fix: 修复bug

src/views/dike/runManage/enginerring/inspectionRecords/index.vue

@@ -108,6 +108,10 @@ export default {
           console.log("取消删除");
         });
     },
+    calcHours(start, end) {
+      if (!start || !end) return "-";
+      return dayjs(end).diff(dayjs(start), "hour");
+    },
     getTreeData() {
       getAreasData().then((items) => {
         // console.log("getAreasData", items.data);
@@ -541,14 +545,16 @@ export default {
           label="巡查开始时间/结束时间"
         >
           <template slot-scope="scope">
-            <span>{{ scope.row.startDate }}/{{ scope.row.endDate }}</span>
+            <span
+              >{{ scope.row.startDate || "-" }}/{{
+                scope.row.endDate || "-"
+              }}</span
+            >
           </template>
         </el-table-column>
         <el-table-column align="center" label="巡查时长/小时">
           <template slot-scope="scope">
-            <span>{{
-              dayjs(scope.row.endDate).diff(dayjs(scope.row.startDate), "hours")
-            }}</span>
+            <span>{{ calcHours(scope.row.startDate, scope.row.endDate) }}</span>
           </template>
         </el-table-column>