module Ecom
  module Core
    class MaterialIdentity < ApplicationRecord
      belongs_to :material_type
      belongs_to :material_sub_type, optional: true

      validates :material_type_id, :material_type, presence: true
      validate :material_category_hierarchy_validator

      def material_category_hierarchy_validator
        return if material_type_id.nil? || material_sub_type_id.nil?

        material_sub_type = MaterialSubType.find_by(id: material_sub_type_id)

        return unless material_sub_type.material_type_id != material_type_id

        errors.add(:material_type, 'The given material_sub_type does not belong to the given material_type')
      end
    end
  end
end