Rails 3 + Devise：user_signed_in？为数据库中的不同用户？ [英] Rails 3 + Devise: user_signed_in? for a different user in the database?

问题描述

我正在构建一个应用程序，我想为给定的用户添加一个在线状态。

I'm building an app where I want to add an online status for a given user.

我知道Devise有一个方法user_signed_in？内建来检查使用该应用的用户是否已登录。但是，当我尝试将其用于不同的用户时，如下所示：

I know that Devise has a method user_signed_in? built in to check if the user who is using the app is signed in or not. But when I try to use it for a different user like this:

user_signed_in?(user)

user.user_signed_in?

我显然得到一个未定义的方法错误。

I obviously get an undefined method error.

Devise是否有一种方法，或者我必须自己写？
一种方法是将用户模型中给定用户的在线状态存储起来。
这是最好的解决方案？

Does Devise have a method for this or do I have to write my own? One approach was to store the online status of a given user in the user model. What's the best solution to this?

推荐答案

我不是Devise的作者，而是从我可以告诉Warden / Devise既不跟踪谁登录。

I'm not the author of Devise, but from what I can tell of Warden / Devise neither keep track of who is logged in.

在用户表中有一个is_online列的问题是很难看到谁是活动的在网站上我将添加一个名为last_seen的用户模型的列作为日期时间，并在每次用户请求页面时使用Devise进行更新。然后，您可以轻松添加User.online_count方法，也可以查看用户是否在过去5分钟内在网站上看到。

The problem with having an is_online column in the User table is that it is difficult to see who is active on the website. I would add a column to your User model called last_seen as a date-time, and update that with Devise every time the user requests a page. You could then easily add a User.online_count method or also see if a user has been seen at the website in the last 5 minutes.

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