小程序云开发教程如何使用云函数实现点赞功能

 vote: function(e){
 var arr = this.data.voteArr;
 var id = Number(e.currentTarget.dataset.index),
 D = this.data.datas;
 console.log(id)
 if (arr.indexOf(D[id].id) != -1){
 D[id].vote -= 1;
 arr.splice(arr.indexOf(D[id].id), 1)
 this.setData({
 datas: D,
 voteArr: arr
 })
 }else{
 arr.push(D[id].id)
 this.setData({
 voteArr: arr
 })
 if (id || id == 0) {
 D[id].zanUrl = this.data.zanIcon1
 D[id].vote = Number(D[id].vote) + 1
 }

 let data = {
 vote: Number(D[id].vote) + 1,
 id: D[id].id,
 userId: wx.getStorageSync('userId'),
 }
 console.log(data)

 wx.cloud.callFunction({
 name: 'vote',
 //点赞需要的参数:
 // 点赞数 +1
 // 该条的id
 data: { 
  vote: Number(D[id].vote) + 1,
  id: D[id].id,  
 },
 suess: res => {
  wx.showToast({
  title: '点赞成功',
  })
  this.setData({
  datas: D
  })

 },
 fail: err => {
  wx.showToast({
  icon: 'none',
  title: '点赞失败',
  })
  console.error('[云函数] 调用失败', err)
 }
 })
 }
 
 
 },

// 云函数入口文件
const cloud = require('wx-server-sdk')
cloud.init()
const db = cloud.database()


// 云函数入口函数
exports.main = async (event, context) => { 
//取得传过来的参数, 可以使用{vote,id } = event 更简洁
 var vote = event.vote, id = event.id;
 console.log('云函数zan成功', vote, id)

 // console.warn(data)

 try {
 return await db.collection('funnys').where({
 id: Number(id)
 }).update({
 data: {
 vote: vote
 },
 suess: res => {
 console.log('云函数成功', vote, id)
 
 },
 fail: e => {
 console.error(e)
 }
 })
 } catch (e) {
 console.error(e)
 }

}