ruby-on-rails - 重定向到!=返回

Question

我正在寻找有关 redirect_to 行为的一些说明。

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:

Render and/or redirect were called multiple times in this action. Please note that you may only call render OR redirect, and at most once per action.

看来该方法在 redirect_to 调用之后继续执行。我需要编写这样的代码吗:

if some_condition
   redirect_to(path_one)
   return
end

redirect_to(path_two)

Answer 1

是的，进行重定向时需要从方法返回。它实际上只为响应对象添加适当的 header 。

您可以编写更多 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)

或者另一种方式:

redirect_path = path_one

if some_condition
    redirect_path = path_two
end

redirect_to redirect_path