Ruby on rails 具有多个模型标准的专家

当使用pundit时，我理解我可以授权当前用户使用模型。简单

我有一个场景，我希望根据一个模型授权用户，并在第二个模型中确认标准，但是Pundit只允许一个模型

i、 e

学生为他们的班级写文章，并且可以评论文章

Class has many students M:M
Student has many classes M:M
Class has many articles 1:M
Article has many comments 1:M
Student has many articles 1:M
Student has many comments 1:M

在本文中，我需要授权：

Create action: Student is a member of the class
Destroy action: Student is member of class and is owner of article

Create action: Student is a member of class and article is not closed to comments
Destroy action: Student is member of class and is owner of article

在评论控制器中，我需要授权：

Create action: Student is a member of the class
Destroy action: Student is member of class and is owner of article

Create action: Student is a member of class and article is not closed to comments
Destroy action: Student is member of class and is owner of article

我希望在这里可以看到，当创建和销毁文章和评论时，我需要针对两种模型进行授权。始终为class_会员资格加上文章或评论

这可以做到在权威，因为我读它只能授权用户对一个模型