Question

我刚刚将我的应用从Rails 4.2.7升级为Rails 5.0.0.1。我使用RailsDiff来确保我覆盖了所有内容，我相信我做到了。到目前为止，一切都运行良好，直到加载我的应用程序。

现在我看到了这个错误：

Sprockets::ArgumentError at /
require_tree argument must be a directory

这是我的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, vendor/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_tree .
 *= require_self
 */

这是我的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 any plugin's vendor/assets/javascripts directory 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
// compiled file. JavaScript code in this file should be added after the last require_* statement.
//
// Read Sprockets README (https://github.com/rails/sprockets#sprockets-directives) for details
// about supported directives.
//
//= require jquery
//= require jquery_ujs
//= require turbolinks
//= require_tree .

这就是服务器日志的样子：

Started GET "/" for ::1 at 2016-09-02 09:08:19 -0500
  ActiveRecord::SchemaMigration Load (1.5ms)  SELECT "schema_migrations".* FROM "schema_migrations"
  User Load (1.7ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 ORDER BY "users"."id" ASC LIMIT $2  [["id", 2], ["LIMIT", 1]]
Processing by ProfilesController#index as HTML
  Rendering profiles/index.html.erb within layouts/application
  Profile Load (1.6ms)  SELECT "profiles".* FROM "profiles"
  Rendered profiles/index.html.erb within layouts/application (45.8ms)
Completed 500 Internal Server Error in 367ms (ActiveRecord: 6.3ms)


DEPRECATION WARNING: #original_exception is deprecated. Use #cause instead. (called from initialize at /.rvm/gems/ruby-2.3.1@myapp/gems/better_errors-2.1.1/lib/better_errors/raised_exception.rb:7)
DEPRECATION WARNING: #original_exception is deprecated. Use #cause instead. (called from initialize at /.rvm/gems/ruby-2.3.1myapp/gems/better_errors-2.1.1/lib/better_errors/raised_exception.rb:8)

Sprockets::ArgumentError - require_tree argument must be a directory:
  sprockets (3.7.0) lib/sprockets/directive_processor.rb:182:in `rescue in block in process_directives'
  sprockets (3.7.0) lib/sprockets/directive_processor.rb:179:in `block in process_directives'
  sprockets (3.7.0) lib/sprockets/directive_processor.rb:178:in `process_directives'

我没有使用任何类型的插件。这是一个相当简单/香草的应用程序。唯一的样式来自默认的scaffold.scss。

导致这种情况的原因是什么？

Answer 1

我终于明白了。因为我正在升级，RailsDiff没有告诉我，我错过了什么。

因此错误消息不正确，但是，我忘记做的是创建一个空目录。

在我的app/assets/javascripts/cable.js中，我有以下内容：

//= require_tree ./channels

但是，我忘了实际创建该文件夹。

所以要解决这个问题，我所要做的就是在app/assets/javascripts内创建一个名为channels的空文件夹。另外，因为git忽略空目录，在新创建的文件夹中，我还必须创建一个名为.keep的空文件。

所以，一旦我做了以下事情，一切都像魅力一样：

创建文件夹：app/assets/javascripts/channels
在该文件夹中创建空文件：app/assets/javascripts/channels/.keep

现在一切都很完美。

Answer 2

使用rails new appname --skip-keeps标志时会出现问题-它仍然尝试要求不存在的文件，通常是Rails团队的错误。

这只是解决上述问题的另一种方法，主要解决方案运行良好；

打开app/assets/javascripts/cable.js
从第6行中删除自动生成的//= require_tree ./channels

将您的代码库保持尽可能小，有人出于某种原因跳过了.keep。

Answer 3

遇到类似但不相同的问题。在将Rails从5.2.3升级到5.2.4.1的过程中

$ rails s返回：

Expected to find a manifest file in `app/assets/config/manifest.js` (Sprockets::Railtie::ManifestNeededError)
But did not, please create this file and use it to link any assets that need to be rendered by your app:

Example:
  //= link_tree ../images
  //= link_directory ../javascripts .js
  //= link_directory ../stylesheets .css
and restart your server

好，按照说明，用上述内容创建manifest.js，然后

$ rails s返回：

Sprockets::ArgumentError at / link_tree argument must be a directory

修复：

在新的.keep文件夹中创建空的images文件（该文件可能在过去的某个时刻被删除，没有任何直接后果）：

app/assets/images/.keep

Answer 4

如果您不使用ActionCable 然后删除app/assets/javascripts/cable.js

中的所有内容

require_tree参数必须是Rails 5升级应用程序中的目录

4 个答案: