我遇到的问题与SO帖子所概述的基本相同：
jQuery script not loading on production (Heroku - cedar stack)
在开发环境中，我的javascript正确内置于页面中：
<link type="text/css" rel="stylesheet" media="all" href="/assets/rails_admin/imports.css?body=1">
<link type="text/css" rel="stylesheet" media="all" href="/assets/rails_admin/rails_admin.css?body=1">
<script type="text/javascript" src="/assets/jquery.js?body=1">
<script type="text/javascript" src="/assets/jquery_ujs.js?body=1">
<script type="text/javascript" src="/assets/jquery.iframe-transport.js?body=1">
<script type="text/javascript" src="/assets/jquery.remotipart.js?body=1">
<script type="text/javascript" src="/assets/jquery.ui.effect.js?body=1">
<script type="text/javascript" src="/assets/jquery.ui.core.js?body=1">
<script type="text/javascript" src="/assets/jquery.ui.widget.js?body=1">
<script type="text/javascript" src="/assets/jquery.ui.mouse.js?body=1">
<script type="text/javascript" src="/assets/jquery.ui.sortable.js?body=1">
<script type="text/javascript" src="/assets/jquery.ui.position.js?body=1">
<script type="text/javascript" src="/assets/jquery.ui.menu.js?body=1">
<script type="text/javascript" src="/assets/jquery.ui.autocomplete.js?body=1">
<script type="text/javascript" src="/assets/jquery.ui.datepicker.js?body=1">
<script type="text/javascript" src="/assets/rails_admin/jquery.ui.timepicker.js?body=1">
<script type="text/javascript" src="/assets/rails_admin/ra.datetimepicker.js?body=1">
<script type="text/javascript" src="/assets/rails_admin/jquery.colorpicker.js?body=1">
<script type="text/javascript" src="/assets/rails_admin/ra.filter-box.js?body=1">
<script type="text/javascript" src="/assets/rails_admin/ra.filtering-multiselect.js?body=1">
<script type="text/javascript" src="/assets/rails_admin/ra.filtering-select.js?body=1">
<script type="text/javascript" src="/assets/rails_admin/ra.remote-form.js?body=1">
<script type="text/javascript" src="/assets/rails_admin/jquery.pjax.js?body=1">
<script type="text/javascript" src="/assets/jquery_nested_form.js?body=1">
<script type="text/javascript" src="/assets/rails_admin/ra.nested-form-hooks.js?body=1">
<script type="text/javascript" src="/assets/bootstrap-transition.js?body=1">
<script type="text/javascript" src="/assets/bootstrap-affix.js?body=1">
<script type="text/javascript" src="/assets/bootstrap-alert.js?body=1">
<script type="text/javascript" src="/assets/bootstrap-button.js?body=1">
<script type="text/javascript" src="/assets/bootstrap-carousel.js?body=1">
<script type="text/javascript" src="/assets/bootstrap-collapse.js?body=1">
<script type="text/javascript" src="/assets/bootstrap-dropdown.js?body=1">
<script type="text/javascript" src="/assets/bootstrap-modal.js?body=1">
<script type="text/javascript" src="/assets/bootstrap-scrollspy.js?body=1">
<script type="text/javascript" src="/assets/bootstrap-tab.js?body=1">
<script type="text/javascript" src="/assets/bootstrap-tooltip.js?body=1">
<script type="text/javascript" src="/assets/bootstrap-popover.js?body=1">
<script type="text/javascript" src="/assets/bootstrap-typeahead.js?body=1">
<script type="text/javascript" src="/assets/bootstrap.js?body=1">
<script type="text/javascript" src="/assets/rails_admin/ra.widgets.js?body=1">
<script type="text/javascript" src="/assets/rails_admin/ui.js?body=1">
<script type="text/javascript" src="/assets/rails_admin/themes/default/ui.js?body=1">
<script type="text/javascript" src="/assets/rails_admin/custom/ui.js?body=1">
<script type="text/javascript" src="/assets/rails_admin/rails_admin.js?body=1">
但是在Heroku（Cedar堆栈）的生产中，它看起来像：
<html>
<head>
<meta content='text/html; charset=utf-8' http-equiv='Content-Type'>
<meta content='NONE,NOARCHIVE' name='robots'>
<meta content="authenticity_token" name="csrf-param" />
<meta content="mJAzj+IxBGxFd4vVR9EZKX9a0CL9zSugp5a13vcCOGY=" name="csrf-token" />
<link href="/assets/rails_admin/rails_admin-babb206bf505b710a7e6ec10b27d3190.css" media="all" rel="stylesheet" type="text/css" />
<script src="/assets/rails_admin/rails_admin-315877c5aae48e12a1abd274be846d08.js" type="text/javascript"></script>
</head>
根据我的研究，每个人似乎都指出预编译资产是一个解决方案，但我已经尝试了几十个解决方案，但没有一个解决了这个问题。
我尝试使用以下命令推送到Heroku之前预编译资产：
RAILS_ENV=production bundle exec rake assets:precompile
但问题仍然存在
以下是一些相关文件：
的Gemfile：
source 'https://rubygems.org'
gem 'rails', '3.2.11'
# Bundle edge Rails instead:
# gem 'rails', :git => 'git://github.com/rails/rails.git'
gem 'pg'
gem 'rails_admin'
gem 'cancan'
gem 'bootstrap-sass'
gem 'jquery-rails'
gem "devise"
group :development, :test do
gem 'rspec-rails'
end
# Gems used only for assets and not required
# in production environments by default.
group :assets do
gem 'sass-rails', '~> 3.2.3'
gem 'coffee-rails', '~> 3.2.1'
gem 'uglifier', '>= 1.0.3'
gem 'bootstrap-rails'
end
的application.js
// This is a manifest file that'll be compiled into application.js, which will include all the files
// listed below.
//
// Any JavaScript/Coffee file within this directory, lib/assets/javascripts, vendor/assets/javascripts,
// or vendor/assets/javascripts of plugins, if any, can be referenced here using a relative path.
//
// It's not advisable to add code directly here, but if you do, it'll appear at the bottom of the
// the compiled file.
//
// WARNING: THE FIRST BLANK LINE MARKS THE END OF WHAT'S TO BE PROCESSED, ANY BLANK LINE SHOULD
// GO AFTER THE REQUIRES BELOW.
//
//= require jquery
//= require jquery_ujs
//= require_tree .
application.rb中
require File.expand_path('../boot', __FILE__)
require 'rails/all'
if defined?(Bundler)
# If you precompile assets before deploying to production, use this line
Bundler.require(*Rails.groups(:assets => %w(development test)))
# If you want your assets lazily compiled in production, use this line
# Bundler.require(:default, :assets, Rails.env)
end
module MaterialsCalculatorApp
class Application < Rails::Application
# 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.
# Custom directories with classes and modules you want to be autoloadable.
# config.autoload_paths += %W(#{config.root}/extras)
# Only load the plugins named here, in the order given (default is alphabetical).
# :all can be used as a placeholder for all plugins not explicitly named.
# config.plugins = [ :exception_notification, :ssl_requirement, :all ]
# Activate observers that should always be running.
# config.active_record.observers = :cacher, :garbage_collector, :forum_observer
# Set Time.zone default to the specified zone and make Active Record auto-convert to this zone.
# Run "rake -D time" for a list of tasks for finding time zone names. Default is UTC.
# config.time_zone = 'Central Time (US & Canada)'
# The default locale is :en and all translations from config/locales/*.rb,yml are auto loaded.
# config.i18n.load_path += Dir[Rails.root.join('my', 'locales', '*.{rb,yml}').to_s]
# config.i18n.default_locale = :de
# Configure the default encoding used in templates for Ruby 1.9.
config.encoding = "utf-8"
# Configure sensitive parameters which will be filtered from the log file.
config.filter_parameters += [:password]
# Enable escaping HTML in JSON.
config.active_support.escape_html_entities_in_json = true
# Use SQL instead of Active Record's schema dumper when creating the database.
# This is necessary if your schema can't be completely dumped by the schema dumper,
# like if you have constraints or database-specific column types
# config.active_record.schema_format = :sql
# Enforce whitelist mode for mass assignment.
# This will create an empty whitelist of attributes available for mass-assignment for all models
# in your app. As such, your models will need to explicitly whitelist or blacklist accessible
# parameters by using an attr_accessible or attr_protected declaration.
config.active_record.whitelist_attributes = true
# Enable the asset pipeline
config.assets.enabled = true
# Version of your assets, change this if you want to expire all your assets
config.assets.version = '1.0'
config.assets.initialize_on_precompile = false
end
end
在开发过程中一切正常，它只是部署到Heroku，我发现问题。如果有任何其他文件可能有助于调试此问题，请告诉我，我会提供。
答案 0 :(得分：4)
我最初认为这是与Heroku特别相关的事情。但是，似乎我发现了这个问题。 Twitter Bootstrap似乎无法与rails_admin一起播放，我能够将以下文件添加到app/assets/javascripts/rails_admin
rails_admin.js
//= require 'jquery'
//= require 'jquery_ujs'
//= require 'jquery.ui.effect'
//= require 'jquery.ui.sortable'
//= require 'jquery.ui.autocomplete'
//= require 'jquery.ui.datepicker'
//= require 'rails_admin/jquery.ui.timepicker'
//= require 'rails_admin/ra.datetimepicker'
//= require 'rails_admin/jquery.colorpicker'
//= require 'rails_admin/ra.filter-box'
//= require 'rails_admin/ra.filtering-multiselect'
//= require 'rails_admin/ra.filtering-select'
//= require 'rails_admin/ra.remote-form'
//= require 'rails_admin/jquery.pjax'
//= require 'jquery_nested_form'
//= require 'rails_admin/ra.nested-form-hooks'
//= require 'twitter/bootstrap'
//= require 'rails_admin/ra.widgets'
//= require 'rails_admin/ui'
//= require 'rails_admin/custom/ui'
我还将此行添加到application.rb
config.assets.precompile += ['rails_admin/rails_admin.css', 'rails_admin/rails_admin.js']
我所有的js下拉列表现在似乎都在运作。