fix 修复 数据权限对union语句不兼容问题

ruoyi-common/ruoyi-common-mybatis/src/main/java/org/dromara/common/mybatis/aspect/DataPermissionAdvice.java

@@ -26,14 +26,19 @@ public class DataPermissionAdvice implements MethodInterceptor {
     public Object invoke(MethodInvocation invocation) throws Throwable {
         Object target = invocation.getThis();
         Method method = invocation.getMethod();
+        DataPermission previousPermission = DataPermissionHelper.getPermission();
         // 设置权限注解
         DataPermissionHelper.setPermission(getDataPermissionAnnotation(target, method));
         try {
             // 执行代理方法
             return invocation.proceed();
         } finally {
-            // 清除权限注解
-            DataPermissionHelper.removePermission();
+            // 恢复上一层权限上下文，兼容嵌套 Mapper 调用
+            if (previousPermission == null) {
+                DataPermissionHelper.removePermission();
+            } else {
+                DataPermissionHelper.setPermission(previousPermission);
+            }
         }
     }
 

ruoyi-common/ruoyi-common-mybatis/src/main/java/org/dromara/common/mybatis/handler/PlusDataPermissionHandler.java

@@ -71,13 +71,17 @@ public class PlusDataPermissionHandler {
      */
     public Expression getSqlSegment(Expression where, boolean isSelect) {
         try {
+            DataPermission dataPermission = getDataPermission();
+            if (dataPermission == null) {
+                throw new ServiceException("数据权限上下文缺失，请检查 @DataPermission 注解处理生命周期");
+            }
             LoginUser currentUser = currentUser();
             // 如果是超级管理员或租户管理员，则不过滤数据
             if (LoginHelper.isSuperAdmin()) {
                 return where;
             }
             // 构造数据过滤条件的 SQL 片段
-            String dataFilterSql = buildDataFilter(getDataPermission(), currentUser, isSelect);
+            String dataFilterSql = buildDataFilter(dataPermission, currentUser, isSelect);
             if (StringUtils.isBlank(dataFilterSql)) {
                 return where;
             }
@@ -91,8 +95,6 @@ public class PlusDataPermissionHandler {
             }
         } catch (JSQLParserException e) {
             throw new ServiceException("数据权限解析异常 => " + e.getMessage());
-        } finally {
-            DataPermissionHelper.removePermission();
         }
     }