bug fix

@@ -67,14 +67,19 @@ public class ProductServiceImpl implements ProductService{
 			productInfo.setLeastPrice(new BigDecimal(0));
 			setBrand(productInfo, product.getBrandId());
 			setSeries(productInfo, product.getSeriesId());
+			productInfo.setLeastPrice(null);
+
 
 			List<GoodsBO> goodsBOList = getGoodsList(product.getId());
 			if (!CollectionUtils.isEmpty(goodsBOList) && goodsBOList.get(0) != null) {
 				GoodsBO goodsBO = goodsBOList.get(0);
 				List<GoodsSize> goodsSizes = goodsBO.getSizeList();
 				if (!CollectionUtils.isEmpty(goodsSizes)) {
-					BigDecimal leastPrice = goodsSizes.stream().map(GoodsSize::getLeastPrice).filter(Objects::nonNull).min((p1, p2) -> (p1.compareTo(p2))).get();
-					productInfo.setLeastPrice(leastPrice);
+					List<BigDecimal> leastPriceList = goodsSizes.stream().map(GoodsSize::getLeastPrice).filter(Objects::nonNull).collect(Collectors.toList());
+					if (!CollectionUtils.isEmpty(leastPriceList)) {
+						BigDecimal leastPrice = leastPriceList.stream().min((p1, p2) -> (p1.compareTo(p2))).get();
+						productInfo.setLeastPrice(leastPrice);
+					}
 					goodsSizes.sort(Comparator.comparing(GoodsSize::getOrderBy));
 				}
 			}