TLDR:require 'classname'
別のモデル ファイルで使用すると (列を逆シリアル化できるため)、ローカルでは機能しますがNo such file to load -- Classname
、Heroku にデプロイするときにエラーが発生します。
私は、別のモデルのオブジェクトの配列を含むモデル属性をシリアル化するという、明らかに悪い設計上の決定を下しました (オブジェクトUserCategoryQueue
のシリアル化されたキューがありCard
ます)。これらのオブジェクトを実際に逆シリアル化するために、「 YAML::load raises undefined class/module error to use require 'Card'
in the files where I need to deserial that column.」のアドバイスに従いました。これにより、オブジェクトに到達したときに YAML が何を見ているのかがわからないという問題が回避されCard
ます。
これは localhost サーバーでは問題なく動作しますが、Heroku にデプロイするときに多くの問題が発生しましたNo such file to load -- Card"
。最初に、これはアセットのプリコンパイル段階で発生し、次にアセットを自分でプリコンパイルしまし$ heroku run rake db:migrate
たが、最初にすべてをセットアップするために実行しようとすると、同じエラーが発生しました。
サンプル ファイル:
# 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
これにより、最終的に Heroku へのプッシュ時に次のエラーが発生しました (アセットのプリコンパイルを試みる前に)。
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)
! ! アセットのプリコンパイルに失敗しました。
先ほど言ったように、アセットをプリコンパイルするときでも、プッシュはうまくいきましたが、その後のデータベース マイグレーションで同じエラー ポップアップが表示されました。