在ruby on rails中传递关联属性

class User < ApplicationRecord
  has_one :profile
end

class Profile < ApplicationRecord
  belongs_to :user
end

class Author < ApplicationRecord
  has_many :articles
end

class Article < ApplicationRecord
  belongs_to :author
end

class Student < ApplicationRecord
  has_many :course_selections
  has_many :courses, through: :course_selections
end

class Course < ApplicationRecord
  has_many :course_selections
  has_many :students, through: :course_selections
end

class CourseSelection < ApplicationRecord
  belongs_to :student
  belongs_to :course
end

user = User.first
user.profile.name

author = Author.first
author.articles.each do |article|
  puts article.title
end

student = Student.first
student.courses.each do |course|
  puts course.name
end