Rails方式-如何向课程添加注册-课程控制器或侧倾控制器？

Question

I have a course model and a roll model (which points to the course and to the student).

course has many rolls
roll belongs to course
roll belongs to student

When viewing a visitor record (attended a class but not on the roll [attendance and event models not pertinent]) I want to be able to click a button to enroll them in the course and then take them to the edit view of the enrollment record (for specifying type of enrollment and any notes).

Adding a student to a course... controllers... should I have a method on the course to add the roll record or should I have a method on the roll? After the record is created the controller should redirect to the rolls#edit.

I'm somewhat of a rails newbie and want to make sure I'm doing this the right way/rails way. And I'm sure this type of question has been asked before, but my searches avail me naught-- I'm sure I'm not searching the right phrases.

Answer 1

I would link that button to RollsController#create. The other option you might be considering is CoursesController#update, but you're not really changing anything about the course itself, like its name, number of credits, or anything intrinsic to the course.

You're creating a new instance of an enrollment: a student in a course. RollsController#create.