# validates

  validates :name,
            presence: true,
            uniqueness: true,
            length: { maximum: 32 },
            format: { with: /\A[a-z|0-9|_]+\z/ } # 半角アルファベット, 数値, アンスコのみ

  validates :postal_code,
            format: { with: /\A\d{7}\z/ },
            allow_blank: true

  validates :address,
            length: { maximum: 255 },
            allow_blank: true

  validates :tel,
            length: { maximum: 13 },
            format: { with: /\A\d{2,}+-\d{4}+-\d{4}+\z/ },
            allow_blank: true