设备维护项目导出兼容没有文件的情况

src/views/component/device/index.vue

@@ -630,7 +630,7 @@ export default {
         }
     },
     async mounted () {
-        const { stateList, hideSysDeviceNo, tabList } = await getSetting('device')
+        const { stateList, hideSysDeviceNo, tabList } = await getSetting('device') || {}
         if (stateList) {
             console.debug('stateList', stateList)
             this.stateList = stateList
@@ -1049,15 +1049,20 @@ export default {
             } else {
                 const attachmentId = 'device_maintainProject'
                 const res = await download({ attachmentId })
-                // const blob = new Blob([res.data], { type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet' })
-                const a = document.createElement('a')
-                a.style.display = 'none'
-                // a.href = URL.createObjectURL(blob)
-                a.href = res.request.responseURL
-                // a.download = '设备维护项目导入模版'
-                document.body.appendChild(a)
-                a.click()
-                document.body.removeChild(a)
+                // 判断 ArrayBuffer 的大小，主要用于兼容没有文件的情况
+                if (res.data?.byteLength === 0) {
+                    this.xlsx([], this.projectColums, '设备维护项目模板' + this.getTimeStamp())
+                } else {
+                    // const blob = new Blob([res.data], { type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet' })
+                    const a = document.createElement('a')
+                    a.style.display = 'none'
+                    // a.href = URL.createObjectURL(blob)
+                    a.href = res.request.responseURL
+                    // a.download = '设备维护项目导入模板'
+                    document.body.appendChild(a)
+                    a.click()
+                    document.body.removeChild(a)
+                }
             }
             this.$message.success('导出维护项目成功！')
         },