12451 b553c4e519 feat: API 统一 + 设备详情补全 + H5 导航优化

- API 路由统一: 移除 /api/h5/，统一 /api/pms/ 入口
- 二进制改名: api-server -> pms-api（与服务名一致）
- nginx: 合并 /api/ + /pms/api/ 为 /api/pms/
- 新增 docs/API.md 接口文档
- 后端: CabinetDetail 增加 rssi/pow_fail/address/soc 等字段
- Redis 管道批量读取仓体实时数据（SOC/电压/电流/功率）
- DB: 所有 TIMESTAMP 列改为 DATETIME（修复类型不匹配）
- 用户管理: 新增创建时间/修改时间列，状态改用 Switch
- 角色管理/用户管理: 操作按钮改为图标
- PC 设备详情: 基本信息补全 RSSI/ICCID/电源/地址
- PC 卡片: 通道统计改用 Lucide 图标，颜色统一
- PC 二维码: canvas 渲染，含编号文字，支持右键下载
- H5: 按 uni-app 规范修正导航（navigateTo 替代 reLaunch）
- H5: 详情页加返回导航条
- H5: 扫码支持摄像头（jsQR）+ ?id= 参数
- H5: 底部 tabBar 在所有页面常显
- H5: 首页统计改为 6 项（设备/通道/空闲/充电/充满/故障）
- H5: 下拉刷新 / 上拉加载
- 产品首页: 添加业务联系
- 文档: 清理过时文件，补充缺失规范章节

2026-07-04 04:03:02 +08:00

4.3 KiB

Raw Blame History

title, impact, impactDescription, type, tags

title

impact

impactDescription

type

Clean Up Async Operations in Watchers to Prevent Race Conditions

Impact: HIGH - When a watched value changes rapidly, multiple async operations run concurrently. Without cleanup, a slow earlier request can complete after a faster later request, overwriting current data with stale results.

Always use onWatcherCleanup or the onCleanup callback parameter to cancel pending async operations when the watcher re-runs or the component unmounts.

Task Checklist

Use onWatcherCleanup() or onCleanup parameter in async watchers
Use AbortController to cancel pending fetch requests
Cancel any setTimeout/setInterval calls in cleanup
Invalidate previous async operation results with flags
Consider debouncing rapid changes before fetching

Incorrect:

import { ref, watch } from 'vue'

const searchQuery = ref('')
const results = ref([])

// BAD: Race condition - slow request for "a" can finish after fast request for "ab"
watch(searchQuery, async (query) => {
  if (query) {
    const response = await fetch(`/api/search?q=${query}`)
    results.value = await response.json()  // May overwrite newer results!
  }
})

// BAD: No cleanup for timeouts
watch(searchQuery, (query) => {
  // Previous timeout keeps running even when query changes
  setTimeout(() => {
    performExpensiveSearch(query)
  }, 500)
})

Correct:

import { ref, watch, onWatcherCleanup } from 'vue'

const searchQuery = ref('')
const results = ref([])
const loading = ref(false)

// CORRECT: Using onWatcherCleanup (Vue 3.5+)
watch(searchQuery, async (query) => {
  if (!query) {
    results.value = []
    return
  }

  const controller = new AbortController()

  // Register cleanup to abort on re-run or unmount
  onWatcherCleanup(() => {
    controller.abort()
  })

  loading.value = true
  try {
    const response = await fetch(`/api/search?q=${query}`, {
      signal: controller.signal
    })
    results.value = await response.json()
  } catch (err) {
    if (err.name !== 'AbortError') {
      console.error('Search failed:', err)
    }
  } finally {
    loading.value = false
  }
})

Using onCleanup Parameter

import { ref, watch } from 'vue'

const userId = ref(1)
const userData = ref(null)

// CORRECT: Using onCleanup callback parameter
watch(userId, (newId, oldId, onCleanup) => {
  const controller = new AbortController()

  fetch(`/api/users/${newId}`, { signal: controller.signal })
    .then(res => res.json())
    .then(data => {
      userData.value = data
    })
    .catch(err => {
      if (err.name !== 'AbortError') {
        console.error(err)
      }
    })

  onCleanup(() => {
    controller.abort()
  })
})

Cleanup with Timeouts

import { ref, watch, onWatcherCleanup } from 'vue'

const input = ref('')

// CORRECT: Cancel previous timeout on new input
watch(input, (value) => {
  const timeoutId = setTimeout(() => {
    performExpensiveOperation(value)
  }, 300)

  onWatcherCleanup(() => {
    clearTimeout(timeoutId)
  })
})

Invalidation Flag Pattern

import { ref, watch } from 'vue'

const id = ref(1)
const data = ref(null)

// CORRECT: Invalidation flag for non-abortable operations
watch(id, async (newId, oldId, onCleanup) => {
  let cancelled = false

  onCleanup(() => {
    cancelled = true
  })

  const result = await someNonAbortableAsyncOperation(newId)

  // Check if this watch run is still valid
  if (!cancelled) {
    data.value = result
  }
})

watchEffect Cleanup

import { ref, watchEffect, onWatcherCleanup } from 'vue'

const resourceId = ref('abc')

watchEffect(async () => {
  const id = resourceId.value
  const controller = new AbortController()

  onWatcherCleanup(() => {
    controller.abort()
  })

  const data = await fetchResource(id, { signal: controller.signal })
  processData(data)
})

4.3 KiB Raw Blame History