限购检查 添加数量

fs-user-app/src/main/java/com/fs/app/controller/store/ProductScrmController.java

@@ -250,7 +250,8 @@ public class ProductScrmController extends AppBaseController {
     @Login
     @ApiOperation("检查商品限购")
     @GetMapping("/checkPurchaseLimit")
-    public R checkPurchaseLimit(@RequestParam(value="productId") Long productId){
+    public R checkPurchaseLimit(@RequestParam(value="productId") Long productId, 
+                                @RequestParam(value="num", required = false, defaultValue = "1") Integer num){
         try {
             // 查询商品信息
             FsStoreProductScrm product = productService.selectFsStoreProductById(productId);
@@ -279,9 +280,9 @@ public class ProductScrmController extends AppBaseController {
             
             // 计算剩余可购买数量
             int remainingPurchaseLimit = product.getPurchaseLimit() - purchasedNum;
-            if (remainingPurchaseLimit <= 0) {
+            if (remainingPurchaseLimit < num) {
                 // 剩余可购买数量不足
-                return R.error("该商品限购" + product.getPurchaseLimit() + "件，目前剩余可购买数量不足");
+                return R.error("该商品限购" + product.getPurchaseLimit() + "件，您已购买" + purchasedNum + "件，本次购买" + num + "件，超出限购数量");
             }
             
             // 剩余可购买数量充足