before_filter 带参数 [英] before_filter with parameters

问题描述

我有一个方法可以做这样的事情:

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

我也想在其他一些控制器中使用这个方法，所以我把这个方法复制到了一个包含在 application_controller 中的 helper.

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 符号而是 f.e.:project_id (还有一个 :id 存在(对于另一个模型)

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)

你会如何解决这个问题?是否可以选择向 before_filter 操作添加参数(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 Project 的相关 ID.

Where correct_id_here is the relevant id to access a Project.

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