Has many :through with alias association fails. about cache-machine

[kevgo]

Strange, that code has been working for a long time. Do you have a unit test to reproduce the failure?

[einzige]

I thought the problem is what we use polymorphic association:
https://github.com/partyearth/cache-machine/blob/development/spec/lib/cache_machine_spec.rb#L104

[einzige]

I can not understand:
NoMethodError (undefined method klass' for nil:NilClass): activesupport (3.0.7) lib/active_support/whiny_nil.rb:48:inmethod_missing'
activerecord (3.0.7) lib/active_record/reflection.rb:346:in source_reflection' activerecord (3.0.7) lib/active_record/reflection.rb:346:incollect'
activerecord (3.0.7) lib/active_record/reflection.rb:346:in source_reflection' activerecord (3.0.7) lib/active_record/reflection.rb:407:inderive_class_name'
activerecord (3.0.7) lib/active_record/reflection.rb:121:in class_name' activerecord (3.0.7) lib/active_record/reflection.rb:162:inklass'
/home/szinin/.rvm/gems/ruby-1.8.7-p334@pe/bundler/gems/cache-machine-15233080c651/lib/cache-machine.rb:180:in hook_cache_machine_on' /home/szinin/.rvm/gems/ruby-1.8.7-p334@pe/bundler/gems/cache-machine-15233080c651/lib/cache-machine.rb:158:inhas_many'
lib/active_record/log_machine.rb:74:in `has_many'

case (reflection = (target_class = self).reflect_on_association association_id)
when ActiveRecord::Reflection::ThroughReflection
   # ERROR HERE
  reflection.klass.after_save { target_class.delete_association_cache_on self, association_id }
  ...

How reflection can be nil if when block catched it as ActiveRecord::Reflection::ThroughReflection?

[einzige]

That was an association error in external repo.