Auto-loading lib files in Rails 4

Question

I use the following line in an initializer to autoload code in my /lib directory during development:

config/initializers/custom.rb:

Answer 1

This might help someone like me that finds this answer when searching for solutions to how Rails handles the class loading ... I found that I had to define a module whose name matched my filename appropriately, rather than just defining a class:

In file lib/development_mail_interceptor.rb (Yes, I'm using code from a Railscast :))

module DevelopmentMailInterceptor
  class DevelopmentMailInterceptor
    def self.delivering_email(message)
      message.subject = "intercepted for: #{message.to} #{message.subject}"
      message.to = "myemail@mydomain.org"
    end
  end
end

works, but it doesn't load if I hadn't put the class inside a module.