Constant loading issue in development (with async-cable) #325
Description
Hey! Thanks for this gem, it's awesome! I've been using it in production just fine, but I'm having issues in development that are seemingly related to auto reloading and constant definitions.
Below logs a recurrent issue that causes 500s in my falcon responses occasionally... my current fix is to just stop and restart the server.
This app is using a standard async-cable + falcon setup on Rails 8.1 (ruby 3.4.7). The line in SetCurrentRequestDetails#set_request_details that is failing is just
Current.user = current_user (using current_user from Devise)
Completed 500 Internal Server Error in 5ms (ActiveRecord: 0.0ms (0 queries, 0 cached) | GC: 0.6ms)
NameError (uninitialized constant User):
app/controllers/concerns/set_current_request_details.rb:15:in 'SetCurrentRequestDetails#set_request_details'
Started GET "/cable" for ::1 at 2025-11-07 15:14:22 -0500
13h warn: Async::Cable::Middleware [oid=0x1462b8] [ec=0x174808] [pid=56717] [2025-11-07 15:14:22 -0500]
| Abnormal client failure!
| uninitialized constant User
| NameError: uninitialized constant User (NameError)
|
| Object.const_get(camel_cased_word)
| ^^^^^^^^^^
| Did you mean? Users
| → vendor/bundle/ruby/3.4.0/gems/activesupport-8.1.0.rc1/lib/active_support/inflector/methods.rb:290 in 'Module#const_get'
| vendor/bundle/ruby/3.4.0/gems/activesupport-8.1.0.rc1/lib/active_support/inflector/methods.rb:290 in 'ActiveSupport::Inflector#constantize'
| vendor/bundle/ruby/3.4.0/gems/activesupport-8.1.0.rc1/lib/active_support/core_ext/string/inflections.rb:74 in 'String#constantize'
| vendor/bundle/ruby/3.4.0/gems/devise-4.9.4/lib/devise.rb:327 in 'Devise::Getter#get'
| vendor/bundle/ruby/3.4.0/gems/devise-4.9.4/lib/devise/mapping.rb:83 in 'Devise::Mapping#to'
| vendor/bundle/ruby/3.4.0/gems/devise-4.9.4/lib/devise.rb:496 in 'block (2 levels) in Warden::SessionSerializer#configure_warden!'
| vendor/bundle/ruby/3.4.0/gems/warden-1.2.9/lib/warden/session_serializer.rb:35 in 'Warden::SessionSerializer#fetch'
| vendor/bundle/ruby/3.4.0/gems/warden-1.2.9/lib/warden/proxy.rb:224 in 'Warden::Proxy#user'
| app/channels/application_cable/connection.rb:21 in 'ApplicationCable::Connection#find_verified_user'
| app/channels/application_cable/connection.rb:11 in 'ApplicationCable::Connection#connect'
| vendor/bundle/ruby/3.4.0/gems/actioncable-next-0.2.0/lib/action_cable/connection/base.rb:92 in 'ActionCable::Connection::Base#handle_open'
| vendor/bundle/ruby/3.4.0/gems/async-cable-0.3.0/lib/async/cable/middleware.rb:44 in 'Async::Cable::Middleware#handle_incoming_websocket'
| vendor/bundle/ruby/3.4.0/gems/async-cable-0.3.0/lib/async/cable/middleware.rb:31 in 'block in Async::Cable::Middleware#call'
| vendor/bundle/ruby/3.4.0/gems/async-websocket-0.30.0/lib/async/websocket/adapters/http.rb:41 in 'block in Async::WebSocket::Adapters::HTTP.open'
| vendor/bundle/ruby/3.4.0/gems/async-http-0.91.0/lib/async/http/body/hijack.rb:39 in 'Async::HTTP::Body::Hijack#call'
| vendor/bundle/ruby/3.4.0/gems/rack-3.2.3/lib/rack/body_proxy.rb:56 in 'Method#call'
| vendor/bundle/ruby/3.4.0/gems/rack-3.2.3/lib/rack/body_proxy.rb:56 in 'Rack::BodyProxy#method_missing'
| vendor/bundle/ruby/3.4.0/gems/rack-3.2.3/lib/rack/body_proxy.rb:56 in 'Rack::BodyProxy#method_missing'
| vendor/bundle/ruby/3.4.0/gems/protocol-http-0.54.0/lib/protocol/http/body/streamable.rb:63 in 'block in Protocol::HTTP::Body::Streamable::Output#schedule'
| vendor/bundle/ruby/3.4.0/gems/async-2.34.0/lib/async/task.rb:207 in 'block in Async::Task#run'
| vendor/bundle/ruby/3.4.0/gems/async-2.34.0/lib/async/task.rb:452 in 'block in Async::Task#schedule'Happy to provide more info as we track this down.