fix: ts语法修改

src/views/datamanager/alertformdata/components/common/QuestionFormBase.vue

@@ -127,9 +127,9 @@ const handleCascaderChange = () => {
     formData.workshopId = workLocation.value[0];
     formData.workspaceId = workLocation.value[1];
     const tempString = getNameByWorkid(formData.workshopId, formData.workspaceId, locationOptions.value);
-    const strFlag = tempString.indexOf('-');
-    formData.workshopName = tempString.slice(0, strFlag);
-    formData.workspaceName = tempString.slice(strFlag + 1);
+    const strFlag = tempString?.indexOf('-');
+    formData.workshopName = tempString?.slice(0, strFlag);
+    formData.workspaceName = tempString?.slice(strFlag! + 1);
   } else {
     Reflect.deleteProperty(formData, "workshopId");
     Reflect.deleteProperty(formData, "workspaceId");