Translator Plugin: NotPreloadedError

Contribute Bug

AI-generated summary

User ikarus84 reports a NotPreloadedError when using the Translator plugin with LibreTranslate on Bonn.Community, specifically when accessing the post_detected_lang custom field. The error occurs intermittently and persists after rebuilding. Sam Saffron suggests the issue may relate to recent plugin updates and asks if it’s new. ikarus84 confirms they weren’t actively using the plugin recently and discovered the issue while testing ActivityPub. Natalie T requests the plugin version, which is confirmed as 0.3.0 (commit 97edd7d). Natalie T replies that the error should be resolved in the latest update, as the plugin has migrated from custom fields to using dedicated translation tables. The issue appears to stem from legacy code accessing non-preloaded custom fields, now addressed in newer versions.

1

Hi there,
I am using the translator plugin with LibreTranslate on Bonn.Community. It works on certain articles, others gave me this error message.
I tried to rebuild, but that did not help.

HasCustomFields::NotPreloadedError (Attempted to access the non preloaded custom field 'post_detected_lang' on the 'Post' class. This is disallowed to prevent N+1 queries.) app/models/concerns/has_cus


app/models/concerns/has_custom_fields.rb:235:in `[]'
plugins/discourse-translator/lib/discourse_translator/guardian_extension.rb:30:in `can_translate?'
plugins/discourse-translator/plugin.rb:47:in `block (2 levels) in activate!'
(eval at /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/active_model_serializers-0.8.4/lib/active_model/serializer.rb:467):108:in `_fast_attributes'
active_model_serializers (0.8.4) lib/active_model/serializer.rb:456: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'
app/serializers/post_stream_serializer_mixin.rb:67:in `block in posts'
activerecord (7.2.2.1) lib/active_record/relation/delegation.rb:98:in `each'
activerecord (7.2.2.1) lib/active_record/relation/delegation.rb:98:in `each'
app/serializers/post_stream_serializer_mixin.rb:60:in `map'
app/serializers/post_stream_serializer_mixin.rb:60:in `posts'
app/serializers/post_stream_serializer_mixin.rb:31:in `post_stream'
(eval at /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/active_model_serializers-0.8.4/lib/active_model/serializer.rb:467):3:in `_fast_attributes'
active_model_serializers (0.8.4) lib/active_model/serializer.rb:456: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:528:in `render_json_dump'
app/controllers/topics_controller.rb:1385: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:1375: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:424:in `block in with_resolved_locale'
i18n (1.14.6) lib/i18n.rb:353:in `with_locale'
app/controllers/application_controller.rb:424: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:64:in `call'
rack (2.2.10) lib/rack/tempfile_reaper.rb:15:in `call'
rack (2.2.10) lib/rack/conditional_get.rb:27:in `call'
rack (2.2.10) 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:403:in `call'
lib/middleware/csp_script_nonce_injector.rb:12:in `call'
config/initializers/008-rack-cors.rb:26:in `call'
rack (2.2.10) lib/rack/session/abstract/id.rb:266:in `context'
rack (2.2.10) 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 (2.20.0) lib/logster/middleware/reporter.rb:40: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 (2.2.10) lib/rack/method_override.rb:24:in `call'
actionpack (7.2.2.1) lib/action_dispatch/middleware/executor.rb:16:in `call'
rack (2.2.10) 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 (4.3.8) 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 (2.2.10) lib/rack/urlmap.rb:74:in `block in call'
rack (2.2.10) lib/rack/urlmap.rb:58:in `each'
rack (2.2.10) 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>'
info backtrace env
1 Like
2

@nat recently worked on the plugin I wonder if this is related, we will have a look.

Is this issue new, was it working well previously?

2 Likes
4

Can you share which version of the plugin you’re on? You should be able to see the sha in your site’s /admin/plugins page, e.g. 97edd7d in the screenshot below.

Screenshot 2025-01-20 at 2.03.19 PM
Screenshot 2025-01-20 at 2.03.19 PM1908Ă—210 27.7 KB

6

Can’t say, as we weren’t actively using the plugin for a longer time.
I found out, when I was playing with the ActivityPub plugin.

0.3.0, 97edd7d

1 Like
7

This error should be fixed with the new update - We have moved away from custom fields and are using tables for translations now.

1 Like
8

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