Goal: Using my rails app with static images in assets in production environemt
Steps:
RAILS_ENV=production rails assets:precompile
RAILS_SERVE_STATIC_FILES
environemt variable to true
to enable public file server (in production.rb
- config.public_file_server.enabled = ENV['RAILS_SERVE_STATIC_FILES'].present?
config.serve_static_assets = true
to
/config/application.rb
With this setup, I`ve started the server.
I have a few static images in /app/assets/images/
which precompiled versions with fingerprint filename are now in /public/assets
. Examples:
aussen-d2fb0029a12281121a1752c599e715a8e2b3db17f1e8e18248a79a7b1ca63b91.jpg
hintergrund-ca80e1ae5a697c86898f3a7e107694a76dc12e54320b8ac80c58eecbffe0414a.png
So far so great.
When I use background-image: url(<%= asset_path('hintergrund') %>);
in application.css.erb
it successfully loads the precompiled background-image from /public/assets
.
Problem: I can't access the precompiled images with my image_tags in the views! Example:
<%= image_tag("aussen") %>
Error Logs:
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
After hours of researching, I still don't get why I can access the precompiled image in the stylesheet, but not in the view with the image_tag.
Additional information:
$ 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 )
The asset "aussen" is not present in the asset pipeline.
Technically true because you have not aussen
but you have aussen.jpg
so it will be <%= image_tag("aussen.jpg") %>
Look, while you use <%= image_tag("aussen") %>
then it will be genarate HTML like this
<%= image_tag("aussen") %>
#=> <img alt="Aussen" src="/assets/aussen" />
While you use <%= image_tag("aussen.jpg") %>
then it will be genarate HTML like this
<%= image_tag("aussen.jpg") %>
#=> <img alt="Aussen" src="/assets/aussen.jpg" />
When it's going into production mode then it will be shown some encrypted key on the page source like this
aussen-d2fb0029a12281121a1752c599e715a8e2b3db17f1e8e18248a79a7b1ca63b91.jpg
image_tag
AssetTagHelper
see this for reference.
Update production.rb
file config.assets.compile
false
to true
# config/environments/production.rb
...
config.assets.compile = true
...