Ruby on rails 在rails控制器中渲染后强制返回？

使用

rails 4.2.1

我想写一个函数，强制调用它的控制器渲染并返回。这可能吗

def error!
  # do stuff to define error
  # now render error
  render
end

def SomeController < ActionController::Metal
  include AbstractController::Rendering
  include ActionController::Rendering
  include AbstractController::Callbacks
  include ActionController::Renderers::All
  include ActionController::ImplicitRender
  def some_action
    if something
      # good - continue
    else
      # bad - error!
      error!
      # how to force controller to stop execution and return here?
      # return error! # I could do this
      # but could I do it in the error! function?
    end
    puts 'Still Running'
  end
end

def错误！
#做一些事情来定义错误
#现在渲染错误
提供
结束
def SomeController

检查

def some_action
   if something
     # good - continue
   else         
     return error!         
   end
  puts 'Still Running'
end

---

另一个选项是在

错误中引发异常，并在
ApplicationController
level
将控制器实例传递到
错误中时会发生什么！（控制器）
作为参数，是否执行
controller.render
？