运行rake资源时出错:预编译？

Question

我处于一种不可动摇的境地，我不得不在ubuntu服务器上部署一个ruby one rails应用程序，没有任何文档，也没有太多使用ruby (或ruby on rails)的经验。

我尝试按照各种论坛/教程中列出的步骤进行操作。我已经在端口80上启动了WEBricks服务器，但是当我尝试从浏览器访问web应用程序的那一刻，我得到了以下信息，而不是浏览器。

couldn't find file './compiled/admin' under '/home/ubuntu/www/my-app/app/assets/stylesheets' with type 'text/css'

然后有人建议我参选

rake assets:precompile

当我运行这个命令时，我得到了以下错误...

    DEPRECATION WARNING: Currently, Active Record suppresses errors raised within `after_rollback`/`after_commit` callbacks and only print them to the logs. In the next version, these errors will no longer be suppressed. Instead, the errors will propagate normally just like in other Active Record callbacks.

You can opt into the new behavior and remove this warning by setting:

  config.active_record.raise_in_transactional_callbacks = true

 (called from <class:User> at /home/ubuntu/www/my-app/app/models/user.rb:27)
rake aborted!
Sprockets::FileNotFound: couldn't find file './compiled/admin' under '/home/ubuntu/www/my-app/app/assets/stylesheets' with type 'text/css'
/home/ubuntu/www/my-app/app/assets/stylesheets/admin.css:10
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/resolve.rb:64:in `resolve!'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/directive_processor.rb:399:in `resolve'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/directive_processor.rb:207:in `process_require_directive'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/directive_processor.rb:180:in `block in process_directives'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/directive_processor.rb:178:in `each'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/directive_processor.rb:178:in `process_directives'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/directive_processor.rb:83:in `_call'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/directive_processor.rb:68:in `call'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/processor_utils.rb:75:in `call_processor'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/processor_utils.rb:57:in `block in call_processors'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/processor_utils.rb:56:in `reverse_each'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/processor_utils.rb:56:in `call_processors'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/loader.rb:86:in `load_asset_by_uri'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/loader.rb:45:in `block in load'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/loader.rb:155:in `fetch_asset_from_dependency_cache'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/loader.rb:38:in `load'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/cached_environment.rb:20:in `block in initialize'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/cached_environment.rb:47:in `load'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/bundle.rb:23:in `block in call'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/utils.rb:183:in `dfs'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/bundle.rb:24:in `call'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/processor_utils.rb:75:in `call_processor'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/processor_utils.rb:57:in `block in call_processors'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/processor_utils.rb:56:in `reverse_each'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/processor_utils.rb:56:in `call_processors'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/loader.rb:86:in `load_asset_by_uri'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/loader.rb:45:in `block in load'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/loader.rb:155:in `fetch_asset_from_dependency_cache'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/loader.rb:38:in `load'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/cached_environment.rb:20:in `block in initialize'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/cached_environment.rb:47:in `load'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/base.rb:63:in `find_asset'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/base.rb:70:in `find_all_linked_assets'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/manifest.rb:130:in `block in find'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/manifest.rb:129:in `each'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/manifest.rb:129:in `find'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/sprockets/manifest.rb:162:in `compile'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-rails-2.3.2/lib/sprockets/rails/task.rb:70:in `block (3 levels) in define'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-3.2.0/lib/rake/sprocketstask.rb:147:in `with_logger'
/home/ubuntu/.rvm/gems/ruby-2.3.0/gems/sprockets-rails-2.3.2/lib/sprockets/rails/task.rb:69:in `block (2 levels) in define'
Tasks: TOP => assets:precompile
(See full trace by running task with --trace)

任何帮助都将不胜感激。如果你想让我提供任何其他信息，请提出来。

以下是app/assets/stylesheets/admin.css文件

/*
 * Admin stylesheets
 *
 *= require select2
 *= require select2-bootstrap
 *= require_tree ./plugins
 *= require_tree ./fonts
 *
 * Pull compiled from /app/assets/stylesheets/compiled
 *= require ./compiled/admin
 *
 */

Gemfile如下所示。

source 'https://rubygems.org'

gem 'rails', '4.2.0'
gem 'sass-rails', '~> 5.0.3'
gem 'less-rails', '~> 2.7.0'
gem 'therubyracer'
gem 'uglifier', '>= 1.3.0'
gem 'coffee-rails', '~> 4.1.0'
gem 'jquery-rails'
gem 'sqlite3', group: :development
gem 'pg'

#bootstrap components
gem 'bootstrap-datepicker-rails'
gem "select2-rails"

#images upload
gem "paperclip", "~> 4.2"
gem 'aws-sdk', '~> 1.6'

group :development do
  gem 'capistrano', '~> 2'
  gem 'spring'
  gem 'better_errors'
  gem 'binding_of_caller'
  gem 'pry'
  gem 'pry-rails'
  gem 'awesome_print' # https://github.com/michaeldv/awesome_print
end

gem 'rails_12factor', group: [:production, :staging]

#user managment
gem 'devise'
gem 'cancancan', '~> 1.10'
gem 'recaptcha', require: 'recaptcha/rails'
#tracking user data
gem 'classy_enum'

#pagination
gem 'kaminari'

#api serialization
gem 'active_model_serializers'
# To use Jbuilder templates for JSON
gem 'jbuilder'

#dropbox
gem "dropbox-api"

#sidekiq jobs
gem 'sidekiq'
gem 'sidekiq-status'
gem 'sinatra', :require => nil

#for the folders hierarchy tree
gem 'closure_tree'

# PDFs
gem 'doc_raptor'

# Excel Parsing
gem 'roo'

# Emails
gem 'sendgrid'

# auto increment numbers
gem 'protokoll'

# State machine
gem 'aasm'

#elastic search
gem 'elasticsearch-model', git: 'git://github.com/elasticsearch/elasticsearch-rails.git'
gem 'elasticsearch-rails', git: 'git://github.com/elasticsearch/elasticsearch-rails.git'

gem 'rubyzip'

gem 'exception_notification', group: [:production, :staging], github: 'joshco/exception_notification'

gem 'spreadsheet'

app文件夹中的文件列表

drwxrwxr-x 11 ubuntu ubuntu 4096 Apr  1 08:03 app
drwxrwxr-x  2 ubuntu ubuntu 4096 Apr  1 08:03 bin
drwxrwxr-x  3 ubuntu ubuntu 4096 Apr  1 08:03 client
drwxrwxr-x  5 ubuntu ubuntu 4096 Apr  5 22:08 config
-rw-rw-r--  1 ubuntu ubuntu  153 Apr  1 08:03 config.ru
drwxrwxr-x  4 ubuntu ubuntu 4096 Apr  1 08:03 db
-rw-rw-r--  1 ubuntu ubuntu 1570 Apr  1 08:03 Gemfile
-rw-rw-r--  1 ubuntu ubuntu 9072 Apr  1 08:03 Gemfile.lock
drwxrwxr-x  5 ubuntu ubuntu 4096 Apr  1 08:03 gulp
-rw-rw-r--  1 ubuntu ubuntu  557 Apr  1 08:03 gulpfile.js
drwxrwxr-x  6 ubuntu ubuntu 4096 Apr  1 08:03 lib
drwxrwxr-x  2 ubuntu ubuntu 4096 Apr  6 13:48 log
-rw-rw-r--  1 ubuntu ubuntu 1393 Apr  1 08:03 package.json
-rw-rw-r--  1 ubuntu ubuntu  146 Apr  1 08:03 Procfile
-rw-rw-r--  1 ubuntu ubuntu  143 Apr  1 08:03 Procfile.example
drwxrwxr-x  2 ubuntu ubuntu 4096 Apr  1 08:03 public
-rw-rw-r--  1 ubuntu ubuntu  249 Apr  1 08:03 Rakefile
-rw-rw-r--  1 ubuntu ubuntu 7908 Apr  1 08:03 README.md
drwxrwxr-x  8 ubuntu ubuntu 4096 Apr  1 08:03 test
drwxrwxr-x  6 ubuntu ubuntu 4096 Apr  5 15:14 tmp
drwxrwxr-x  3 ubuntu ubuntu 4096 Apr  1 08:03 vendor
-rw-rw-r--  1 ubuntu ubuntu   64 Apr  1 08:03 webpack.config.js

Answer 1

您的问题是，您需要生成将放在此stylesheets/compiled文件夹中的文件。

有两个选项：

1. 了解如何生成它们(如果您有关于bower、grunt等的文件，请检查项目的根目录。如果有，我建议您需要启动这些文件才能实际生成文件)，并在资产编译或提交结果之前添加相应的部署规则。

1. 从admin.css文件中删除以下行：

*= require ./compiled/admin