Ruby on Rails:如何为变量分配一个硬值? [英] Ruby on Rails: How to assign a hard value to a variable?

问题描述

我正在使用多个重定向，我想从 A->B->C->A 重定向.

I am using multiple redirects, and I would like to redirect from A->B->C->A.

所以在 B 中，我将路径 A 保存为

So in B, I save path A as

@previouspage = request.referer

所以此时@previouspage = A，但是当我在C中调用@previouspage时，它并没有带来B中保存的硬值，而是找到了自己的相对request.referer，也就是B.

and so @previouspage = A at this point, but when I call @previouspage in C, it doesn't bring the hard value saved in B, but finds its own relative request.referer, which is B.

所以在 C 中，@previouspage = B(因为我认为 Ruby 中的变量是软链接)

So in C, @previouspage = B (because I think variables in Ruby are soft-links)

我如何只保存 request.referer 在 B 点的值，然后将该 URL 保存到我以后可以访问的变量中?

How would I just save whatever the value of request.referer was at point B, and then save that URL into a variable that I can access later?

推荐答案

HTTP 是一种无状态协议:在请求之间不会记住变量.如果您想在请求之间保存状态，那么您可以使用会话.在 Rails 中，它是这样完成的:

HTTP is a stateless protocol: variables are not remembered between requests. If you want to save state between requests, then you might use a session. In Rails it is done like this:

在乙:

session[:page_a] = request.referer

在 C:

@next_page = session[:page_a]

Rails 安全指南从会话及其漏洞开始.你可能想看看.

The Rails Security Guide begins with sessions and their vulnerabilities. You might want to check it out.

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