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Rails-image_tagを使用する場合、アセットはアセットパイプラインに存在しません

目標：my Rails本番環境のアセットの静的画像でアプリを使用する

手順：

  1. Railsアプリを本番環境に切り替えました。
  2. _Rails_ENV=production Rails assets:precompile_でアセットをプリコンパイルしました
  3. _Rails_SERVE_STATIC_FILES_ environemt変数をtrueに設定して、パブリックファイルサーバーを有効にします（_production.rb_-_config.public_file_server.enabled = ENV['Rails_SERVE_STATIC_FILES'].present?_
  4. 行_config.serve_static_assets = true_を_/config/application.rb_に追加しました

このセットアップで、サーバーを起動しました。

_/app/assets/images/_にいくつかの静的画像がありますが、指紋ファイル名を使用してプリコンパイルされたバージョンは_/public/assets_になりました。例：

  • _aussen-d2fb0029a12281121a1752c599e715a8e2b3db17f1e8e18248a79a7b1ca63b91.jpg_
  • _hintergrund-ca80e1ae5a697c86898f3a7e107694a76dc12e54320b8ac80c58eecbffe0414a.png_

これまでのところ素晴らしい。

_application.css.erb_でbackground-image: url(<%= asset_path('hintergrund') %>);を使用すると、_/public/assets_からプリコンパイルされた背景画像が正常にロードされます。

問題：ビューのimage_tagsでプリコンパイルされた画像にアクセスできません！例：

_<%= image_tag("aussen") %>
_

エラーログ：

_I, [2018-03-23T00:46:29.133381 #9289]  INFO -- : [f36ff000-6261-4c2c-bfcc-4a2f80cae682] Started GET "/" for 46.142.136.81 at 2018-03-23 00:46:29 +0100
I, [2018-03-23T00:46:29.134466 #9289]  INFO -- : [f36ff000-6261-4c2c-bfcc-4a2f80cae682] Processing by HomeController#index as HTML
I, [2018-03-23T00:46:29.136604 #9289]  INFO -- : [f36ff000-6261-4c2c-bfcc-4a2f80cae682]   Rendering home/index.html.erb within layouts/application
I, [2018-03-23T00:46:29.138267 #9289]  INFO -- : [f36ff000-6261-4c2c-bfcc-4a2f80cae682]   Rendered home/index.html.erb within layouts/application (1.5ms)
I, [2018-03-23T00:46:29.138482 #9289]  INFO -- : [f36ff000-6261-4c2c-bfcc-4a2f80cae682] Completed 500 Internal Server Error in 4ms
F, [2018-03-23T00:46:29.139546 #9289] FATAL -- : [f36ff000-6261-4c2c-bfcc-4a2f80cae682]
F, [2018-03-23T00:46:29.139635 #9289] FATAL -- : [f36ff000-6261-4c2c-bfcc-4a2f80cae682] ActionView::Template::Error (The asset "aussen" is not present in the asset pipeline.):
F, [2018-03-23T00:46:29.139798 #9289] FATAL -- : [f36ff000-6261-4c2c-bfcc-4a2f80cae682]     1: <%= image_tag("aussen", id: "home-img", alt: "Aussenansicht von Simson-Seelig") %>
[f36ff000-6261-4c2c-bfcc-4a2f80cae682]     2: <div id="home" class="content">
[f36ff000-6261-4c2c-bfcc-4a2f80cae682]     3:   <p>Alles für Simson von Simson-Seelig.</p>
[f36ff000-6261-4c2c-bfcc-4a2f80cae682]     4:   <p>Für die legendären Schwalben und alle anderen SIMSON-Modelle bieten wir Ersatzteile und Service. </p>
F, [2018-03-23T00:46:29.139867 #9289] FATAL -- : [f36ff000-6261-4c2c-bfcc-4a2f80cae682]
F, [2018-03-23T00:46:29.139930 #9289] FATAL -- : [f36ff000-6261-4c2c-bfcc-4a2f80cae682] app/views/home/index.html.erb:1:in `_app_views_home_index_html_erb__177499641769
_

数時間の調査の後、スタイルシートでプリコンパイルされたイメージにアクセスできる理由がまだわかりませんが、image_tagのビューではアクセスできません。

追加情報：

_$ Ruby --version
Ruby 2.4.3p205 (2017-12-14 revision 61247) [x86_64-linux]

$ Rails --version
Rails 5.1.4
_

_/config/application.rb_：

_require_relative 'boot'

require 'Rails/all'

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

module SimsonSeelig
  class Application < Rails::Application
    # Initialize configuration defaults for originally generated Rails version.
    config.load_defaults 5.1

    # 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.

    # Enable Rails to serve my assets
    config.serve_static_assets = true
  end
end
_

_production.rb_：

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

  # Code is not reloaded between requests.
  config.cache_classes = true

  # Eager load code on boot. This eager loads most of Rails and
  # your application in memory, allowing both threaded web servers
  # and those relying on copy on write to perform better.
  # Rake tasks automatically ignore this option for performance.
  config.eager_load = true

  # Full error reports are disabled and caching is turned on.
  config.consider_all_requests_local       = false
  config.action_controller.perform_caching = true

  # Attempt to read encrypted secrets from `config/secrets.yml.enc`.
  # Requires an encryption key in `ENV["Rails_MASTER_KEY"]` or
  # `config/secrets.yml.key`.
  config.read_encrypted_secrets = true

  # Disable serving static files from the `/public` folder by default since
  # Apache or NGINX already handles this.
  config.public_file_server.enabled = ENV['Rails_SERVE_STATIC_FILES'].present?

  if ENV["Rails_LOG_TO_STDOUT"].present?
    logger           = ActiveSupport::Logger.new(STDOUT)
    logger.formatter = config.log_formatter
    config.logger = ActiveSupport::TaggedLogging.new(logger)
  end

  # Compress JavaScripts and CSS.
  config.assets.js_compressor = :uglifier
  # config.assets.css_compressor = :sass

  # Do not fallback to assets pipeline if a precompiled asset is missed.
  config.assets.compile = false

  # `config.assets.precompile` and `config.assets.version` have moved to config/initializers/assets.rb

  # Enable serving of images, stylesheets, and JavaScripts from an asset server.
  # config.action_controller.asset_Host = 'http://assets.example.com'

  # Specifies the header that your server uses for sending files.
  # config.action_dispatch.x_sendfile_header = 'X-Sendfile' # for Apache
  # config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for NGINX

  # Mount Action Cable outside main process or domain
  # config.action_cable.mount_path = nil
  # config.action_cable.url = 'wss://example.com/cable'
  # config.action_cable.allowed_request_origins = [ 'http://example.com', /http:\/\/example.*/ ]

  # Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
  # config.force_ssl = true

  # Use the lowest log level to ensure availability of diagnostic information
  # when problems arise.
  config.log_level = :debug

  # Prepend all log lines with the following tags.
  config.log_tags = [ :request_id ]

  # Use a different cache store in production.
  # config.cache_store = :mem_cache_store

  # Use a real queuing backend for Active Job (and separate queues per environment)
  # config.active_job.queue_adapter     = :resque
  # config.active_job.queue_name_prefix = "simson-seelig_#{Rails.env}"
  config.action_mailer.perform_caching = false

  # Ignore bad email addresses and do not raise email delivery errors.
  # Set this to true and configure the email server for immediate delivery to raise delivery errors.
  # config.action_mailer.raise_delivery_errors = false

  # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
  # the I18n.default_locale when a translation cannot be found).
  config.i18n.fallbacks = true

  # Send deprecation notices to registered listeners.
  config.active_support.deprecation = :notify

  # Use default logging formatter so that PID and timestamp are not suppressed.
  config.log_formatter = ::Logger::Formatter.new

  # Use a different logger for distributed setups.
  # require 'syslog/logger'
  # config.logger = ActiveSupport::TaggedLogging.new(Syslog::Logger.new 'app-name')

  if ENV["Rails_LOG_TO_STDOUT"].present?
    logger           = ActiveSupport::Logger.new(STDOUT)
    logger.formatter = config.log_formatter
    config.logger    = ActiveSupport::TaggedLogging.new(logger)
  end

  # Do not dump schema after migrations.
  config.active_record.dump_schema_after_migration = false
end
_

_/config/initializers/assets.rb_：

_# Be sure to restart your server when you modify this file.

# Version of your assets, change this if you want to expire all your assets.
Rails.application.config.assets.version = '1.0'

# Add additional assets to the asset load path.
# Rails.application.config.assets.paths << Emoji.images_path
# Add Yarn node_modules folder to the asset load path.
Rails.application.config.assets.paths << Rails.root.join('node_modules')

# Precompile additional assets.
# application.js, application.css, and all non-JS/CSS in the app/assets
# folder are already added.
# Rails.application.config.assets.precompile += %w( admin.js admin.css )
_
ruby-on-railsasset-pipelineproduction-environment
6
Vega180

資産「aussen」は資産パイプラインに存在しません。

aussenがなくても_aussen.jpg_があり、<%= image_tag("aussen.jpg") %>になるため、技術的には正しい

<%= image_tag("aussen") %>を使用すると、次のようなHTMLが生成されます

_<%= image_tag("aussen") %>
#=> <img alt="Aussen" src="/assets/aussen" />
_

<%= image_tag("aussen.jpg") %>を使用すると、次のようなHTMLが生成されます

_<%= image_tag("aussen.jpg") %>
#=> <img alt="Aussen" src="/assets/aussen.jpg" />
_

本番モードに入ると、ページソースに次のような暗号化されたキーが表示されます

_aussen-d2fb0029a12281121a1752c599e715a8e2b3db17f1e8e18248a79a7b1ca63b91.jpg
_

_image_tag_AssetTagHelper 参照用にこれを参照してください。

_production.rb_ファイル_config.assets.compile_ falseをtrueに更新します

_# config/environments/production.rb
...
config.assets.compile = true
...
_
13
fool-dev

本番環境でconfig.assets.compile = trueを設定するかどうかわからない場合、サーバーの速度が低下します

config.assets.compile = true in Rails production、why not ??

Config.assets.compile = falseを明示的に設定する代わりに。私のために働いたことをコメントアウトしてください、これはおそらくバグです。これをコメントアウトした後、プリコンパイルされたアセットパイプラインを使用して画像が正しくレンダリングされました。

# config.assets.compile = false
4
Philippe Van Nuijs