Devise - Bootstrap - RoR：Sprockets :: Rails :: Helper :: AssetNotFound in Devise :: Sessions＃new

Question

我今天需要你的帮助，我在尝试使用devise安装Bootstrap时遇到了一个奇怪的错误。我一直在寻找网络，但我似乎无法找到我的问题的正确答案...如果有一个解决方案（真的搜索承诺！），那么我很抱歉这篇文章。这是错误消息：

Showing /PATH/app/views/layouts/application.html.erb where line #14 raised:

The asset "apple-touch-icon-144x144-precomposed.png" is not present in the asset pipeline.
Extracted source (around line #14):

    <!-- For third-generation iPad with high-resolution Retina display: -->
    <!-- Size should be 144 x 144 pixels -->
    <%= favicon_link_tag 'apple-touch-icon-144x144-precomposed.png', :rel => 'apple-touch-icon-precomposed', :type => 'image/png', :sizes => '144x144' %>

    <!-- For iPhone with high-resolution Retina display: -->
    <!-- Size should be 114 x 114 pixels -->

Rails.root: /PATH

直到现在我在项目中创建它，添加Devise，然后尝试安装gem'trip-bootstrap-rails'并应用布局但是我得到了这个错误。 这是我的github的链接：https://github.com/Ardzii/finance-tracker

以下是我编辑过的文件：

宝石文件：

source 'https://rubygems.org'

git_source(:github) do |repo_name|
  repo_name = "#{repo_name}/#{repo_name}" unless repo_name.include?("/")
  "https://github.com/#{repo_name}.git"
end


# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '~> 5.1.1'
gem 'devise'
gem 'twitter-bootstrap-rails'
gem 'devise-bootstrap-views'
gem 'sprockets-rails', :require => 'sprockets/railtie'
gem 'jquery-rails'
# Use Puma as the app server
gem 'puma', '~> 3.7'
# 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 'therubyracer', platforms: :ruby

# 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', '~> 3.0'
# Use ActiveModel has_secure_password
# gem 'bcrypt', '~> 3.1.7'

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

group :development, :test do
  gem 'sqlite3'
  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
  # Adds support for Capybara system testing and selenium driver
  gem 'capybara', '~> 2.13'
  gem 'selenium-webdriver'
end

group :development do
  # Access an IRB console on exception pages or by using <%= console %> anywhere in the code.
  gem 'web-console', '>= 3.3.0'
  gem 'listen', '>= 3.0.5', '< 3.2'
  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
  gem 'spring'
  gem 'spring-watcher-listen', '~> 2.0.0'
end

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

group :production do
  gem 'pg'
  gem 'rails_12factor'
end

application.css：

/*
 * This is a manifest file that'll be compiled into application.css, which will include all the files
 * listed below.
 *
 * Any CSS and SCSS file within this directory, lib/assets/stylesheets, or any plugin's
 * vendor/assets/stylesheets directory can be referenced here using a relative path.
 *
 * You're free to add application-wide styles to this file and they'll appear at the bottom of the
 * compiled file so the styles you add here take precedence over styles defined in any other CSS/SCSS
 * files in this directory. Styles in this file should be added after the last require_* statement.
 * It is generally better to create a new file per style scope.
 *
 *= require devise_bootstrap_views
 *= require_tree .
 *= require_self
 */

路由文件：

Rails.application.routes.draw do
  devise_for :users
  # For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
  root 'welcome#index'
end

在终端我做了：

$rails g bootstrap:install static
$rails g bootstrap:layout application
and overrode the application.html.erb
$rails g devise:views:locale en
$rails g devise:views:bootstrap_templates

*****编辑：添加application.html.erb文件（由Bootstrap生成）*******

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=Edge,chrome=1">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title><%= content_for?(:title) ? yield(:title) : "FinanceTracker" %></title>
    <%= csrf_meta_tags %>

    <%= stylesheet_link_tag "application", :media => "all" %>

    <!-- For third-generation iPad with high-resolution Retina display: -->
    <!-- Size should be 144 x 144 pixels -->
    <%= favicon_link_tag 'apple-touch-icon-144x144-precomposed.png', :rel => 'apple-touch-icon-precomposed', :type => 'image/png', :sizes => '144x144' %>

    <!-- For iPhone with high-resolution Retina display: -->
    <!-- Size should be 114 x 114 pixels -->
    <%= favicon_link_tag 'apple-touch-icon-114x114-precomposed.png', :rel => 'apple-touch-icon-precomposed', :type => 'image/png', :sizes => '114x114' %>

    <!-- For first- and second-generation iPad: -->
    <!-- Size should be 72 x 72 pixels -->
    <%= favicon_link_tag 'apple-touch-icon-72x72-precomposed.png', :rel => 'apple-touch-icon-precomposed', :type => 'image/png', :sizes => '72x72' %>

    <!-- For non-Retina iPhone, iPod Touch, and Android 2.1+ devices: -->
    <!-- Size should be 57 x 57 pixels -->
    <%= favicon_link_tag 'apple-touch-icon-precomposed.png', :rel => 'apple-touch-icon-precomposed', :type => 'image/png' %>

    <!-- For all other devices -->
    <!-- Size should be 32 x 32 pixels -->
    <%= favicon_link_tag 'favicon.ico', :rel => 'shortcut icon' %>

    <%= javascript_include_tag "application" %>

    <!-- Le HTML5 shim, for IE6-8 support of HTML elements -->
    <!--[if lt IE 9]>
    <script src="//cdnjs.cloudflare.com/ajax/libs/html5shiv/3.7.2/html5shiv.min.js" type="text/javascript"></script>
    <![endif]-->
  </head>
  <body>

    <div class="navbar navbar-default navbar-static-top">
      <div class="container">
        <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-responsive-collapse">
          <span class="icon-bar"></span>
          <span class="icon-bar"></span>
          <span class="icon-bar"></span>
        </button>
        <a class="navbar-brand" href="#">FinanceTracker</a>
        <div class="navbar-collapse collapse navbar-responsive-collapse">
          <ul class="nav navbar-nav">
            <li><%= link_to "Link1", "/path1"  %></li>
            <li><%= link_to "Link2", "/path2"  %></li>
            <li><%= link_to "Link3", "/path3"  %></li>
          </ul>
        </div>
      </div>
    </div>

    <div class="container">
      <div class="row">
        <div class="col-lg-9">
          <%= bootstrap_flash %>
          <%= yield %>
        </div>
        <div class="col-lg-3">
          <div class="well sidebar-nav">
            <h3>Sidebar</h3>
            <ul class="nav nav-list">
              <li class="nav-header">Sidebar</li>
              <li><%= link_to "Link1", "/path1"  %></li>
              <li><%= link_to "Link2", "/path2"  %></li>
              <li><%= link_to "Link3", "/path3"  %></li>
            </ul>
          </div><!--/.well -->
        </div><!--/span-->
      </div><!--/row-->

      <footer>
        <p>&copy; Company 2017</p>
      </footer>

    </div> <!-- /container -->

  </body>
</html>

提前致谢！

Answer 1

这似乎不是一个设计问题。看起来图像apple-touch-icon-144x144-precomposed.png实际上并不存在于您的项目中。 Rails因为无法找到它而给你一个错误。

rails无法找到的apple-touch-icon-144x144-precomposed.png来自bootstrap主题。那些图像应该在你下载的主题文件夹中（除非你以某种方式删除了原件......然后你必须再次下载它）。如果您还不需要这些图片，则只需从html布局的<head>中删除所有favicon链接标记，错误就会消失。

- 或 -

您可以使用favicon生成器创建所需的生成器，并将这些特定文件名（在您的情况下为apple-touch-icon-144x144-precomposed.png）保存到项目中，错误也将消失。但是，再一次，如果你不需要它们，那么这样做是没有意义的。

老实说，如果您没有更改主题中的原始文件，我不确定您遇到此问题的原因，但您应该阅读THIS＆amp; THIS看看它是否有助于澄清事情。

希望有帮助＆amp;祝你的项目好运！