message: Use "findOne" instead of "findAll"
diff: @@ -58,9 +58,9 @@ module.exports.quantityCheckBeforeBasketItemAddition = function quantityCheckBef
  module.exports.quantityCheckBeforeBasketItemUpdate = function quantityCheckBeforeBasketItemUpdate () {
  return (req, res, next) => {
  - models.BasketItem.findAll({ where: { id: req.params.id } }).then((item) => {
  + models.BasketItem.findOne({ where: { id: req.params.id } }).then((item) => {
  if (req.body.quantity !== null) {
  - quantityCheck(req, res, next, item[0].dataValues.ProductId, req.body.quantity)
  + quantityCheck(req, res, next, item.dataValues.ProductId, req.body.quantity)
  } else {
  next()
  }
  