。

src/main/java/com/izouma/nineth/domain/MetaStore.java

@@ -56,6 +56,10 @@ public class MetaStore extends BaseEntity {
     @Column(columnDefinition = "tinyint unsigned")
     private boolean onShelf;
 
+    @Transient
+    @ApiModelProperty("剩余可购买数量")
+    private int remainingPurchaseNum;
+
     @Transient
     private boolean canPurchase = true;
 

src/main/java/com/izouma/nineth/web/MetaStoreController.java

@@ -7,6 +7,7 @@ import com.izouma.nineth.dto.PageQuery;
 import com.izouma.nineth.enums.MetaPropUsedType;
 import com.izouma.nineth.enums.MetaStoreCommodityType;
 import com.izouma.nineth.exception.BusinessException;
+import com.izouma.nineth.repo.MetaStorePurchaseRecordRepo;
 import com.izouma.nineth.repo.MetaStoreRepo;
 import com.izouma.nineth.repo.MetaUserPropRepo;
 import com.izouma.nineth.service.MetaStoreService;
@@ -34,6 +35,8 @@ public class MetaStoreController extends BaseController {
 
     private MetaUserPropRepo metaUserPropRepo;
 
+    private MetaStorePurchaseRecordRepo metaStorePurchaseRecordRepo;
+
     //@PreAuthorize("hasRole('ADMIN')")
     @PostMapping("/save")
     public MetaStore save(@RequestBody MetaStore record) {
@@ -120,15 +123,25 @@ public class MetaStoreController extends BaseController {
         if (CollectionUtils.isEmpty(metaStores)) {
             return MetaRestResult.returnSuccess(metaStores);
         }
+        Long userId = SecurityUtils.getAuthenticatedUser().getId();
         if (MetaStoreCommodityType.META_PROP.equals(commodityType)) {
-            Long userId = SecurityUtils.getAuthenticatedUser().getId();
             metaStores.forEach(metaStore -> {
                 MetaUserProp metaUserProp = metaUserPropRepo.findByUserIdAndMetaPropIdAndDel(userId, metaStore.getMetaPropId(), false);
                 if (Objects.nonNull(metaUserProp) && MetaPropUsedType.PERMANENT.equals(metaUserProp.getUsedType()) && metaUserProp.getNum() >= 1) {
                     metaStore.setCanPurchase(false);
                 }
             });
+            return MetaRestResult.returnSuccess(metaStores);
         }
+        metaStores.forEach(metaStore -> {
+            int count = metaStorePurchaseRecordRepo.countByMetaStoreIdAndUserId(metaStore.getId(), userId);
+            if (metaStore.getPurchaseLimitNum() > count) {
+                metaStore.setRemainingPurchaseNum(metaStore.getPurchaseLimitNum() - count);
+            } else {
+                metaStore.setRemainingPurchaseNum(0);
+                metaStore.setCanPurchase(false);
+            }
+        });
         return MetaRestResult.returnSuccess(metaStores);
     }
 }