'web-console', '>= 3.3.0'
  gem 'listen', '~> 3.2'
  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
  gem 'spring'
  gem 'spring-watcher-listen', '~> 2.0.0'
end

group :test do
  # Adds support for Capybara system testing and selenium driver
  gem 'capybara', '>= 2.15'
  gem 'selenium-webdriver'
  # Easy installation and use of web drivers to run system tests with browsers
  gem 'webdrivers'
end

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

# Bulma
gem 'bulma-rails', '~> 0.7.4'
gem 'bulma-extensions-rails', '~> 1.0.30'

#デバイス
gem 'devise'

# 日本語化
gem 'rails-i18n'

# アマゾンS3
gem "aws-sdk"

コマンド
bundle

「config\environments\development.rb」ファイルの記述を更新します。

記述更新　config\environments\development.rb
32行目の「config.active_storage.service = :local」の記述を「:amazon」に変更します。

  # config.active_storage.service = :local
  config.active_storage.service = :amazon

config\environments\development.rb

Rails.application.configure do
  # Settings specified here will take precedence over those in config/application.rb.

  # In the development environment your application's code is reloaded on
  # every request. This slows down response time but is perfect for development
  # since you don't have to restart the web server when you make code changes.
  config.cache_classes = false

  # Do not eager load code on boot.
  config.eager_load = false

  # Show full error reports.
  config.consider_all_requests_local = true

  # Enable/disable caching. By default caching is disabled.
  # Run rails dev:cache to toggle caching.
  if Rails.root.join('tmp', 'caching-dev.txt').exist?
    config.action_controller.perform_caching = true
    config.action_controller.enable_fragment_cache_logging = true

    config.cache_store = :memory_store
    config.public_file_server.headers = {
      'Cache-Control' => "public, max-age=#{2.days.to_i}"
    }
  else
    config.action_controller.perform_caching = false

    config.cache_store = :null_store
  end

  # Store uploaded files on the local file system (see config/storage.yml for options).
  # config.active_storage.service = :local
  config.active_storage.service = :amazon

  # Don't care if the mailer can't send.
  config.action_mailer.raise_delivery_errors = true

  config.action_mailer.perform_caching = false

  # Print deprecation notices to the Rails logger.
  config.active_support.deprecation = :log

  # Raise an error on page load if there are pending migrations.
  config.active_record.migration_error = :page_load

  # Highlight code that triggered database queries in logs.
  config.active_record.verbose_query_logs = true

  # Debug mode disables concatenation and preprocessing of assets.
  # This option may cause significant delays in view rendering with a large
  # number of complex assets.
  config.assets.debug = true

  # Suppress logger output for asset requests.
  config.assets.quiet = true

  # Raises error for missing translations.
  # config.action_view.raise_on_missing_translations = true

  # Use an evented file watcher to asynchronously detect changes in source code,
  # routes, locales, etc. This feature depends on the listen gem.
  # config.file_watcher = ActiveSupport::EventedFileUpdateChecker

  # デバイスのメール設定
  config.action_mailer.default_url_options = { host: 'localhost', port: 3000 }

  #Gメールの設定
  config.action_mailer.delivery_method = :smtp
  
  config.action_mailer.smtp_settings = {
    address: "smtp.gmail.com",
    port: 587,
    enable_starttls_auto: true,
    authentication: "plain",
    user_name: 'win.rails.learn@gmail.com',
    password: 'ご自分のgmailパスワードを入れてください。'
  }

end

「config\storage.yml」ファイルに以下の記述を追加します。

記述追加　config\storage.yml(9行目)
アクセスキー、シークレットキー、バケット名はご自分のものを入れて下さい。

amazon:
  service: S3
  access_key_id: 'ご自分のアクセスキーを入れてください。'
  secret_access_key: 'ご自分のシークレットアクセスキーを入れてください。'
  region: "ap-northeast-1"
  bucket: "ご自分のバケット名を入れてください。"

config\storage.yml

test:
  service: Disk
  root: <%= Rails.root.join("tmp/storage") %>

local:
  service: Disk
  root: <%= Rails.root.join("storage") %>

amazon:
  service: S3
  access_key_id: 'ご自分のアクセスキーを入れてください。'
  secret_access_key: 'ご自分のシークレットアクセスキーを入れてください。'
  region: "ap-northeast-1"
  bucket: "ご自分のバケット名を入れてください。"

# Use rails credentials:edit to set the AWS secrets (as aws:access_key_id|secret_access_key)
# amazon:
#   service: S3
#   access_key_id: <%= Rails.application.credentials.dig(:aws, :access_key_id) %>
#   secret_access_key: <%= Rails.application.credentials.dig(:aws, :secret_access_key) %>
#   region: us-east-1
#   bucket: your_own_bucket

# Remember not to checkin your GCS keyfile to a repository
# google:
#   service: GCS
#   project: your_project
#   credentials: <%= Rails.root.join("path/to/gcs.keyfile") %>
#   bucket: your_own_bucket

# Use rails credentials:edit to set the Azure Storage secret (as azure_storage:storage_access_key)
# microsoft:
#   service: AzureStorage
#   storage_account_name: your_account_name
#   storage_access_key: <%= Rails.application.credentials.dig(:azure_storage, :storage_access_key) %>
#   container: your_container_name

# mirror:
#   service: Mirror
#   primary: local
#   mirrors: [ amazon, google, microsoft ]