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- class CourseParticipation < ApplicationRecord
- belongs_to :course
- belongs_to :user
- validates :course_id, presence: true
- validates :user_id, presence: true
- enum role: [:student, :teacher]
- scope :teachers, -> { where(role: :teacher) }
- scope :students, -> { where(role: :student) }
- default_scope { order(role: :desc) }
- end
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