Question

我遵循Rails教程（https://www.railstutorial.org/book/basic_login）生成示例Rails应用。但是，下拉菜单仅在开发模式下有效。在生产模式下，单击“帐户”不会发生任何反应。我尝试以下操作，仍然无法解决。谁能帮我吗？ 1）预编译资产 2）如有人提到的那样更改applicaiton.js中的引导程序和jquery顺序

这是_header.html.erb文件代码：

<header class="navbar navbar-fixed-top navbar-inverse">
  <div class="container">
    <%= link_to "sample app", root_path, id: "logo" %>
    <nav>
      <ul class="nav navbar-nav navbar-right">
        <li><%= link_to "Home", home_path %></li>
        <li><%= link_to "Help", help_path %></li>
        <% if logged_in? %>
          <li><%= link_to "Users", '#' %></li>
          <li class="dropdown">
            <a href="#" class="dropdown-toggle" data-toggle="dropdown">
              Account <b class="caret"></b>
            </a>
            <ul class="dropdown-menu">
              <li><%= link_to "Profile", current_user %></li>
              <li><%= link_to "Settings", '#' %></li>
              <li class="divider"></li>
              <li>
                <%= link_to "Log out", logout_path, method: :delete %>
              </li>
            </ul>
          </li>
        <% else %>
          <li><%=link_to "Log in", login_path %></li>
        <% end %>
      </ul>
    </nav>
  </div>
</header>

以下是我的资产/javascripts/application.js文件：

//= require jquery

//= require bootstrap

//= require activestorage

//= require turbolinks

//= require_tree .

这是我的gem文件：

source 'https://rubygems.org'
git_source(:github) { |repo| "https://github.com/#{repo}.git" }

ruby '2.5.1'

# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '~> 5.2.1'

# bootstrap
# gem 'bootstrap-sass'
gem 'bootstrap-sass', '~> 3.3.7'
# gem 'bootstrap', '~> 4.1.3'

# jquery
gem 'jquery-rails', '~>4.3'

# Use sqlite3 as the database for Active Record
# gem 'sqlite3'
# Use Puma as the app server
gem 'puma', '~> 3.11'
# Use SCSS for stylesheets
gem 'sass-rails', '~> 5.0'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# See https://github.com/rails/execjs#readme for more supported runtimes
gem 'duktape'
# Use CoffeeScript for .coffee assets and views
gem 'coffee-rails', '~> 4.2'
# Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
gem 'turbolinks', '~> 5'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.5'
# Use Redis adapter to run Action Cable in production
# gem 'redis', '~> 4.0'
# Use ActiveModel has_secure_password
gem 'bcrypt', '~> 3.1.7'

# Use ActiveStorage variant
# gem 'mini_magick', '~> 4.8'

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

# Reduces boot times through caching; required in config/boot.rb
gem 'bootsnap', '>= 1.1.0', require: false

group :development, :test do
  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
  gem 'sqlite3'
end

group :development do
  # Access an interactive console on exception pages or by calling 'console' anywhere in the code.
  gem 'web-console', '>= 3.3.0'
end

group :test do
  # Adds support for Capybara system testing and selenium driver
  gem 'capybara', '>= 2.15'
  gem 'selenium-webdriver'
  # Easy installation and use of chromedriver to run system tests with Chrome
  gem 'chromedriver-helper'

  gem 'minitest'
  gem 'minitest-reporters'

  gem 'rails-controller-testing'
end

group :production do
  gem 'pg'
end

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

Answer 1

您是否在开始生产实例之前尝试预编译资产？如果没有运行：

RAILS_ENV=production rake assets:clobber
RAILS_ENV=production rake assets:precompile

希望这会有所帮助。

Answer 2

我的Rails应用存在类似问题。看到这里：Javascript in a fresh Rails 5.2.1 app on Heroku doesn't work properly

问题是我从

更改了uglifier宝石

gem 'uglifier', '>= 1.3.0'

将几周前发布的4.1.18版本加载到

gem 'uglifier', '~> 3.0.4'

您应该更改

config.assets.debug = true

返回false，因为这将一个接一个地加载所有资产，而不是像在开发中那样在生产中最小化它们（在uglifier的帮助下）。该错误仅来自uglifier宝石以某种方式无法正常工作

编辑：

这些是我的application.js require语句：

//= require jquery
//= require rails-ujs
//= require activestorage
//= require bootstrap
//= require turbolinks
//= require_tree .

这是我的GemFile：

# frozen_string_literal: true

source 'https://rubygems.org'
git_source(:github) { |repo| "https://github.com/#{repo}.git" }

ruby '2.4.4'

gem 'coffee-rails', '~> 4.2'
gem 'jbuilder', '~> 2.5'
gem 'pg', '>= 0.18', '< 2.0'
gem 'puma', '~> 3.11'
gem 'rails', '~> 5.2.1'
gem 'sass-rails', '~> 5.0'
gem 'turbolinks', '~> 5'
gem 'uglifier', '~> 3.0.4'

gem 'bootsnap', '>= 1.1.0', require: false

gem 'bcrypt', '~> 3.1.7'
gem 'bootstrap-sass'
gem 'bootstrap-will_paginate'
gem 'faker'
gem 'friendly_id', '~> 5.2.0'
gem 'jquery-rails'
gem 'rails-i18n'
gem 'will_paginate'

group :development, :test do
  gem 'byebug', platforms: %i[mri mingw x64_mingw]
end

group :development do
  gem 'web-console', '>= 3.3.0'
  gem 'duktape'
end

group :test do
  gem 'capybara', '>= 2.15', '< 4.0'
  gem 'chromedriver-helper'
  gem 'rails-controller-testing'
  gem 'selenium-webdriver'
end

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

这是我目前正在为Web开发课程使用的应用程序：

Ruby on Rails Forum

我也将继续学习本教程，现在在Rails教程的password_reset步骤中，并且现在可以使用此设置...

轨道5.2.1 Ruby 2.4.4p296 Windows 10教育版

Bootstrap 3下拉菜单在生产模式Rails 5.2中不起作用

2 个答案: