品牌删除增加限制

ruoyi-modules/ruoyi-mall/src/main/java/org/dromara/mall/enums/product/ErrorCodeConstants.java

@@ -22,6 +22,7 @@ public interface ErrorCodeConstants {
     ErrorCode BRAND_NOT_EXISTS = new ErrorCode(1_008_002_000, "品牌不存在");
     ErrorCode BRAND_DISABLED = new ErrorCode(1_008_002_001, "品牌已禁用");
     ErrorCode BRAND_NAME_EXISTS = new ErrorCode(1_008_002_002, "品牌名称已存在");
+    ErrorCode BRAND_HAVE_BIND_SPU = new ErrorCode(1_008_001_005, "品牌下存在商品，无法删除");
 
     // ========== 商品属性项 1-008-003-000 ==========
     ErrorCode PROPERTY_NOT_EXISTS = new ErrorCode(1_008_003_000, "属性项不存在");

ruoyi-modules/ruoyi-mall/src/main/java/org/dromara/mall/service/product/ProductSpuService.java

@@ -124,6 +124,14 @@ public interface ProductSpuService {
      */
     Long getSpuCountByCategoryId(Long categoryId);
 
+    /**
+     * 通过品牌 brandId 查询 SPU 个数
+     *
+     * @param brandId 品牌id
+     * @return SPU 数量
+     */
+    Long getSpuCountByBrandId(Long brandId);
+
 
     /**
      * 校验商品是否有效。如下情况，视为无效：

ruoyi-modules/ruoyi-mall/src/main/java/org/dromara/mall/service/product/impl/ProductBrandServiceImpl.java

@@ -14,6 +14,8 @@ import org.dromara.mall.controller.product.admin.brand.vo.ProductBrandUpdateReqV
 import org.dromara.mall.domain.product.ProductBrandDO;
 import org.dromara.mall.mapper.product.ProductBrandMapper;
 import org.dromara.mall.service.product.ProductBrandService;
+import org.dromara.mall.service.product.ProductSpuService;
+import org.springframework.context.annotation.Lazy;
 import org.springframework.stereotype.Service;
 import org.springframework.validation.annotation.Validated;
 
@@ -36,6 +38,10 @@ public class ProductBrandServiceImpl implements ProductBrandService {
     @Resource
     private ProductBrandMapper productBrandMapper;
 
+    @Resource
+    @Lazy // 循环依赖，避免报错
+    private ProductSpuService productSpuService;
+
     @Override
     public Long createBrand(ProductBrandCreateReqVO createReqVO) {
         // 校验
@@ -62,6 +68,11 @@ public class ProductBrandServiceImpl implements ProductBrandService {
     public void deleteBrand(Long id) {
         // 校验存在
         validateBrandExists(id);
+        // 校验品牌是否绑定了 SPU
+        Long spuCount = productSpuService.getSpuCountByBrandId(id);
+        if (spuCount > 0) {
+            throw exception(BRAND_HAVE_BIND_SPU);
+        }
         // 删除
         productBrandMapper.deleteById(id);
     }

ruoyi-modules/ruoyi-mall/src/main/java/org/dromara/mall/service/product/impl/ProductSpuServiceImpl.java

@@ -273,4 +273,8 @@ public class ProductSpuServiceImpl implements ProductSpuService {
         return productSpuMapper.selectCount(ProductSpuDO::getCategoryId, categoryId);
     }
 
+    @Override
+    public Long getSpuCountByBrandId(Long brandId) {
+        return productSpuMapper.selectCount(ProductSpuDO::getBrandId, brandId);
+    }
 }