NameError: uninitialized constant ReactionsSerializerHelpers when loading topic posts

Ethsim2 · May 23, 2026, 12:21pm

I have opened a pull request for this here:

github.com/discourse/discourse

Fix reactions serializer helper loading (#40255)

main ← Ethsim12:fix-reactions-serializer-helpers-nameerror

opened 12:19PM - 23 May 26 UTC

Ethsim12

+379 -333

Tests run: bundle exec rubocop plugins/discourse-reactions/plugin.rb plugins/…discourse-reactions/lib/discourse_reactions/reactions_serializer_helpers.rb ruby -c plugins/discourse-reactions/plugin.rb ruby -c plugins/discourse-reactions/lib/discourse_reactions/reactions_serializer_helpers.rb LOAD_PLUGINS=1 bundle exec rspec plugins/discourse-reactions/spec --exclude-pattern "plugins/discourse-reactions/spec/system/**/*_spec.rb" Result: 183 examples, 0 failures. I also attempted the targeted system spec locally. After installing Playwright/Chromium dependencies, the browser opened a blank page and the app did not mount (`#main.ember-application` was not found), so I treated that as a local Codespaces system-test environment issue and left full system coverage to CI.

The change moves/loads ReactionsSerializerHelpers so it is available before PostsReactionLoader references it.

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NameError: uninitialized constant ReactionsSerializerHelpers when loading topic posts

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