diff --git a/src/modules/app.service.ts b/src/modules/app.service.ts
index adbf831..c01d9dd 100644
--- a/src/modules/app.service.ts
+++ b/src/modules/app.service.ts
@@ -79,7 +79,7 @@ export function resolveUrlInfo (url: string) {
 }
 
 export function connectionCanEdit(connection: Connection) {
-    if (connection.privilegeDetailBeanList) {
+    if (connection && connection.privilegeDetailBeanList) {
         // privilegeType === 4 代表编辑权限，privilegeValue === 2 代表有权限
         return connection.privilegeDetailBeanList.some(item => item.privilegeType === 4 && item.privilegeValue === 2);
     }