康康无障碍版 [英] Cancan accessible_by

问题描述

当我这样做时到底发生了什么？

What exactly is happening when I do:

@patient.course_enrollments.accessible_by(current_ability)

发生的事情是我得到了course_enrollments，其中 course.client_id = user.client.id ，我只是不明白 accessible_by 的工作原理。

What seems to happen is I get course_enrollments where course.client_id = user.client.id, I just don't understand how accessible_by works.

# ability.rb
can :manage, CourseEnrollment, :course => {:client_id => user.client.id}

推荐答案

> accessible_by 为您提供一个范围，该范围仅包含在 current_ability 情况下您可以访问的记录。既然您说过 CourseEnrollment 的：manage 能力是由当前用户拥有的课程过滤的，所以 accessible_by 调用将添加相同的限制，以便返回的课程注册都将由当前用户访问。

accessible_by gives you a scope that includes only those records which you'd be able to access given the current_ability. Since you stated that the :manage ability on CourseEnrollment is filtered by courses owned by the current user, the accessible_by call will add in that same restriction so that the course enrollments returned will all be "accessible by" the current user.

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