# frozen_string_literal: true

# Lessons
class Lesson < ApplicationRecord
  # == Constants ============================================================

  # == Attributes ===========================================================

  # == Extensions ===========================================================

  # == Relationships ========================================================
  belongs_to :course
  belongs_to :week
  belongs_to :video, optional: true

  # == Validations ==========================================================
  validates :name, presence: true

  # == Scopes ===============================================================
  scope :by_course, ->(c_id) { where(course_id: c_id) }
  scope :by_week, ->(w_id) { where(week_id: w_id) }
  scope :name_asc, -> { order(:name) }
  scope :name_desc, -> { order(name: :desc) }

  # == Callbacks ============================================================

  # == Class Methods ========================================================

  # == Instance Methods =====================================================
end