Polls plugin causing 500 error on post save

dev
1

On the latest version of Discourse on Docker I’m having the reverse of this issue: Polls disabled caused 500 error

If polls are enabled replying to a topic shows a 500 error. Trace:

NoMethodError in PostsController#create

undefined method `polls' for #<Post:0x00007fa2b3502050>
Extracted source (around line #431):

#429       else
#430         match = matched_attribute_method(method.to_s)
*431         match ? attribute_missing(match, *args, &block) : super
#432       end
#433     end
#434 

Extracted source (around line #552):

#550 
#551     unless post.is_first_post?
*552       polls = ActiveModel::ArraySerializer.new(post.polls, each_serializer: PollSerializer, root: false, scope: guardian).as_json
#553       post.publish_message!("/polls/#{post.topic_id}", post_id: post.id, polls: polls)
#554     end
#555   end

Extracted source (around line #326):

#324   def on(event_name, &block)
#325     DiscourseEvent.on(event_name) do |*args|
*326       block.call(*args) if enabled?
#327     end
#328   end
#329 


Rails.root: /src

Application Trace
lib/plugin/instance.rb:326:in `block in on'
lib/discourse_event.rb:14:in `block in trigger'
lib/discourse_event.rb:13:in `trigger'
lib/post_creator.rb:239:in `trigger_after_events'
lib/post_creator.rb:208:in `create'
lib/new_post_manager.rb:271:in `perform_create_post'
lib/new_post_manager.rb:209:in `perform'
app/controllers/posts_controller.rb:179:in `create'
lib/middleware/omniauth_bypass_middleware.rb:68:in `call'
lib/content_security_policy/middleware.rb:12:in `call'
config/initializers/100-quiet_logger.rb:18:in `call'
config/initializers/100-silence_logger.rb:31:in `call'
lib/middleware/missing_avatars.rb:23:in `call'
lib/middleware/turbo_dev.rb:34:in `call'

Framework Trace
activemodel (6.0.1) lib/active_model/attribute_methods.rb:431:in `method_missing'
plugins/poll/plugin.rb:552:in `block (2 levels) in activate!'
/usr/local/lib/ruby/2.6.0/set.rb:338:in `each_key'
/usr/local/lib/ruby/2.6.0/set.rb:338:in `each'
actionpack (6.0.1) lib/action_controller/metal/basic_implicit_render.rb:6:in `send_action'
actionpack (6.0.1) lib/abstract_controller/base.rb:196:in `process_action'
actionpack (6.0.1) lib/action_controller/metal/rendering.rb:30:in `process_action'
actionpack (6.0.1) lib/abstract_controller/callbacks.rb:42:in `block in process_action'
activesupport (6.0.1) lib/active_support/callbacks.rb:135:in `run_callbacks'
actionpack (6.0.1) lib/abstract_controller/callbacks.rb:41:in `process_action'
actionpack (6.0.1) lib/action_controller/metal/rescue.rb:22:in `process_action'
actionpack (6.0.1) lib/action_controller/metal/instrumentation.rb:33:in `block in process_action'
activesupport (6.0.1) lib/active_support/notifications.rb:180:in `block in instrument'
activesupport (6.0.1) lib/active_support/notifications/instrumenter.rb:24:in `instrument'
activesupport (6.0.1) lib/active_support/notifications.rb:180:in `instrument'
actionpack (6.0.1) lib/action_controller/metal/instrumentation.rb:32:in `process_action'
actionpack (6.0.1) lib/action_controller/metal/params_wrapper.rb:245:in `process_action'
activerecord (6.0.1) lib/active_record/railties/controller_runtime.rb:27:in `process_action'
actionpack (6.0.1) lib/abstract_controller/base.rb:136:in `process'
actionview (6.0.1) 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 (6.0.1) lib/action_controller/metal.rb:191:in `dispatch'
actionpack (6.0.1) lib/action_controller/metal.rb:252:in `dispatch'
actionpack (6.0.1) lib/action_dispatch/routing/route_set.rb:51:in `dispatch'
actionpack (6.0.1) lib/action_dispatch/routing/route_set.rb:33:in `serve'
actionpack (6.0.1) lib/action_dispatch/journey/router.rb:49:in `block in serve'
actionpack (6.0.1) lib/action_dispatch/journey/router.rb:32:in `each'
actionpack (6.0.1) lib/action_dispatch/journey/router.rb:32:in `serve'
actionpack (6.0.1) lib/action_dispatch/routing/route_set.rb:837: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'
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 (6.0.1) lib/action_dispatch/middleware/cookies.rb:648:in `call'
activerecord (6.0.1) lib/active_record/migration.rb:567:in `call'
actionpack (6.0.1) lib/action_dispatch/middleware/callbacks.rb:27:in `block in call'
activesupport (6.0.1) lib/active_support/callbacks.rb:101:in `run_callbacks'
actionpack (6.0.1) lib/action_dispatch/middleware/callbacks.rb:26:in `call'
actionpack (6.0.1) lib/action_dispatch/middleware/executor.rb:14:in `call'
actionpack (6.0.1) lib/action_dispatch/middleware/actionable_exceptions.rb:17:in `call'
actionpack (6.0.1) lib/action_dispatch/middleware/debug_exceptions.rb:32:in `call'
actionpack (6.0.1) lib/action_dispatch/middleware/show_exceptions.rb:33:in `call'
logster (2.7.1) lib/logster/middleware/reporter.rb:43:in `call'
railties (6.0.1) lib/rails/rack/logger.rb:38:in `call_app'
railties (6.0.1) lib/rails/rack/logger.rb:28:in `call'
actionpack (6.0.1) lib/action_dispatch/middleware/remote_ip.rb:81:in `call'
actionpack (6.0.1) lib/action_dispatch/middleware/request_id.rb:27:in `call'
rack (2.0.8) lib/rack/method_override.rb:22:in `call'
actionpack (6.0.1) lib/action_dispatch/middleware/executor.rb:14:in `call'
actionpack (6.0.1) lib/action_dispatch/middleware/static.rb:126:in `call'
rack (2.0.8) lib/rack/sendfile.rb:111:in `call'
actionpack (6.0.1) lib/action_dispatch/middleware/host_authorization.rb:83:in `call'
rack-mini-profiler (2.0.1) lib/mini_profiler/profiler.rb:312:in `call'
message_bus (2.2.4) lib/message_bus/rack/middleware.rb:57:in `call'
railties (6.0.1) lib/rails/engine.rb:526:in `call'
railties (6.0.1) lib/rails/railtie.rb:190:in `public_send'
railties (6.0.1) 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 (5.5.4) lib/unicorn/http_server.rb:605:in `process_client'
unicorn (5.5.4) lib/unicorn/http_server.rb:700:in `worker_loop'
unicorn (5.5.4) lib/unicorn/http_server.rb:548:in `spawn_missing_workers'
unicorn (5.5.4) lib/unicorn/http_server.rb:144:in `start'
unicorn (5.5.4) bin/unicorn:128:in `<top (required)>'
bin/unicorn:87:in `load'
bin/unicorn:87:in `block in <main>'
bin/unicorn:86:in `fork'
bin/unicorn:86:in `<main>'

Full Trace
activemodel (6.0.1) lib/active_model/attribute_methods.rb:431:in `method_missing'
plugins/poll/plugin.rb:552:in `block (2 levels) in activate!'
lib/plugin/instance.rb:326:in `block in on'
lib/discourse_event.rb:14:in `block in trigger'
/usr/local/lib/ruby/2.6.0/set.rb:338:in `each_key'
/usr/local/lib/ruby/2.6.0/set.rb:338:in `each'
lib/discourse_event.rb:13:in `trigger'
lib/post_creator.rb:239:in `trigger_after_events'
lib/post_creator.rb:208:in `create'
lib/new_post_manager.rb:271:in `perform_create_post'
lib/new_post_manager.rb:209:in `perform'
app/controllers/posts_controller.rb:179:in `create'
actionpack (6.0.1) lib/action_controller/metal/basic_implicit_render.rb:6:in `send_action'
actionpack (6.0.1) lib/abstract_controller/base.rb:196:in `process_action'
actionpack (6.0.1) lib/action_controller/metal/rendering.rb:30:in `process_action'
actionpack (6.0.1) lib/abstract_controller/callbacks.rb:42:in `block in process_action'
activesupport (6.0.1) lib/active_support/callbacks.rb:135:in `run_callbacks'
actionpack (6.0.1) lib/abstract_controller/callbacks.rb:41:in `process_action'
actionpack (6.0.1) lib/action_controller/metal/rescue.rb:22:in `process_action'
actionpack (6.0.1) lib/action_controller/metal/instrumentation.rb:33:in `block in process_action'
activesupport (6.0.1) lib/active_support/notifications.rb:180:in `block in instrument'
activesupport (6.0.1) lib/active_support/notifications/instrumenter.rb:24:in `instrument'
activesupport (6.0.1) lib/active_support/notifications.rb:180:in `instrument'
actionpack (6.0.1) lib/action_controller/metal/instrumentation.rb:32:in `process_action'
actionpack (6.0.1) lib/action_controller/metal/params_wrapper.rb:245:in `process_action'
activerecord (6.0.1) lib/active_record/railties/controller_runtime.rb:27:in `process_action'
actionpack (6.0.1) lib/abstract_controller/base.rb:136:in `process'
actionview (6.0.1) 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 (6.0.1) lib/action_controller/metal.rb:191:in `dispatch'
actionpack (6.0.1) lib/action_controller/metal.rb:252:in `dispatch'
actionpack (6.0.1) lib/action_dispatch/routing/route_set.rb:51:in `dispatch'
actionpack (6.0.1) lib/action_dispatch/routing/route_set.rb:33:in `serve'
actionpack (6.0.1) lib/action_dispatch/journey/router.rb:49:in `block in serve'
actionpack (6.0.1) lib/action_dispatch/journey/router.rb:32:in `each'
actionpack (6.0.1) lib/action_dispatch/journey/router.rb:32:in `serve'
actionpack (6.0.1) lib/action_dispatch/routing/route_set.rb:837:in `call'
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'
lib/content_security_policy/middleware.rb:12: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 (6.0.1) lib/action_dispatch/middleware/cookies.rb:648:in `call'
activerecord (6.0.1) lib/active_record/migration.rb:567:in `call'
actionpack (6.0.1) lib/action_dispatch/middleware/callbacks.rb:27:in `block in call'
activesupport (6.0.1) lib/active_support/callbacks.rb:101:in `run_callbacks'
actionpack (6.0.1) lib/action_dispatch/middleware/callbacks.rb:26:in `call'
actionpack (6.0.1) lib/action_dispatch/middleware/executor.rb:14:in `call'
actionpack (6.0.1) lib/action_dispatch/middleware/actionable_exceptions.rb:17:in `call'
actionpack (6.0.1) lib/action_dispatch/middleware/debug_exceptions.rb:32:in `call'
actionpack (6.0.1) lib/action_dispatch/middleware/show_exceptions.rb:33:in `call'
logster (2.7.1) lib/logster/middleware/reporter.rb:43:in `call'
railties (6.0.1) lib/rails/rack/logger.rb:38:in `call_app'
railties (6.0.1) lib/rails/rack/logger.rb:28:in `call'
config/initializers/100-quiet_logger.rb:18:in `call'
config/initializers/100-silence_logger.rb:31:in `call'
actionpack (6.0.1) lib/action_dispatch/middleware/remote_ip.rb:81:in `call'
actionpack (6.0.1) lib/action_dispatch/middleware/request_id.rb:27:in `call'
rack (2.0.8) lib/rack/method_override.rb:22:in `call'
actionpack (6.0.1) lib/action_dispatch/middleware/executor.rb:14:in `call'
actionpack (6.0.1) lib/action_dispatch/middleware/static.rb:126:in `call'
rack (2.0.8) lib/rack/sendfile.rb:111:in `call'
actionpack (6.0.1) lib/action_dispatch/middleware/host_authorization.rb:83:in `call'
lib/middleware/missing_avatars.rb:23:in `call'
lib/middleware/turbo_dev.rb:34:in `call'
rack-mini-profiler (2.0.1) lib/mini_profiler/profiler.rb:312:in `call'
message_bus (2.2.4) lib/message_bus/rack/middleware.rb:57:in `call'
railties (6.0.1) lib/rails/engine.rb:526:in `call'
railties (6.0.1) lib/rails/railtie.rb:190:in `public_send'
railties (6.0.1) 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 (5.5.4) lib/unicorn/http_server.rb:605:in `process_client'
unicorn (5.5.4) lib/unicorn/http_server.rb:700:in `worker_loop'
unicorn (5.5.4) lib/unicorn/http_server.rb:548:in `spawn_missing_workers'
unicorn (5.5.4) lib/unicorn/http_server.rb:144:in `start'
unicorn (5.5.4) bin/unicorn:128:in `<top (required)>'
bin/unicorn:87:in `load'
bin/unicorn:87:in `block in <main>'
bin/unicorn:86:in `fork'
bin/unicorn:86:in `<main>'
1 Like
4

Hi Ben, it seems like you are missing some database migrations from the polls plugin. Can you tell us more about how you have Discourse set up? Did you follow our standard installation guide?

4 Likes
6

A simple workaround here is:

cd /var/discourse
./launcher rebuild app

My guess is that somehow migrations did not fire correctly when you did an upgrade or restore.

7

Hey guys, I’m developing a plugin so I went the discourse_docker route. I’ve actually submitted a pr for the instructions there. There are a few other steps missing if you’d like to to elaborate. Up and running now with the polls plugin disabled - it doesn’t impact my testing.