削除に失敗した場合でも、ユーザー削除メールが送信される

[Moin]

ログインが必要なフォーラムのユーザー削除をレビューキューからテストしている最中に、ユーザーがログイン必須フォーラムのガイドラインリンクをクリックした場合に何が起こるかを確認していたところ、奇妙な現象が発生しました。ユーザーがアカウント削除の通知メールを2通受け取ったのです。実際、最初のメールは誤報でした。ユーザーは削除されていないにもかかわらず、メールが送信されてしまいました。

以下の手順のすべてが本当に必要かどうかはわかりませんが、再現が困難だったため、手順が見つかったことに満足しており、他のフラグタイプやフラグの処理方法でも同様の問題が発生するかどうかを試すつもりはありませんでした。

準備

ユーザーから追加の入力を必要とするカスタムフラグが必要です。また、自動非表示機能を有効にしましたが、これが関係するかどうかは不明です。次に、削除対象のユーザー（スパマー）、管理者ユーザー、そしてもう一人のユーザーを用意します。

再現手順

1. スパマーがトピックを作成
2. スパマーが自身の投稿をスパムとしてフラグ付け
   
   
3. 他のユーザーが「その他」を使用して投稿をフラグ付け
4. 管理者がトピックを削除
   
   
5. 管理者がトピックを復元
6. 管理者がカスタムフラグタイプを使用して投稿をフラグ付け
   
   
   
   （この場合、フラグ付け時にトピックは非表示になっていましたが、これが関係するかどうかは不明です）
7. レビューキューで、管理者が「はい → ユーザーを削除」を選択
   

結果

• ユーザーは削除されませんでした
• しかし、メールが送信されました：
  
  
• メールログにはエントリがありません（メールは送信されたにもかかわらず）
• ブラウザのコンソールにエラーが表示されます：201/perform/delete_user?version=1:1 リソースの読み込みに失敗しました：サーバーがステータス 500 で応答しました ()
• /logs にエラーがあります：NoMethodError (nil の未定義メソッド score’)`

error

NoMethodError (nil の未定義メソッド `score')
app/models/reviewable.rb:732:in `recalculate_score'
app/models/reviewable.rb:375:in `block in perform'
app/models/reviewable.rb:366:in `perform'
app/controllers/reviewables_controller.rb:273:in `perform'
app/controllers/application_controller.rb:428:in `block in with_resolved_locale'
app/controllers/application_controller.rb:428:in `with_resolved_locale'
lib/middleware/omniauth_bypass_middleware.rb:35:in `call'
lib/content_security_policy/middleware.rb:12:in `call'
lib/middleware/anonymous_cache.rb:415:in `call'
lib/middleware/csp_script_nonce_injector.rb:12:in `call'
config/initializers/008-rack-cors.rb:26:in `call'
lib/middleware/default_headers.rb:13:in `call'
config/initializers/100-quiet_logger.rb:20:in `call'
config/initializers/100-silence_logger.rb:29:in `call'
lib/middleware/enforce_hostname.rb:24:in `call'
lib/middleware/processing_request.rb:12:in `call'
lib/middleware/request_tracker.rb:385:in `call'


バックトレース

app/models/reviewable.rb:732:in `recalculate_score'
app/models/reviewable.rb:375:in `block in perform'
activerecord (7.2.2.1) lib/active_record/connection_adapters/abstract/transaction.rb:616:in `block in within_new_transaction'
activesupport (7.2.2.1) lib/active_support/concurrency/null_lock.rb:9:in `synchronize'
activerecord (7.2.2.1) lib/active_record/connection_adapters/abstract/transaction.rb:613:in `within_new_transaction'
activerecord (7.2.2.1) lib/active_record/connection_adapters/abstract/database_statements.rb:361:in `transaction'
activerecord (7.2.2.1) lib/active_record/transactions.rb:234:in `block in transaction'
activerecord (7.2.2.1) lib/active_record/connection_adapters/abstract/connection_pool.rb:415:in `with_connection'
activerecord (7.2.2.1) lib/active_record/connection_handling.rb:296:in `with_connection'
activerecord (7.2.2.1) lib/active_record/transactions.rb:233:in `transaction'
app/models/reviewable.rb:366:in `perform'
app/controllers/reviewables_controller.rb:273:in `perform'
actionpack (7.2.2.1) lib/action_controller/metal/basic_implicit_render.rb:8:in `send_action'
actionpack (7.2.2.1) lib/abstract_controller/base.rb:226:in `process_action'
actionpack (7.2.2.1) lib/action_controller/metal/rendering.rb:193:in `process_action'
actionpack (7.2.2.1) lib/abstract_controller/callbacks.rb:261:in `block in process_action'
activesupport (7.2.2.1) lib/active_support/callbacks.rb:121:in `block in run_callbacks'
app/controllers/application_controller.rb:428:in `block in with_resolved_locale'
i18n (1.14.7) lib/i18n.rb:353:in `with_locale'
app/controllers/application_controller.rb:428:in `with_resolved_locale'
activesupport (7.2.2.1) lib/active_support/callbacks.rb:130:in `block in run_callbacks'
activesupport (7.2.2.1) lib/active_support/callbacks.rb:141:in `run_callbacks'
actionpack (7.2.2.1) lib/abstract_controller/callbacks.rb:260:in `process_action'
actionpack (7.2.2.1) lib/action_controller/metal/rescue.rb:27:in `process_action'
actionpack (7.2.2.1) lib/action_controller/metal/instrumentation.rb:77:in `block in process_action'
activesupport (7.2.2.1) lib/active_support/notifications.rb:210:in `block in instrument'
activesupport (7.2.2.1) lib/active_support/notifications/instrumenter.rb:58:in `instrument'
activesupport (7.2.2.1) lib/active_support/notifications.rb:210:in `instrument'
actionpack (7.2.2.1) lib/action_controller/metal/instrumentation.rb:76:in `process_action'
actionpack (7.2.2.1) lib/action_controller/metal/params_wrapper.rb:259:in `process_action'
activerecord (7.2.2.1) lib/active_record/railties/controller_runtime.rb:39:in `process_action'
actionpack (7.2.2.1) lib/abstract_controller/base.rb:163:in `process'
actionview (7.2.2.1) lib/action_view/rendering.rb:40:in `process'
rack-mini-profiler (3.3.1) lib/mini_profiler/profiling_methods.rb:89:in `block in profile_method'
actionpack (7.2.2.1) lib/action_controller/metal.rb:252:in `dispatch'
actionpack (7.2.2.1) lib/action_controller/metal.rb:335:in `dispatch'
actionpack (7.2.2.1) lib/action_dispatch/routing/route_set.rb:67:in `dispatch'
actionpack (7.2.2.1) lib/action_dispatch/routing/route_set.rb:50:in `serve'
actionpack (7.2.2.1) lib/action_dispatch/journey/router.rb:53:in `block in serve'
actionpack (7.2.2.1) lib/action_dispatch/journey/router.rb:133:in `block in find_routes'
actionpack (7.2.2.1) lib/action_dispatch/journey/router.rb:126:in `each'
actionpack (7.2.2.1) lib/action_dispatch/journey/router.rb:126:in `find_routes'
actionpack (7.2.2.1) lib/action_dispatch/journey/router.rb:34:in `serve'
actionpack (7.2.2.1) lib/action_dispatch/routing/route_set.rb:896:in `call'
lib/middleware/omniauth_bypass_middleware.rb:35:in `call'
rack (2.2.13) lib/rack/tempfile_reaper.rb:15:in `call'
rack (2.2.13) lib/rack/conditional_get.rb:40:in `call'
rack (2.2.13) lib/rack/head.rb:12:in `call'
actionpack (7.2.2.1) lib/action_dispatch/http/permissions_policy.rb:38:in `call'
lib/content_security_policy/middleware.rb:12:in `call'
lib/middleware/anonymous_cache.rb:415:in `call'
lib/middleware/csp_script_nonce_injector.rb:12:in `call'
config/initializers/008-rack-cors.rb:26:in `call'
rack (2.2.13) lib/rack/session/abstract/id.rb:266:in `context'
rack (2.2.13) lib/rack/session/abstract/id.rb:260:in `call'
actionpack (7.2.2.1) lib/action_dispatch/middleware/cookies.rb:704:in `call'
actionpack (7.2.2.1) lib/action_dispatch/middleware/callbacks.rb:31:in `block in call'
activesupport (7.2.2.1) lib/active_support/callbacks.rb:101:in `run_callbacks'
actionpack (7.2.2.1) lib/action_dispatch/middleware/callbacks.rb:30:in `call'
actionpack (7.2.2.1) lib/action_dispatch/middleware/debug_exceptions.rb:31:in `call'
actionpack (7.2.2.1) lib/action_dispatch/middleware/show_exceptions.rb:32:in `call'
logster (2.20.1) lib/logster/middleware/reporter.rb:40:in `call'
lib/middleware/default_headers.rb:13:in `call'
lograge (0.14.0) lib/lograge/rails_ext/rack/logger.rb:18:in `call_app'
railties (7.2.2.1) lib/rails/rack/logger.rb:29:in `call'
config/initializers/100-quiet_logger.rb:20:in `call'
config/initializers/100-silence_logger.rb:29:in `call'
actionpack (7.2.2.1) lib/action_dispatch/middleware/request_id.rb:33:in `call'
lib/middleware/enforce_hostname.rb:24:in `call'
rack (2.2.13) lib/rack/method_override.rb:24:in `call'
rack (2.2.13) lib/rack/sendfile.rb:110:in `call'
plugins/discourse-prometheus/lib/middleware/metrics.rb:14:in `call'
rack-mini-profiler (3.3.1) lib/mini_profiler.rb:191:in `call'
lib/middleware/processing_request.rb:12:in `call'
message_bus (4.4.1) lib/message_bus/rack/middleware.rb:60:in `call'
lib/middleware/request_tracker.rb:385:in `call'
actionpack (7.2.2.1) lib/action_dispatch/middleware/remote_ip.rb:96:in `call'
rails_failover (2.2.0) lib/rails_failover/active_record/middleware.rb:67:in `block in call'
activerecord (7.2.2.1) lib/active_record/connection_handling.rb:376:in `with_role_and_shard'
activerecord (7.2.2.1) lib/active_record/connection_handling.rb:147:in `connected_to'
rails_failover (2.2.0) lib/rails_failover/active_record/middleware.rb:64:in `call'
rails_multisite (6.1.0) lib/rails_multisite/middleware.rb:26:in `call'
railties (7.2.2.1) lib/rails/engine.rb:535:in `call'
railties (7.2.2.1) lib/rails/railtie.rb:226:in `public_send'
railties (7.2.2.1) lib/rails/railtie.rb:226:in `method_missing'
rack (2.2.13) lib/rack/urlmap.rb:74:in `block in call'
rack (2.2.13) lib/rack/urlmap.rb:58:in `each'
rack (2.2.13) lib/rack/urlmap.rb:58:in `call'
unicorn (6.1.0) lib/unicorn/http_server.rb:634:in `process_client'
unicorn (6.1.0) lib/unicorn/http_server.rb:739:in `worker_loop'
unicorn (6.1.0) lib/unicorn/http_server.rb:547:in `spawn_missing_workers'
unicorn (6.1.0) lib/unicorn/http_server.rb:143:in `start'
unicorn (6.1.0) bin/unicorn:128:in `<top (required)>'
vendor/bundle/ruby/3.3.0/bin/unicorn:25:in `load'
vendor/bundle/ruby/3.3.0/bin/unicorn:25:in `<main>'

補足：

• 以前も述べたように、flag reasons はカスタムフラグでは機能しません