class SBrand < ApplicationRecord
  has_many :p_products
  has_many :p_product_refs, through: :p_products
  validates :name, :presence => true, :uniqueness => true

  before_save do
    if self.code.blank?
      generate_code
    end
  end


  def generate_code
    if self.code.blank?
      prefix = self.name.slice(0, 4).to_slug.upcase
      last_number = 1
      code = prefix + "%02d" % [last_number]

      while self.class.find_by(code: code)
        last_number += 1
        code = prefix + "%02d" % [last_number]
      end
      self.code = code
    end
  end
end