ruby-on-rails - find_by_idは引き続きActiveRecord::RecordNotFoundをトリガーします

Question

コントローラに存在しない投稿をクエリする場合

@post = Post.find_by_id(params[:id])

ActiveRecord::RecordNotFoundを取得します。しかし、レールコンソールで同じことをすると、何も返されません。

またfind_by_id!、404をトリガーすることになっている（感嘆符に注意してください）を試しましたが、それでもActiveRecord::RecordNotFoundが表示されます。

宝石がこの種の問題を引き起こす可能性があることがわかりました（質問：Rails Find_by_idは例外を発生させます）。私の質問は、使用する宝石が同じ問題を引き起こす可能性があることをどのように判断するかです。

これは私のGemfileです

source 'https://rubygems.org'

gem 'rails', '3.2.7'
gem 'pg'
gem 'jquery-rails'
gem 'fancybox-rails', :git => 'https://github.com/sverigemeny/fancybox-rails'
gem 'bcrypt-ruby', '~> 3.0.0'
gem 'omniauth-twitter'
gem 'omniauth-facebook'
gem 'omniauth-google-oauth2'
gem 'validates_email_format_of', :git => 'git://github.com/alexdunae/validates_email_format_of.git'
gem 'cancan'
gem 'thin'
gem 'chronic'
gem 'simple_form'
gem 'twitter'
gem 'kaminari'

group :assets do
  gem 'sass-rails'
  gem 'compass-rails'
  gem 'coffee-rails'
  gem 'uglifier', '>= 1.0.3'
end

group :development do
  gem 'quiet_assets'
  gem 'faker'
end

プロセス内のGemの依存関係が原因で他の多くのエラーをトリガーする可能性が高いため、この問題を引き起こす可能性のあるGemが見つかるまで、1つずつ無効にする方法がわかりません。

誰かが私がこれについてどうやって行くべきかについて何か考えを持っていますか？

更新ここに完全なスタックトレースがあります：

ActiveRecord::RecordNotFound in PostsController#edit

Couldn't find Post with id=123202

activerecord (3.2.7) lib/active_record/relation/finder_methods.rb:341:in `find_one'
activerecord (3.2.7) lib/active_record/relation/finder_methods.rb:312:in `find_with_ids'
activerecord (3.2.7) lib/active_record/relation/finder_methods.rb:107:in `find'
activerecord (3.2.7) lib/active_record/querying.rb:5:in `find'
cancan (1.6.8) lib/cancan/model_adapters/abstract_adapter.rb:20:in `find'
cancan (1.6.8) lib/cancan/controller_resource.rb:114:in `find_resource'
cancan (1.6.8) lib/cancan/controller_resource.rb:68:in `load_resource_instance'
cancan (1.6.8) lib/cancan/controller_resource.rb:32:in `load_resource'
cancan (1.6.8) lib/cancan/controller_resource.rb:25:in `load_and_authorize_resource'
cancan (1.6.8) lib/cancan/controller_resource.rb:10:in `block in add_before_filter'
activesupport (3.2.7) lib/active_support/callbacks.rb:418:in `_run__4208450199150212965__process_action__1027836660135587880__callbacks'
activesupport (3.2.7) lib/active_support/callbacks.rb:405:in `__run_callback'
activesupport (3.2.7) lib/active_support/callbacks.rb:385:in `_run_process_action_callbacks'
activesupport (3.2.7) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (3.2.7) lib/abstract_controller/callbacks.rb:17:in `process_action'
actionpack (3.2.7) lib/action_controller/metal/rescue.rb:29:in `process_action'
actionpack (3.2.7) lib/action_controller/metal/instrumentation.rb:30:in `block in process_action'
activesupport (3.2.7) lib/active_support/notifications.rb:123:in `block in instrument'
activesupport (3.2.7) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
activesupport (3.2.7) lib/active_support/notifications.rb:123:in `instrument'
actionpack (3.2.7) lib/action_controller/metal/instrumentation.rb:29:in `process_action'
actionpack (3.2.7) lib/action_controller/metal/params_wrapper.rb:207:in `process_action'
activerecord (3.2.7) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
actionpack (3.2.7) lib/abstract_controller/base.rb:121:in `process'
actionpack (3.2.7) lib/abstract_controller/rendering.rb:45:in `process'
actionpack (3.2.7) lib/action_controller/metal.rb:203:in `dispatch'
actionpack (3.2.7) lib/action_controller/metal/rack_delegation.rb:14:in `dispatch'
actionpack (3.2.7) lib/action_controller/metal.rb:246:in `block in action'
actionpack (3.2.7) lib/action_dispatch/routing/route_set.rb:73:in `call'
actionpack (3.2.7) lib/action_dispatch/routing/route_set.rb:73:in `dispatch'
actionpack (3.2.7) lib/action_dispatch/routing/route_set.rb:36:in `call'
journey (1.0.4) lib/journey/router.rb:68:in `block in call'
journey (1.0.4) lib/journey/router.rb:56:in `each'
journey (1.0.4) lib/journey/router.rb:56:in `call'
actionpack (3.2.7) lib/action_dispatch/routing/route_set.rb:600:in `call'
omniauth (1.1.1) lib/omniauth/strategy.rb:177:in `call!'
omniauth (1.1.1) lib/omniauth/strategy.rb:157:in `call'
omniauth (1.1.1) lib/omniauth/strategy.rb:177:in `call!'
omniauth (1.1.1) lib/omniauth/strategy.rb:157:in `call'
omniauth (1.1.1) lib/omniauth/strategy.rb:177:in `call!'
omniauth (1.1.1) lib/omniauth/strategy.rb:157:in `call'
omniauth (1.1.1) lib/omniauth/builder.rb:48:in `call'
actionpack (3.2.7) lib/action_dispatch/middleware/best_standards_support.rb:17:in `call'
rack (1.4.3) lib/rack/etag.rb:23:in `call'
rack (1.4.3) lib/rack/conditionalget.rb:25:in `call'
actionpack (3.2.7) lib/action_dispatch/middleware/head.rb:14:in `call'
actionpack (3.2.7) lib/action_dispatch/middleware/params_parser.rb:21:in `call'
actionpack (3.2.7) lib/action_dispatch/middleware/flash.rb:242:in `call'
rack (1.4.3) lib/rack/session/abstract/id.rb:210:in `context'
rack (1.4.3) lib/rack/session/abstract/id.rb:205:in `call'
actionpack (3.2.7) lib/action_dispatch/middleware/cookies.rb:338:in `call'
activerecord (3.2.7) lib/active_record/query_cache.rb:64:in `call'
activerecord (3.2.7) lib/active_record/connection_adapters/abstract/connection_pool.rb:473:in `call'
actionpack (3.2.7) lib/action_dispatch/middleware/callbacks.rb:28:in `block in call'
activesupport (3.2.7) lib/active_support/callbacks.rb:405:in `_run__503554315877740465__call__403817388267166975__callbacks'
activesupport (3.2.7) lib/active_support/callbacks.rb:405:in `__run_callback'
activesupport (3.2.7) lib/active_support/callbacks.rb:385:in `_run_call_callbacks'
activesupport (3.2.7) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (3.2.7) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
actionpack (3.2.7) lib/action_dispatch/middleware/reloader.rb:65:in `call'
actionpack (3.2.7) lib/action_dispatch/middleware/remote_ip.rb:31:in `call'
actionpack (3.2.7) lib/action_dispatch/middleware/debug_exceptions.rb:16:in `call'
actionpack (3.2.7) lib/action_dispatch/middleware/show_exceptions.rb:56:in `call'
railties (3.2.7) lib/rails/rack/logger.rb:26:in `call_app'
railties (3.2.7) lib/rails/rack/logger.rb:16:in `call'
quiet_assets (1.0.1) lib/quiet_assets.rb:20:in `call_with_quiet_assets'
actionpack (3.2.7) lib/action_dispatch/middleware/request_id.rb:22:in `call'
rack (1.4.3) lib/rack/methodoverride.rb:21:in `call'
rack (1.4.3) lib/rack/runtime.rb:17:in `call'
activesupport (3.2.7) lib/active_support/cache/strategy/local_cache.rb:72:in `call'
rack (1.4.3) lib/rack/lock.rb:15:in `call'
actionpack (3.2.7) lib/action_dispatch/middleware/static.rb:62:in `call'
railties (3.2.7) lib/rails/engine.rb:479:in `call'
railties (3.2.7) lib/rails/application.rb:220:in `call'
rack (1.4.3) lib/rack/content_length.rb:14:in `call'
railties (3.2.7) lib/rails/rack/log_tailer.rb:17:in `call'
thin (1.5.0) lib/thin/connection.rb:81:in `block in pre_process'
thin (1.5.0) lib/thin/connection.rb:79:in `catch'
thin (1.5.0) lib/thin/connection.rb:79:in `pre_process'
thin (1.5.0) lib/thin/connection.rb:54:in `process'
thin (1.5.0) lib/thin/connection.rb:39:in `receive_data'
eventmachine (1.0.0) lib/eventmachine.rb:187:in `run_machine'
eventmachine (1.0.0) lib/eventmachine.rb:187:in `run'
thin (1.5.0) lib/thin/backends/base.rb:63:in `start'
thin (1.5.0) lib/thin/server.rb:159:in `start'
rack (1.4.3) lib/rack/handler/thin.rb:13:in `run'
rack (1.4.3) lib/rack/server.rb:268:in `start'
railties (3.2.7) lib/rails/commands/server.rb:70:in `start'
railties (3.2.7) lib/rails/commands.rb:55:in `block in <top (required)>'
railties (3.2.7) lib/rails/commands.rb:50:in `tap'
railties (3.2.7) lib/rails/commands.rb:50:in `<top (required)>'
script/rails:6:in `require'
script/rails:6:in `<main>'

score 2 · Accepted Answer

drewinglisが指摘したように、これはカンカンが原因です。

Cancanは投稿を読み込んで、ユーザーが投稿に対して何らかのアクションを実行する権限を持っているかどうかを判断します。投稿が見つからない場合は、404、ActiveRecord::RecordNotFoundで応答します。

ここで、ライアンはこの背後にある理由を少し説明します。https ://github.com/ryanb/cancan/issues/43必要な動作でない場合は、404からの救出も提案します。

score 0 · Accepted Answer

drwesinglisとcheeseweaselは正しいです、これはCanCanによって引き起こされました。https://github.com/ryanb/cancan/issues/43の投稿からソリューションを機能させることができなかったため、コントローラーから削除load_and_authorize_resourceし、ユーザーがアクションを完了する権限があるかどうかを手動で確認しています。。

私のコントローラーは次のようになります。

@post = Post.find_by_id(params[:id])
if @post
  if can? :update, @post
    ...
  else
    flash[:error] = 'You are not authorized to access this post.'
    redirect_to root_url
  end
else
  flash[:error] = 'This post doesn\'t exist.'
  redirect_to root_url
end

開発サイクルの後半でコードを更新して、より良い404ページにリダイレクトしますが、今のところはメッセージを表示するだけです。

ruby-on-rails - find_by_idは引き続きActiveRecord::RecordNotFoundをトリガーします

2 に答える 2

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