微信小程序云开发数据库操作更新记录

官方文档解读：<!– 更新记录 –>  <view class=”guide” wx:if=”{{step === 5}}”>    <text class=”headline”>更新记录</text>    <text class=”p”>1. 打开 pages/databaseGuide/databaseGuide.js 文件，定位到 onCounterInc 和 onCounterDec 方法</text>    <text class=”p”>2. 把注释掉的代码解除注释</text>    <image class=”code-image” src=”../../images/code-db-inc-dec.png” mode=”aspectFit”></image>    <text class=”p”>3. 点击下方按钮更新计数器</text>    <div class=”counter”>      <button class=”minus” size=”mini” type=”default” bindtap=”onCounterDec”>-</button>      <text class=”p”>{{count}}</text>      <button class=”plus” size=”mini” type=”default” bindtap=”onCounterInc”>+</button>    </div>    <div class=”nav”>      <button class=”prev” size=”mini” type=”default” bindtap=”prevStep”>上一步</button>      <button class=”next” size=”mini” type=”default” bindtap=”nextStep”>下一步</button>    </div>  </view>wxml：<div class=”counter”>      <button class=”minus” size=”mini” type=”default” bindtap=”onCounterDec”>-</button>      <text class=”p”>{{count}}</text>      <button class=”plus” size=”mini” type=”default” bindtap=”onCounterInc”>+</button></div>js：// pages/databaseGuide/databaseGuide.jsconst app = getApp()Page({  data: {    step: 1,    counterId: ”,    openid: ”,    count: null,    queryResult: ”,  },  onLoad: function (options) {    if (app.globalData.openid) {      this.setData({        openid: app.globalData.openid      })    }  },  onCounterInc: function() {    const db = wx.cloud.database()    const newCount = this.data.count + 1    db.collection(‘counters’).doc(this.data.counterId).update({      data: {        count: newCount      },      success: res => {        this.setData({          count: newCount        })      },      fail: err => {        icon: ‘none’,        console.error(‘[数据库] [更新记录] 失败：’, err)      }    })  },  onCounterDec: function() {    const db = wx.cloud.database()    const newCount = this.data.count – 1    db.collection(‘counters’).doc(this.data.counterId).update({      data: {        count: newCount      },      success: res => {        this.setData({          count: newCount        })      },      fail: err => {        icon: ‘none’,        console.error(‘[数据库] [更新记录] 失败：’, err)      }    })  },})效果如下：http://recordit.co/NUyzs7XneE原文作者：祈澈姑娘技术博客：https://www.jianshu.com/u/05f416aefbe190后前端妹子，爱编程，爱运营，爱折腾。坚持总结工作中遇到的技术问题，坚持记录工作中所所思所见，欢迎大家加入群聊，一起探讨交流。微信小程序