AbstractController::Helpers::MissingHelperError Ruby on Rails 5.1.2 Class AbstractController::Helpers::MissingHelperError < LoadError actionpack/lib/abstract_controller/helpers.rb Methods N new Class Public methods new(error, path) Link Source: show | on GitHub # File actionpack/lib/abstract_controller/helpers.rb, line 16 def initialize(error, path) @error = error @path = "helpers/#{path}.rb" set_backtrace error.backtrace if error.path =~ /^#{path}(\.rb)?$/ super("Missing helper file helpers/%s.rb" % path) else raise error end end