require_tree参数必须是Rails 5升级应用程序中的目录

Question

我刚刚将我的应用程序升级Rails 4.2.7为Rails 5.0.0.1.我使用RailsDiff来确保我已经覆盖了所有内容,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.唯一的样式是默认的scaffold.scss.

可能是什么导致了这个？

Answer 1

我终于弄明白了.因为我正在进行升级,RailsDiff没有告诉我,我错过了一些东西.

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app/assets/javascripts/cable.js,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被调用的内部创建一个空文件夹channels.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的空文件.keep.

所以,一旦我做了以下,一切都像一个魅力:

• 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

面临类似的问题，但不是同一个问题。Rails 从 5.2.3 升级到 5.2.4.1 期间

$ rails s回到：

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

好的，按照说明，manifest.js用上面的内容创建，然后

$ rails s回到：

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

使固定：

.keep在新文件夹中创建空文件images（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 3

使用rails new appname --skip-keeps标志时会出现问题- 它仍然试图要求不存在的文件，并且通常是 Rails 团队方面的错误。

这只是解决所描述问题的不同方法，主要解决方案完美无缺；

1. 打开 app/assets/javascripts/cable.js
2. //= require_tree ./channels从第 6 行删除自动生成

保持您的代码库尽可能小，有人.keep出于某种原因跳过了s。