rails-models - rails 关联——我可以使用 :through 多次吗？

Question

我可以做这样的事情吗？

Class School < ActiveRecord::Base
  has_many :courses
  has_many :students, :through => courses, :through => coursesections, :through => enrollments
end

Class Course < ActiveRecord::Base
  has_many :coursesections
  has_one :school
end

Class CourseSection < ActiveRecord::Base
  has_one :course
  has_one :school, :through => courses
  has_many :students, :through => enrollments
end

Class Student < ActiveRecord::Base
  has_many :sections, :through => enrollments
end

Enrollment 表只有一个 student_id 和一个 section_id 用于学生注册的课程部分。