Bug #17555: subclasses method in 2.7.2 is buggy

• Status: Rejected
• Assignee: -
• Target version: -
• ruby -v: ruby 2.7.2p137 (2020-10-01 revision 5445e04352) [x86_64-darwin19]
• Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN

[RedOne (Mark Morgan)]

I am finding that the subclasses method in 2.7.2 gives a faulty result, containing only one of the many subclasses in my system. Example, running 2.7.0 first, then 2.7.2:

mark@MacBook-Pro-2 my-project-rails5 % rvm use ruby-2.7.0
Using /Users/mark/.rvm/gems/ruby-2.7.0
mark@MacBook-Pro-2 my-project-rails5 % rails c
Warning: the running version of Bundler (2.1.2) is older than the version that created the lockfile (2.2.3). We suggest you to upgrade to the version that created the lockfile by running gem install bundler:2.2.3.
Running via Spring preloader in process 14701
Loading development environment (Rails 6.0.3.4)
2.7.0 :001 > ApplicationRecord.subclasses
=> [User (call 'User.connection' to establish a connection), AeEntry (call 'AeEntry.connection' to establish a connection), AeSystem (call 'AeSystem.connection' to establish a connection), Criticality (call 'Criticality.connection' to establish a connection), Diagnosis (call 'Diagnosis.connection' to establish a connection), Dosage (call 'Dosage.connection' to establish a connection), Event (call 'Event.connection' to establish a connection), EventNote (call 'EventNote.connection' to establish a connection), EventNoteType (call 'EventNoteType.connection' to establish a connection), EventSeries (call 'EventSeries.connection' to establish a connection), Medication (call 'Medication.connection' to establish a connection), MedicationSubstance (call 'MedicationSubstance.connection' to establish a connection), Outcome (call 'Outcome.connection' to establish a connection), Patient (call 'Patient.connection' to establish a connection), Practice (call 'Practice.connection' to establish a connection), Prescriber (call 'Prescriber.connection' to establish a connection), Protocol (call 'Protocol.connection' to establish a connection), ProtocolEntry (call 'ProtocolEntry.connection' to establish a connection), ResponseCodeForEvent (call 'ResponseCodeForEvent.connection' to establish a connection), Result (call 'Result.connection' to establish a connection), ResultType (call 'ResultType.connection' to establish a connection), Specialty (call 'Specialty.connection' to establish a connection)]
2.7.0 :002 > quit
mark@MacBook-Pro-2 my-project-rails5 % ruby -v
ruby 2.7.0p0 (2019-12-25 revision 647ee6f091) [x86_64-darwin19]
mark@MacBook-Pro-2 my-project-rails5 % rvm use ruby-2.7.2
Using /Users/mark/.rvm/gems/ruby-2.7.2
mark@MacBook-Pro-2 my-project-rails5 % rails c
Warning: the running version of Bundler (2.1.4) is older than the version that created the lockfile (2.2.3). We suggest you to upgrade to the version that created the lockfile by running gem install bundler:2.2.3.
Running via Spring preloader in process 14897
Loading development environment (Rails 6.0.3.4)
2.7.2 :001 > ApplicationRecord.subclasses
=> [User (call 'User.connection' to establish a connection)]
2.7.2 :002 >
mark@MacBook-Pro-2 my-project-rails5 % ruby -v
ruby 2.7.2p137 (2020-10-01 revision 5445e04352) [x86_64-darwin19]
mark@MacBook-Pro-2 my-project-rails5 % cat app/models/diagnosis.rb

frozen_string_literal: true

class Diagnosis < ApplicationRecord
end

[RedOne (Mark Morgan)]

• ruby -v set to ruby 2.7.2p137 (2020-10-01 revision 5445e04352) [x86_64-darwin19]

mark@MacBook-Pro-2 my-project-rails5 % rvm use ruby-2.7.0
Using /Users/mark/.rvm/gems/ruby-2.7.0
mark@MacBook-Pro-2 my-project-rails5 % rails c
Warning: the running version of Bundler (2.1.2) is older than the version that created the lockfile (2.2.3). We suggest you to upgrade to the version that created the lockfile by running gem install bundler:2.2.3.
Running via Spring preloader in process 14701
Loading development environment (Rails 6.0.3.4)
2.7.0 :001 > ApplicationRecord.subclasses
=> [User (call 'User.connection' to establish a connection), AeEntry (call 'AeEntry.connection' to establish a connection), AeSystem (call 'AeSystem.connection' to establish a connection), Criticality (call 'Criticality.connection' to establish a connection), Diagnosis (call 'Diagnosis.connection' to establish a connection), Dosage (call 'Dosage.connection' to establish a connection), Event (call 'Event.connection' to establish a connection), EventNote (call 'EventNote.connection' to establish a connection), EventNoteType (call 'EventNoteType.connection' to establish a connection), EventSeries (call 'EventSeries.connection' to establish a connection), Medication (call 'Medication.connection' to establish a connection), MedicationSubstance (call 'MedicationSubstance.connection' to establish a connection), Outcome (call 'Outcome.connection' to establish a connection), Patient (call 'Patient.connection' to establish a connection), Practice (call 'Practice.connection' to establish a connection), Prescriber (call 'Prescriber.connection' to establish a connection), Protocol (call 'Protocol.connection' to establish a connection), ProtocolEntry (call 'ProtocolEntry.connection' to establish a connection), ResponseCodeForEvent (call 'ResponseCodeForEvent.connection' to establish a connection), Result (call 'Result.connection' to establish a connection), ResultType (call 'ResultType.connection' to establish a connection), Specialty (call 'Specialty.connection' to establish a connection)]
2.7.0 :002 > quit
mark@MacBook-Pro-2 my-project-rails5 % ruby -v
ruby 2.7.0p0 (2019-12-25 revision 647ee6f091) [x86_64-darwin19]

mark@MacBook-Pro-2 my-project-rails5 % rvm use ruby-2.7.2
Using /Users/mark/.rvm/gems/ruby-2.7.2
mark@MacBook-Pro-2 my-project-rails5 % rails c
Warning: the running version of Bundler (2.1.4) is older than the version that created the lockfile (2.2.3). We suggest you to upgrade to the version that created the lockfile by running gem install bundler:2.2.3.
Running via Spring preloader in process 14897
Loading development environment (Rails 6.0.3.4)
2.7.2 :001 > ApplicationRecord.subclasses
=> [User (call 'User.connection' to establish a connection)]
2.7.2 :002 >
mark@MacBook-Pro-2 my-project-rails5 % ruby -v
ruby 2.7.2p137 (2020-10-01 revision 5445e04352) [x86_64-darwin19]
mark@MacBook-Pro-2 my-project-rails5 % cat app/models/diagnosis.rb

frozen_string_literal: true

class Diagnosis < ApplicationRecord
end

[byroot (Jean Boussier)]

subclasses is provided by rails not Ruby.

Also it's not a bug, simply a known behavior. Rails's subclass method can only list loaded classes, you are testing in autoload mode.

[marcandre (Marc-Andre Lafortune)]

• Status changed from Open to Rejected