Posted over 8 years ago. Visible to the public.

Fixing "A copy of Klass has been removed from the module tree but is still active"

This can happen during development when classes without automatic reloading are pointing to classes with automatic reloading. E.g. some class in lib is calling Model.static_method.

Workaround A

Stop referencing autoloaded classes from static files. If you can't, see workaround B and C.

Workaround B

Make sure the offending file (the one referencing the autoloaded class) is autoloaded, too. You may do this:

# config/application.rb config.paths.add 'offending/file/parent/directory', eager_load: true

Workaround C

If possible, make the autoloaded class static by moving it out of Rails' load path.

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Owner of this card:

Henning Koch
Last edit:
over 2 years ago
by Henning Koch
cache, classes, class
About this deck:
We are makandra and do test-driven, agile Ruby on Rails software development.
License for source code
Posted by Henning Koch to makandra dev
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