【修复】CRM 分类删除时，判断商品数量是否为空不正确的问题，导致无法删除分类

yudao-module-crm/yudao-module-crm-api/src/main/java/cn/iocoder/yudao/module/crm/enums/ErrorCodeConstants.java

@@ -87,7 +87,7 @@ public interface ErrorCodeConstants {
     ErrorCode PRODUCT_CATEGORY_USED = new ErrorCode(1_020_009_002, "产品分类已关联产品");
     ErrorCode PRODUCT_CATEGORY_PARENT_NOT_EXISTS = new ErrorCode(1_020_009_003, "父分类不存在");
     ErrorCode PRODUCT_CATEGORY_PARENT_NOT_FIRST_LEVEL = new ErrorCode(1_020_009_004, "父分类不能是二级分类");
-    ErrorCode product_CATEGORY_EXISTS_CHILDREN = new ErrorCode(1_020_009_005, "存在子分类，无法删除");
+    ErrorCode PRODUCT_CATEGORY_EXISTS_CHILDREN = new ErrorCode(1_020_009_005, "存在子分类，无法删除");
 
     // ========== 商机状态 1_020_010_000 ==========
     ErrorCode BUSINESS_STATUS_TYPE_NOT_EXISTS = new ErrorCode(1_020_010_000, "商机状态组不存在");

yudao-module-crm/yudao-module-crm-biz/src/main/java/cn/iocoder/yudao/module/crm/service/product/CrmProductCategoryServiceImpl.java

@@ -110,10 +110,10 @@ public class CrmProductCategoryServiceImpl implements CrmProductCategoryService
         validateProductCategoryExists(id);
         // 1.2 校验是否还有子分类
         if (productCategoryMapper.selectCountByParentId(id) > 0) {
-            throw exception(product_CATEGORY_EXISTS_CHILDREN);
+            throw exception(PRODUCT_CATEGORY_EXISTS_CHILDREN);
         }
         // 1.3 校验是否被产品使用
-        if (crmProductService.getProductByCategoryId(id) !=null) {
+        if (crmProductService.getProductByCategoryId(id) > 0) {
             throw exception(PRODUCT_CATEGORY_USED);
         }
         // 2. 删除