redirect_to!=返回

Question

我正在寻找关于行为的一些澄清redirect_to.

我有这个代码:

if some_condition
   redirect_to(path_one)
end

redirect_to(path_two)

如果some_condition == true我收到此错误:

在此操作中多次调用渲染和/或重定向.请注意,您只能调用渲染或重定向,每次操作最多一次.

似乎该方法在redirect_to调用后继续执行.我需要编写这样的代码:

if some_condition
   redirect_to(path_one)
   return
end

redirect_to(path_two)

Answer 1

是的,您需要在进行重定向时从方法返回.它实际上只为响应对象添加了适当的标头.

你可以写更多rubyish方式:

if some_condition
    return redirect_to(path_one)
end

redirect_to(path_two)

或其他方式:

return redirect_to(some_condition ? path_one : path_two)

或另一种方式:

redirect_path = path_one

if some_condition
    redirect_path = path_two
end

redirect_to redirect_path

Answer 2

来自http://api.rubyonrails.org/classes/ActionController/Base.html:

如果你需要重定向某事的条件,那么一定要添加"并返回"以停止执行.

def do_something
  redirect_to(:action => "elsewhere") and return if monkeys.nil?
  render :action => "overthere" # won't be called if monkeys is nil
end

Answer 3

你也可以

redirect_to path_one and return

哪个读得不错.