update 优化 修改角色如果未绑定用户则无需清理

ruoyi-system/src/main/java/com/ruoyi/system/service/impl/SysRoleServiceImpl.java

@@ -434,6 +434,11 @@ public class SysRoleServiceImpl implements ISysRoleService {
 
     @Override
     public void cleanOnlineUserByRole(Long roleId) {
+        // 如果角色未绑定用户 直接返回
+        Long num = userRoleMapper.selectCount(new LambdaQueryWrapper<SysUserRole>().eq(SysUserRole::getRoleId, roleId));
+        if (num == 0) {
+            return;
+        }
         List<String> keys = StpUtil.searchTokenValue("", 0, -1, false);
         if (CollUtil.isEmpty(keys)) {
             return;