未定義方法預編譯資產錯誤

Question

我一直在做我的應用程序上的一些工作，最近我跑了

rake assets:precompile:primary RAILS_ENV=production --trace

最終結果是此錯誤：

NoMethodError: undefined method 'bytesize' for nil:NilClass

根本沒有提供信息，並且跟蹤對我沒有多大幫助

** Invoke assets:precompile:primary (first_time)
** Invoke assets:environment (first_time)
** Execute assets:environment
** Invoke tmp:cache:clear (first_time)
** Execute tmp:cache:clear
** Execute assets:precompile:primary
rake aborted!
NoMethodError: undefined method `bytesize' for nil:NilClass
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/rack-1.4.7/lib/rack/utils.rb:300:in `bytesize'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/processed_asset.rb:13:in `initialize'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/base.rb:249:in `new'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/base.rb:249:in `block in build_asset'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/base.rb:270:in `circular_call_protection'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/base.rb:248:in `build_asset'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/index.rb:93:in `block in build_asset'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/caching.rb:19:in `cache_asset'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/index.rb:92:in `build_asset'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/base.rb:169:in `find_asset'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/index.rb:60:in `find_asset'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/processed_asset.rb:111:in `block in resolve_dependencies'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/processed_asset.rb:105:in `each'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/processed_asset.rb:105:in `resolve_dependencies'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/processed_asset.rb:97:in `build_required_assets'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/processed_asset.rb:16:in `initialize'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/base.rb:249:in `new'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/base.rb:249:in `block in build_asset'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/base.rb:270:in `circular_call_protection'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/base.rb:248:in `build_asset'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/index.rb:93:in `block in build_asset'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/caching.rb:19:in `cache_asset'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/index.rb:92:in `build_asset'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/base.rb:169:in `find_asset'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/index.rb:60:in `find_asset'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/bundled_asset.rb:16:in `initialize'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/base.rb:252:in `new'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/base.rb:252:in `build_asset'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/index.rb:93:in `block in build_asset'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/caching.rb:19:in `cache_asset'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/index.rb:92:in `build_asset'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/base.rb:169:in `find_asset'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/index.rb:60:in `find_asset'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/environment.rb:78:in `find_asset'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/actionpack-3.2.22.1/lib/sprockets/static_compiler.rb:19:in `block in compile'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/base.rb:219:in `block in each_logical_path'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/base.rb:206:in `block (2 levels) in each_file'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/base.rb:196:in `each'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/base.rb:196:in `each_entry'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/base.rb:204:in `block in each_file'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/base.rb:203:in `each'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/base.rb:203:in `each_file'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/sprockets-2.2.3/lib/sprockets/base.rb:217:in `each_logical_path'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/actionpack-3.2.22.1/lib/sprockets/static_compiler.rb:18:in `compile'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/actionpack-3.2.22.1/lib/sprockets/assets.rake:56:in `internal_precompile'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/actionpack-3.2.22.1/lib/sprockets/assets.rake:70:in `block (3 levels) in <top (required)>'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/rake-10.5.0/lib/rake/task.rb:240:in `call'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/rake-10.5.0/lib/rake/task.rb:240:in `block in execute'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/rake-10.5.0/lib/rake/task.rb:235:in `each'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/rake-10.5.0/lib/rake/task.rb:235:in `execute'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/rake-10.5.0/lib/rake/task.rb:179:in `block in invoke_with_call_chain'
/Users/jasontanner/.rvm/rubies/ruby-2.0.0-p643/lib/ruby/2.0.0/monitor.rb:211:in `mon_synchronize'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/rake-10.5.0/lib/rake/task.rb:172:in `invoke_with_call_chain'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/rake-10.5.0/lib/rake/task.rb:165:in `invoke'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/rake-10.5.0/lib/rake/application.rb:150:in `invoke_task'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/rake-10.5.0/lib/rake/application.rb:106:in `block (2 levels) in top_level'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/rake-10.5.0/lib/rake/application.rb:106:in `each'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/rake-10.5.0/lib/rake/application.rb:106:in `block in top_level'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/rake-10.5.0/lib/rake/application.rb:115:in `run_with_threads'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/rake-10.5.0/lib/rake/application.rb:100:in `top_level'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/rake-10.5.0/lib/rake/application.rb:78:in `block in run'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/rake-10.5.0/lib/rake/application.rb:176:in `standard_exception_handling'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/rake-10.5.0/lib/rake/application.rb:75:in `run'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/gems/rake-10.5.0/bin/rake:33:in `<top (required)>'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/bin/rake:19:in `load'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/bin/rake:19:in `<main>'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/bin/ruby_executable_hooks:15:in `eval'
/Users/jasontanner/.rvm/gems/ruby-2.0.0-p643/bin/ruby_executable_hooks:15:in `<main>'
Tasks: TOP => assets:precompile:primary

這是我的生產環境文件。

Galapal::Application.configure do
  # Settings specified here will take precedence over those in config/application.rb

  # In the development environment your application's code is reloaded on
  # every request. This slows down response time but is perfect for development
  # since you don't have to restart the web server when you make code changes.
  config.cache_classes = true

  # Log error messages when you accidentally call methods on nil.
  config.whiny_nils = true

  # Show full error reports and disable caching
  config.consider_all_requests_local       = true
  config.action_controller.perform_caching = false

  # Don't care if the mailer can't send
  config.action_mailer.raise_delivery_errors = false

  # Print deprecation notices to the Rails logger
  config.active_support.deprecation = :log

  # For angular js compression
  config.assets.js_compressor = Uglifier.new(mangle: false)

  # Only use best-standards-support built into browsers
  config.action_dispatch.best_standards_support = :builtin

  # Raise exception on mass assignment protection for Active Record models
  config.active_record.mass_assignment_sanitizer = :strict

  # Log the query plan for queries taking more than this (works
  # with SQLite, MySQL, and PostgreSQL)
  config.active_record.auto_explain_threshold_in_seconds = 0.5

  # Do not compress assets
  config.assets.compress = true

  config.assets..serve_static_assets = true  

  # Expands the lines which load the assets
  config.assets.debug = false

  # Expands the lines which load the assets
  config.assets.debug = false

  #ActiveRecord::Base.logger = Logger.new STDOUT


end

所以我的問題是這個。 為什么我不能預編譯資產，以及如何解決此問題？ 我正在運行Rails 3.2.22 。

Answer 1

我對此問題做了一些深入研究，看來至少有兩個原因可能會發生這種情況：

1）您有空資產

2）您的資產之一中包含非utf8字符（請檢查代碼中帶重音等字符的注釋）。

請參閱此以獲取有關“需要”的參考信息，特別是通過“在application.css的底部添加空類”解決問題的人github.com/zweilove/css_splitter/issues/12。還可以嘗試通過從中刪除所有資產來進行調試您的清單，然后開始逐個添加，直到損壞為止。 祝好運！

Answer 2

我對一個JavaScript文件有這個問題，該文件具有某種奇怪的格式（來自漂亮的庫），而Rails則對此提出了質疑。

NoMethodError: undefined method `bytesize' for nil:NilClass
/Users/joel/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/rack-1.6.8/lib/rack/utils.rb:380:in `bytesize'
/Users/joel/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-2.12.4/lib/sprockets/processed_asset.rb:13:in `initialize'

為了弄清楚哪個文件，我挖了gem路徑，並在sprockets/processed_asset.rb添加了一些代碼以打印文件：

  context = environment.context_class.new(environment, logical_path, pathname)
  @source = context.evaluate(pathname)
  p pathname
  @length = Rack::Utils.bytesize(source)

下次我整理資產時，它向我顯示了罪魁禍首。