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Today I Learned

I’m almost always wanting to add configuration hooks to Rails engines when I build them. Up to this point I’ve never taken the time to figure out the most succinct way to provide configuration hooks. It turns out that it’s much simpler than I even imagined.

module MyGem
  class Engine < ::Rails::Engine
    isolate_namespace MyGem

    config.my_gem = ActiveSupport::OrderedOptions.new
    config.my_gem.some_setting = true

That’s it! Setting config directly in the class definition will expose the configuration in the consuming Rails application.