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Rails Before_action中可以直接render返回

一个例子:

  before_action :check_failed_and_return, :only => [:test]

  def test
    render plain: 'hihihi'
  end

  def check_failed_and_return
    render plain: 'error'    # 这里加不加and return 都一样.
  end

访问 /test 之后(路由略), 页面显示的是:   error.   

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