1

TLDR：require 'classname'在另一个模型文件中使用（所以我可以反序列化列）在本地工作，但在No such file to load -- Classname部署到 Heroku 时会导致错误。

我已经做出了公认的糟糕的设计决定来序列化一个模型属性，该属性包含另一个模型对象的数组（UserCategoryQueue有一个序列化的Card对象队列）。为了真正反序列化这些对象，我遵循了YAML::load raises undefined class/module errorrequire 'Card'中的建议，以便在需要反序列化该列的文件中使用。Card这避免了 YAML 在到达对象时不知道它在看什么的问题。

这在 localhost 服务器上运行良好，但在部署到 Heroku 时导致了很多问题，所有的表单都是No such file to load -- Card". 最初，这发生在资产预编译阶段，然后我自己预编译了资产，当我第一次尝试运行$ heroku run rake db:migrate以设置所有内容时，同样的错误已经转移。

示例文件：

# app/models/user_category_queue.rb
class UserCategoryQueue < ActiveRecord::Base
  ...
  # Our queue of Cards
  serialize :queue, Array
end

# app/models/quiz.rb
class Quiz < ActiveRecord::Base
  ...
  require 'Card'
  ...
  # grab a random card from the user's queues
  # produces YAML error without the above require statement
  def sample_card
    self.user.user_category_queues.sample.queue.sample
  end
end

这最终导致在推送到 Heroku 时出现以下错误（在我尝试进行任何资产预编译之前）：

 Running: rake assets:precompile
   rake aborted!
   No such file to load -- Card
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `require'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `block in require'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:213:in `load_dependency'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `require'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/app/models/quiz.rb:18:in `<class:Quiz>'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/app/models/quiz.rb:1:in `<top (required)>'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `require'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `block in require'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:213:in `load_dependency'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `require'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:329:in `require_or_load'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:288:in `depend_on'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:206:in `require_dependency'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/engine.rb:465:in `block (2 levels) in eager_load!'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/engine.rb:464:in `each'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/engine.rb:464:in `block in eager_load!'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/engine.rb:462:in `each'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/engine.rb:462:in `eager_load!'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/engine.rb:347:in `eager_load!'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/application/finisher.rb:56:in `each'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/application/finisher.rb:56:in `block in <module:Finisher>'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/initializable.rb:30:in `instance_exec'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/initializable.rb:30:in `run'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/initializable.rb:55:in `block in run_initializers'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/initializable.rb:54:in `run_initializers'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/application.rb:215:in `initialize!'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/railtie/configurable.rb:30:in `method_missing'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/config/environment.rb:5:in `<top (required)>'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `require'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `block in require'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:213:in `load_dependency'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `require'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/application.rb:189:in `require_environment!'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/application.rb:249:in `block in run_tasks_blocks'
   /tmp/build_d0e6e2b8-a3fd-4a90-ae44-e703b0093401/vendor/bundle/ruby/2.0.0/gems/sprockets-rails-2.0.0/lib/sprockets/rails/task.rb:54:in `block (2 levels) in define'
   Tasks: TOP => environment
   (See full trace by running task with --trace)

！！预编译资产失败。

正如我所说，即使在预编译资产时，虽然推送很顺利，但随后的数据库迁移也会弹出相同的错误。

4

1 回答 1

0

Heroku 运行区分大小写的文件系统，而您的操作系统可能不区分大小写。尝试将其更改为此：

 require 'card'

作为一般经验法则，Ruby 中的大多数文件都需要使用带有下划线作为单词分隔符的小写字母，如下所示：

 require 'card_shuffler'
于 2013-10-21T03:25:48.317 回答