educoder/app/models/team_member.rb

class TeamMember < ApplicationRecord
  belongs_to :user
  belongs_to :competition
  belongs_to :competition_team

  scope :only_teachers, -> { where(is_teacher: true) }
  scope :without_teachers, -> { where(is_teacher: false) }

  def creator?
    role == 1
  end

  def en_role
    is_teacher? ? 'teacher' : 'member'
  end
end