application.js未在開發中加載（未定義的ReferenceError：未定義$）

Question

上周，我正在啟動一個新的Ruby on Rails應用程序，該應用程序將在Rails 4中構建它，但是有很多麻煩，所以我卸載了rvm版本的rails

現在我的rails 3項目之一在加載資產時遇到了問題。 （其他都可以）

我已經卸載了所有紅寶石，並開始重新制作，除了我的資產外，一切都恢復了

Started GET "/assets/application.js?body=1" for 192.168.1.184 at 2015-03-09 14:14:22 -0500
2015-03-09 14:14:22 INFO -- Served asset /application.js - 304 Not Modified (0ms)
[2015-03-09 14:14:22] WARN  Could not determine content-length of response body. Set content-length of the response or set Response#chunked = true
[2015-03-09 14:14:22] WARN  Could not determine content-length of response body. Set content-length of the response or set Response#chunked = true
[2015-03-09 14:14:22] WARN  Could not determine content-length of response body. Set content-length of the response or set Response#chunked = true
[2015-03-09 14:14:22] WARN  Could not determine content-length of response body. Set content-length of the response or set Response#chunked = true
[2015-03-09 14:14:22] WARN  Could not determine content-length of response body. Set content-length of the response or set Response#chunked = true
2015-03-09 14:14:23 INFO -- 

控制台日志

Uncaught ReferenceError: $ is not defined

的application.js

//= require jquery
//= require jquery.geocomplete
//= require twitter/bootstrap
//= require autocomplete-rails
//= require jgrowl
//= require underscore
//= require gmaps/google
//= require rails.validations
//= require_tree .
//= require jquery_ujs
//= require jquery.ui.all
//= require amazingslider
//= require initslider-1
//= require dataTables/jquery.dataTables

的Gemfile

source 'https://rubygems.org'


group :development do
  gem "bullet", '~> 4.4.0'
  gem "spring"

  gem 'rails_best_practices'
end

group :test do

  gem 'selenium-webdriver' #used for capybara features where js => true
  gem 'rspec'
  gem 'rspec-rails'
  gem 'watchr'
  gem 'launchy'
  gem 'factory_girl_rails'
  gem 'shoulda-matchers'
  gem 'capybara', '2.2.0'
  gem 'database_cleaner'
  gem 'faker'
  gem 'guard-rspec'
  gem 'guard-spork'
  gem 'spork'
  gem 'resque_spec'
  #These are for mac only
  gem 'rb-fsevent'
  gem 'cucumber-rails', :require => false
end
group :production do
  gem 'god', '0.13.1'
  gem 'whenever'
  gem 'gauges-rails'

end

gem 'client_side_validations', '3.2.5'
gem 'tzip'
gem 'i18n'
gem 'json'
gem 'rails', '3.2.3'
gem 'rake', '0.9.2.2'
gem 'will_paginate', '3.0.4'
gem 'devise', "2.1.2"
gem 'devise-encryptable', "0.1.1"
gem 'cancan'
gem 'httparty'
# Bundle edge Rails instead:
# gem 'rails', :git => 'git://github.com/rails/rails.git'
gem 'pg', '0.15.1'
gem 'rgeo', '0.3.20'
gem 'activerecord-postgis-adapter', '0.6.3'
gem 'rgeo-geojson', '0.2.3'
gem 'rgeo-activerecord', '0.5.0'

# Gems used only for assets and not required
# in production environments by default.
gem 'twitter-bootstrap-rails', '~> 2.2.8'

gem 'rails3-jquery-autocomplete'
gem 'twitter_bootstrap_form_for'
gem 'sass-rails',   '~> 3.2.3'
gem 'coffee-rails', '~> 3.2.1'

gem 'will_paginate-bootstrap', '0.2.2'
gem 'haml'
gem 'less-rails'

# only Jquery
gem 'jquery-rails', '~> 2.1.3'
#---added----
gem 'jquery-ui-themes'
gem 'jquery-ui-rails'



gem 'mechanize'
gem 'chronic', '~>0.7.0'
gem 'resque', '~> 1.21.0', :require => 'resque/server'
gem 'redis', '3.0.1'
gem 'ruby-gmail'
gem 'mime'
gem 'roo'
gem 'pony'
#dont think we even need Mysql2 Gem since using postgres
#gem 'mysql2'
# See https://github.com/sstephenson/execjs#readme for more supported runtimes
gem 'uglifier', '>= 1.0.3'

# To use ActiveModel has_secure_password
gem 'bcrypt-ruby', '~> 3.0.0'

# To use Jbuilder templates for JSON
# gem 'jbuilder'

# Deploy with Capistrano
gem 'capistrano', '2.14.2'
# To use debugger
# gem 'ruby-debug19', :require => 'ruby-debug'

#Austin Added new relic gem for newrelic.com monitoring of transactions and database'
#gem 'newrelic_rpm'

#gems for paypal sdk
gem 'paypal-sdk-rest'
gem 'paypal-sdk-merchant'
gem 'paypal-recurring'

gem 'credit_card_validations'

#PDF Generation of invoices
gem 'prawn'
gem 'levenshtein'
gem 'jquery-datatables-rails', github: 'rweng/jquery-datatables-rails'
platforms :ruby do
  group :development do

    #Austin added better errors for development display of errors
    gem 'better_errors'

    #Austin added binding of caller for development in order to enable REPL and local instance variable inspection of variables on errors
    gem 'binding_of_caller'
  end

  # Use unicorn as the app server

  gem 'therubyracer', '~> 0.10.2'
  gem 'unicorn', '~> 4.6.2'
  gem 'libv8', '3.3.10.4'
  gem 'iconv'
end
gem 'recurly', '2.1.8'
gem 'sitemap_generator'
gem 'google-analytics-rails'
gem 'gmaps4rails'
gem 'feedjira'

Answer 1

根據此類問題的性質，我無法為您解決此問題，但是我可以為您提供一些清單，以驗證很有可能是問題的根源。

• 可能的情況是，腳本標簽包含在加載application.js文件之前的jQuery調用。 檢入正在加載的application.js所在的HTML（包括模板），並確認是否已對$進行任何調用
• 另一種情況是，您正在加載多個清單，而另一個清單正在調用jQuery，並且也加載在application.js之前。 在您的HTML文件中進行檢查。