このケースを考えてみてください:
-
tl1 ユーザーが、複数のリンクを含む返信を投稿しました。
-
ユーザーの行動に基づき、管理者はその信頼レベルを 0 に固定し、すべての投稿の承認が必要になるようにしました。
-
その後、そのユーザーの過去の投稿に適切なフラグが付けられました。管理者はフラグに同意したいのですが、
422 エラーが発生してできません。 -
ユーザーの信頼レベルが 1 に戻らない限り、フラグに同意することはできません。なぜなら、投稿には複数のリンクが含まれており（それはユーザーの制限を超えているため）。
なぜこのようなことが起きているのか理解できます。ユーザーの信頼レベルを降格させるプロセスにどこかエラーがあるはずです。しかし、フラグを受け入れる段階でエラーが発生するのは問題です（なぜシステムがモデレーターにフラグを適用することを許可しないのか、モデレーターが混乱していたのはそのためです）。
管理パネルの完全なエラー記録
完全なエラー記録:
ActiveRecord::RecordInvalid (Validation failed: Sorry, new users can only include 2 links per post.)
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.3/lib/active_record/validations.rb:80:in `raise_validation_error'
そしてこれ:
activerecord-6.0.3/lib/active_record/validations.rb:80:in `raise_validation_error'
activerecord-6.0.3/lib/active_record/validations.rb:53:in `save!'
activerecord-6.0.3/lib/active_record/transactions.rb:318:in `block in save!'
activerecord-6.0.3/lib/active_record/transactions.rb:375:in `block in with_transaction_returning_status'
activerecord-6.0.3/lib/active_record/connection_adapters/abstract/database_statements.rb:278:in `transaction'
activerecord-6.0.3/lib/active_record/transactions.rb:212:in `transaction'
activerecord-6.0.3/lib/active_record/transactions.rb:366:in `with_transaction_returning_status'
activerecord-6.0.3/lib/active_record/transactions.rb:318:in `save!'
activerecord-6.0.3/lib/active_record/suppressor.rb:48:in `save!'
/var/www/discourse/app/models/post.rb:524:in `hide!'
/var/www/discourse/app/models/reviewable_flagged_post.rb:155:in `block in perform_agree_and_hide'
/var/www/discourse/app/models/reviewable_flagged_post.rb:264:in `agree'
/var/www/discourse/app/models/reviewable_flagged_post.rb:154:in `perform_agree_and_hide'
/var/www/discourse/app/models/reviewable.rb:355:in `public_send'
/var/www/discourse/app/models/reviewable.rb:355:in `block in perform'
activerecord-6.0.3/lib/active_record/connection_adapters/abstract/database_statements.rb:280:in `block in transaction'
activerecord-6.0.3/lib/active_record/connection_adapters/abstract/transaction.rb:280:in `block in within_new_transaction'
activesupport-6.0.3/lib/active_support/concurrency/load_interlock_aware_monitor.rb:26:in `block (2 levels) in synchronize'
activesupport-6.0.3/lib/active_support/concurrency/load_interlock_aware_monitor.rb:25:in `handle_interrupt'
activesupport-6.0.3/lib/active_support/concurrency/load_interlock_aware_monitor.rb:25:in `block in synchronize'
activesupport-6.0.3/lib/active_support/concurrency/load_interlock_aware_monitor.rb:21:in `handle_interrupt'
activesupport-6.0.3/lib/active_support/concurrency/load_interlock_aware_monitor.rb:21:in `synchronize'
activerecord-6.0.3/lib/active_record/connection_adapters/abstract/transaction.rb:278:in `within_new_transaction'
activerecord-6.0.3/lib/active_record/connection_adapters/abstract/database_statements.rb:280:in `transaction'
activerecord-6.0.3/lib/active_record/transactions.rb:212:in `transaction'
/var/www/discourse/app/models/reviewable.rb:353:in `perform'
/var/www/discourse/app/controllers/reviewables_controller.rb:188:in `perform'
actionpack-6.0.3/lib/action_controller/metal/basic_implicit_render.rb:6:in `send_action'
actionpack-6.0.3/lib/abstract_controller/base.rb:195:in `process_action'
actionpack-6.0.3/lib/action_controller/metal/rendering.rb:30:in `process_action'
actionpack-6.0.3/lib/abstract_controller/callbacks.rb:42:in `block in process_action'
activesupport-6.0.3/lib/active_support/callbacks.rb:135:in `run_callbacks'
actionpack-6.0.3/lib/abstract_controller/callbacks.rb:41:in `process_action'
actionpack-6.0.3/lib/action_controller/metal/rescue.rb:22:in `process_action'
actionpack-6.0.3/lib/action_controller/metal/instrumentation.rb:33:in `block in process_action'
activesupport-6.0.3/lib/active_support/notifications.rb:180:in `block in instrument'
activesupport-6.0.3/lib/active_support/notifications/instrumenter.rb:24:in `instrument'
activesupport-6.0.3/lib/active_support/notifications.rb:180:in `instrument'
actionpack-6.0.3/lib/action_controller/metal/instrumentation.rb:32:in `process_action'
actionpack-6.0.3/lib/action_controller/metal/params_wrapper.rb:245:in `process_action'
activerecord-6.0.3/lib/active_record/railties/controller_runtime.rb:27:in `process_action'
actionpack-6.0.3/lib/abstract_controller/base.rb:136:in `process'
actionview-6.0.3/lib/action_view/rendering.rb:39:in `process'
rack-mini-profiler-2.0.1/lib/mini_profiler/profiling_methods.rb:104:in `block in profile_method'
actionpack-6.0.3/lib/action_controller/metal.rb:190:in `dispatch'
actionpack-6.0.3/lib/action_controller/metal.rb:254:in `dispatch'
actionpack-6.0.3/lib/action_dispatch/routing/route_set.rb:50:in `dispatch'
actionpack-6.0.3/lib/action_dispatch/routing/route_set.rb:33:in `serve'
actionpack-6.0.3/lib/action_dispatch/journey/router.rb:49:in `block in serve'
actionpack-6.0.3/lib/action_dispatch/journey/router.rb:32:in `each'
actionpack-6.0.3/lib/action_dispatch/journey/router.rb:32:in `serve'
actionpack-6.0.3/lib/action_dispatch/routing/route_set.rb:834:in `call'
/var/www/discourse/lib/middleware/omniauth_bypass_middleware.rb:68:in `call'
rack-2.0.8/lib/rack/tempfile_reaper.rb:15:in `call'
rack-2.0.8/lib/rack/conditional_get.rb:38:in `call'
rack-2.0.8/lib/rack/head.rb:12:in `call'
/var/www/discourse/lib/content_security_policy/middleware.rb:12:in `call'
/var/www/discourse/lib/middleware/anonymous_cache.rb:318:in `call'
rack-2.0.8/lib/rack/session/abstract/id.rb:259:in `context'
rack-2.0.8/lib/rack/session/abstract/id.rb:253:in `call'
actionpack-6.0.3/lib/action_dispatch/middleware/cookies.rb:648:in `call'
actionpack-6.0.3/lib/action_dispatch/middleware/callbacks.rb:27:in `block in call'
activesupport-6.0.3/lib/active_support/callbacks.rb:101:in `run_callbacks'
actionpack-6.0.3/lib/action_dispatch/middleware/callbacks.rb:26:in `call'
actionpack-6.0.3/lib/action_dispatch/middleware/actionable_exceptions.rb:17:in `call'
actionpack-6.0.3/lib/action_dispatch/middleware/debug_exceptions.rb:32:in `call'
actionpack-6.0.3/lib/action_dispatch/middleware/show_exceptions.rb:33:in `call'
logster-2.8.0/lib/logster/middleware/reporter.rb:43:in `call'
railties-6.0.3/lib/rails/rack/logger.rb:37:in `call_app'
railties-6.0.3/lib/rails/rack/logger.rb:28:in `call'
/var/www/discourse/config/initializers/100-quiet_logger.rb:18:in `call'
/var/www/discourse/config/initializers/100-silence_logger.rb:31:in `call'
actionpack-6.0.3/lib/action_dispatch/middleware/remote_ip.rb:81:in `call'
actionpack-6.0.3/lib/action_dispatch/middleware/request_id.rb:27:in `call'
/var/www/discourse/lib/middleware/enforce_hostname.rb:22:in `call'
rack-2.0.8/lib/rack/method_override.rb:22:in `call'
actionpack-6.0.3/lib/action_dispatch/middleware/executor.rb:14:in `call'
rack-2.0.8/lib/rack/sendfile.rb:111:in `call'
actionpack-6.0.3/lib/action_dispatch/middleware/host_authorization.rb:76:in `call'
rack-mini-profiler-2.0.1/lib/mini_profiler/profiler.rb:312:in `call'
message_bus-3.2.0/lib/message_bus/rack/middleware.rb:57:in `call'
/var/www/discourse/lib/middleware/request_tracker.rb:172:in `call'
railties-6.0.3/lib/rails/engine.rb:527:in `call'
railties-6.0.3/lib/rails/railtie.rb:190:in `public_send'
railties-6.0.3/lib/rails/railtie.rb:190:in `method_missing'
rack-2.0.8/lib/rack/urlmap.rb:68:in `block in call'
rack-2.0.8/lib/rack/urlmap.rb:53:in `each'
rack-2.0.8/lib/rack/urlmap.rb:53:in `call'
unicorn-5.5.5/lib/unicorn/http_server.rb:605:in `process_client'
unicorn-5.5.5/lib/unicorn/http_server.rb:701:in `worker_loop'
unicorn-5.5.5/lib/unicorn/http_server.rb:548:in `spawn_missing_workers'
unicorn-5.5.5/lib/unicorn/http_server.rb:144:in `start'
unicorn-5.5.5/bin/unicorn:128:in `<top (required)>'
/var/www/discourse/vendor/bundle/ruby/2.6.0/bin/unicorn:23:in `load'
/var/www/discourse/vendor/bundle/ruby/2.6.0/bin/unicorn:23:in `<main>'