带有参数的before

本文介绍了带有参数的before_filter的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我有一种方法可以执行以下操作：

I have a method that does something like this:

before_filter :authenticate_rights, :only => [:show] def authenticate_rights project = Project.find(params[:id]) redirect_to signin_path unless project.hidden end

我也想在其他一些Controller中使用此方法，因此我将该方法复制到了application_controller中包含的一个助手中

I also want to use this method in some other Controllers, so i copied the method to a helper that is included in the application_controller.

问题是，在某些控制器中，项目的id不是：id 符号但是fe ：project_id （还有：id 存在（对于其他模型）

the problem is, that in some controllers, the id for the project isn't the :id symbol but f.e. :project_id (and also a :id is present (for another model)

您将如何解决此问题？是否可以在before_filter操作中添加参数（以传递正确的参数）？

How would you solve this problem? is there an option to add a parameter to the before_filter action (to pass the right param)?

推荐答案

我会这样做：

before_filter { |c| c.authenticate_rights correct_id_here } def authenticate_rights(project_id) project = Project.find(project_id) redirect_to signin_path unless project.hidden end

其中 correct_id_here 是访问项目的相关ID 。

Where correct_id_here is the relevant id to access a Project.