Major - P3 When upgrading our mongoid version to 9.0 we started hitting errors when running bin/rails db:create_indexes
I have re-created the issue I am seeing with a fresh rails 8.0 app here on github to hopefully better illustrate the issue.
bin/rails aborted! NameError: uninitialized constant User::DisplayName (NameError) include DisplayName ^^^^^^^^^^^ /workspaces/mongoid-model-load-bug/app/models/user.rb:2:in `<class:User>' /workspaces/mongoid-model-load-bug/app/models/user.rb:1:in `<main>' /workspaces/mongoid-model-load-bug/app/models/concerns/user/display_name.rb:1:in `<main>' Tasks: TOP => db:create_indexes => db:mongoid:create_indexes => db:mongoid:load_models (See full trace by running task with --trace)
DB indexing in the 9.0 release changed the loading behavior. It is doing a .sort on the files which causes issues with loading when a model has a concern loaded before the model itself.
- https://github.com/mongodb/mongoid/pull/5526/files
- https://jira.mongodb.org/browse/MONGOID-5547
- 9.0 release notes: https://github.com/mongodb/mongoid/pull/5813
# https://github.com/jamis/mongoid/blob/master/lib/mongoid/loadable.rb def load_models(paths = model_paths) paths.each do |path| if preload_models.resizable? files = preload_models.map \{ |model| "#{path}/#\{model.underscore}.rb" } else files = Dir.glob("#\{path}/**/*.rb") end files.sort.each do |file| load_model(file.gsub(/^#\{path}\// , "").gsub(/\.rb$/, "")) end end end
In the repo if you pulled it down and run inside the devcontainer that is created, bin/rails db:create_indexes, it will fail on NameError: uninitialized constant User::DisplayName (NameError)