raise_generation_error

# File actionpack/lib/action_dispatch/routing/route_set.rb, line 214
            def raise_generation_error(args, missing_keys)
              constraints = Hash[@route.requirements.merge(args).sort]
              message = "No route matches #{constraints.inspect}"
              message << " missing required keys: #{missing_keys.sort.inspect}"

              raise ActionController::UrlGenerationError, message
            end