ActionMailer::Previews::ClassMethods
Methods
R
Instance Public methods
register_preview_interceptor(interceptor)

Register an Interceptor which will be called before mail is previewed. Either a class or a string can be passed in as the Interceptor. If a string is passed in it will be constantized.

Source: show | on GitHub 

# File actionmailer/lib/action_mailer/preview.rb, line 36
def register_preview_interceptor(interceptor)
  preview_interceptor =            case interceptor
    when String, Symbol
      interceptor.to_s.camelize.constantize
    else
      interceptor
    end

  unless preview_interceptors.include?(preview_interceptor)
    preview_interceptors << preview_interceptor
  end
end
register_preview_interceptors(*interceptors)

Register one or more Interceptors which will be called before mail is previewed.

Source: show | on GitHub 

# File actionmailer/lib/action_mailer/preview.rb, line 29
def register_preview_interceptors(*interceptors)
  interceptors.flatten.compact.each { |interceptor| register_preview_interceptor(interceptor) }
end