Solved topic cannot be loaded

Don · March 26, 2025, 1:33pm

Hello

On my site we have some solved topics which cannot be loaded.

Message (2 copies reported)

NoMethodError (undefined method `user' for nil)
app/controllers/application_controller.rb:506:in `render_json_dump'
app/controllers/topics_controller.rb:1387:in `block (2 levels) in perform_show_response'
app/controllers/topics_controller.rb:1377:in `perform_show_response'
app/controllers/topics_controller.rb:191:in `show'
app/controllers/application_controller.rb:427:in `block in with_resolved_locale'
app/controllers/application_controller.rb:427: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:410: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'

Backtrace

plugins/discourse-solved/lib/discourse_solved/topic_view_serializer_extension.rb:21:in `accepted_answer_post_info'
plugins/discourse-solved/lib/discourse_solved/topic_view_serializer_extension.rb:13:in `accepted_answer'
(eval at /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/active_model_serializers-0.8.4/lib/active_model/serializer.rb:467):75:in `_fast_attributes'
active_model_serializers (0.8.4) lib/active_model/serializer.rb:468:in `rescue in attributes'
active_model_serializers (0.8.4) lib/active_model/serializer.rb:455:in `attributes'
active_model_serializers (0.8.4) lib/active_model/serializer.rb:480:in `_serializable_hash'
active_model_serializers (0.8.4) lib/active_model/serializer.rb:359:in `serializable_hash'
active_model_serializers (0.8.4) lib/active_model/serializer.rb:347:in `as_json'
activesupport (7.2.2.1) lib/active_support/json/encoding.rb:23:in `encode'
activesupport (7.2.2.1) lib/active_support/json/encoding.rb:23:in `encode'
activesupport (7.2.2.1) lib/active_support/core_ext/object/json.rb:42:in `to_json'
active_model_serializers (0.8.4) lib/active_model/serializer.rb:331:in `to_json'
multi_json (1.15.0) lib/multi_json/adapters/oj.rb:56:in `dump'
multi_json (1.15.0) lib/multi_json/adapters/oj.rb:56:in `dump'
multi_json (1.15.0) lib/multi_json/adapter.rb:25:in `dump'
multi_json (1.15.0) lib/multi_json.rb:139:in `dump'
app/controllers/application_controller.rb:506:in `render_json_dump'
app/controllers/topics_controller.rb:1387:in `block (2 levels) in perform_show_response'
actionpack (7.2.2.1) lib/action_controller/metal/mime_responds.rb:224:in `respond_to'
app/controllers/topics_controller.rb:1377:in `perform_show_response'
app/controllers/topics_controller.rb:191:in `show'
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:427:in `block in with_resolved_locale'
i18n (1.14.7) lib/i18n.rb:353:in `with_locale'
app/controllers/application_controller.rb:427: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:115: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:27: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:410: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'
railties (7.2.2.1) lib/rails/rack/logger.rb:41: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'
actionpack (7.2.2.1) lib/action_dispatch/middleware/executor.rb:16:in `call'
rack (2.2.13) lib/rack/sendfile.rb:110:in `call'
rack-mini-profiler (3.3.1) lib/mini_profiler.rb:334: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'
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>'

That’s odd the other solved topics are loads fine. I tried to looking for a pattern why but seems there is nothing special. I tried it with safe mode too but the issue is still exist.

It’s maybe related with this update: FEATURE: Add setting to show who marked as solved by nattsw · Pull Request #347 · discourse/discourse-solved · GitHub

Thank you

Arkshine · March 26, 2025, 2:45pm

Does enabling the show_who_marked_solved setting allow the posts to load?

Don · March 26, 2025, 2:49pm

I tried that too but unfortunately no.

Don · March 26, 2025, 4:52pm

So It seems the issue happens when the user (who has the accepted answer in the topic) has been deleted and the accepted post is also removed.

david · March 26, 2025, 5:30pm

Thanks! We’ll get this sorted

nat · March 26, 2025, 5:55pm

This has been fixed here: FIX: Some solved topics have no answers by nattsw · Pull Request #350 · discourse/discourse-solved · GitHub

Extra note:

When using custom fields, there are very little validations available so marked answers may be dangling, leading to posts that do not exist, or topics pointing to the same post.

We just moved discourse-solved away from using custom fields into proper tables, and there had been some assumptions made like each post should only be an answer to a topic, or a topic with an answer must point to a non-null post. All these assumptions were thrown out of the window

nat · March 31, 2025, 12:00am

This topic was automatically closed after 4 days. New replies are no longer allowed.

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