将我的应用程序运行到生产环境，但javascript无法正常工作

Question

我是Ruby On Rails的新手，这是我第一次尝试在生产环境中运行我的应用程序。 但是我遇到了一些麻烦。

我有Ruby版本2.1.5和Rails版本4.2.3

我按照以下步骤将应用程序投入生产：

1. 我运行命令行rake db:create RAILS_ENV=production以创建与生产环境相关的数据库。

2. 我运行rake db:migrate RAILS_ENV=production运行迁移

3. 然后我用rake assets:precompile RAILS_ENV=production预编译了资产rake assets:precompile RAILS_ENV=production

我查看了我的公共目录，并找到了与所有预编译文件一起出现的资产目录。

当我在生产型rails s -e production启动我的应用程序时，除了JavaScript无效外，我已经完成了开发中的所有工作。

我试图在我的一个视图中插入警报，以查看我的JavaScript是否可以在生产环境中使用。 但是我没有戒备。 我在开发中启动了Web服务器，并且那里的警报起作用了。

<script type="text/javascript">

  alert("Bonjour");

</script>

看来我的javascript无法在生产环境中使用，为什么？ 我已经阅读了很多类似的问题，但是没有任何工作可以帮助我吗？

这是我的config/environments/production.rb文件：

Rails.application.configure do


  # Force all access to the app over SSL, use Strict-Transport-Security,
  # and use secure cookies.
  config.force_ssl = false
  # 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
  # Enable Rack::Cache to put a simple HTTP cache in front of your application
  # Add `rack-cache` to your Gemfile before enabling this.
  # For large-scale production use, consider using a caching reverse proxy like
  # NGINX, varnish or squid.
  # config.action_dispatch.rack_cache = true

  # Disable serving static files from the `/public` folder by default since
  # Apache or NGINX already handles this.
  config.serve_static_files = ENV['RAILS_SERVE_STATIC_FILES'].present?
  # 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 = true
  # config.assets.precompile =  ['*.js', '*.css', '*.css.erb'] 
  # config.assets.precompile += %w( *.css *.scss *.js )

  # Asset digests allow you to set far-future HTTP expiration dates on all assets,
  # yet still be able to expire them through the digest params.
  config.assets.digest = true

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

  # 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

  # 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 = [ :subdomain, :uuid ]

  # Use a different logger for distributed setups.
  # config.logger = ActiveSupport::TaggedLogging.new(SyslogLogger.new)

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

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

  # 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

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

这是我的GemFile：

source 'https://rubygems.org'


# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '4.2.3'
#To have charts on rails
gem 'chartkick'
#To read, write spreadsheets
gem 'spreadsheet', '~> 1.0.3'
#To import CSV file and spreadsheets
gem 'roo', '~> 2.1.0'
#To improve tables style
gem 'jquery-datatables-rails', '~> 3.3.0'
gem 'jquery-ui-rails'
#Pour qu'il fonctionne, le gem bcrypt doit être utilisé sous sa version 3.1.9
gem 'bcrypt', '~>3.1.7'

gem 'bootstrap-sass', '3.2.0.0'
# Use mysql as the database for Active Record
gem 'mysql2'
# Use SCSS for stylesheets
gem 'sass-rails', '~> 5.0'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# Use CoffeeScript for .coffee assets and views
gem 'coffee-rails', '~> 4.1.0'
# See https://github.com/rails/execjs#readme for more supported runtimes
# gem 'therubyracer', platforms: :ruby

# Use jquery as the JavaScript library
gem 'jquery-rails'
# Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks
#gem 'turbolinks'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.0'
# bundle exec rake doc:rails generates the API under doc/api.
gem 'sdoc', '~> 0.4.0', group: :doc

# Use ActiveModel has_secure_password
# gem 'bcrypt', '~> 3.1.7'

# Use Unicorn as the app server
# gem 'unicorn'

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

group :development, :test do
  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
  gem 'byebug'

  # Access an IRB console on exception pages or by using <%= console %> in views
  gem 'web-console', '~> 2.0'
end

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

我尝试添加以下行： config.assets.precompile += ['*.js', '*.css', '*.css.erb']但出现以下错误：

Sass::SyntaxError: Undefined variable: "$alert-padding"

我也尝试添加此行：

config.assets.precompile += %w( *.css *.scss *.js )

我仍然有同样的错误。

Answer 1

这个问题似乎可以解决类似（或相同）的问题

他们的解决方案是删除

gem 'jquery-ui-rails'

来自gemfile因为jquery-iu包含在jquery-rails gem中。

同时使用这两个宝石会引起冲突。