如果Devise和Rails有问题？ [英] If questions with Devise and Rails?

问题描述

我只想要创建对象的人，例如一个注册表看到的东西=，但努力定义一切与Devise

I want only the people who created an object e.g. a registry to see something =, but struggling to define everything with Devise

这是代码：

<% if user_signed_in? && ***"current_user = registry the user created?"?(struggling with the second part)*** %>

提前感谢

我正在使用cancan，但是在我想要显示页面的展示页面中这不会有帮助。

P.S. I'm using cancan, but this will not help in my show page where I want to show page.

推荐答案

您需要定义cancan功能文件中的功能：

You need to define the ability inside your cancan ability file:

user ||= User.new
can :read, Registry, :user_id => user.id

Cancan的authorize方法将允许您执行以下操作：

This way cancan's authorize method will allow you to do stuff like this:

@registry = Registry.find(params[:id])
authorize! :read, @registry

显然授权！如果用户无法访问此资源，将会抛出错误。

Obviously authorize! will throw an error if the user has no access to this resource.

如果您只想在查看您使用的注册表中检查：

If you simply want to check this in the view the registry you use:

<% if can? :read, @registry %>
  do your thing here
<% end %>

顺便提一下，所有这一切都记录在cancan首页上： https://github.com/ryanb/cancan

By the way, all of this is documented on the cancan frontpage: https://github.com/ryanb/cancan

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