需求:做一个类似抽奖结果通知的订阅消息提醒
实现流程:
每个用户需要先授权订阅消息接收,授权成功后把数据存到云开发的数据集合里面,再写个定时器,遍历数据集合的所有数据,拿到后遍历发送订阅消息,发送成功后删除该数据。
下面看看实现操作和代码:
1. 创建云开发环境,创建数据集合 msg , 数据权限改成自定义,全部可修改
2.小程序授权和提交用户信息的代码(data 为订阅消息的字段,用户Openid,订阅消息跳转的页面),
wx.requestSubscribeMessage({
tmplIds: ['DYvZoya_RukdkznIQchLWsD296UujyU_pCFGRXa9nnw'],
success (res) {
wx.cloud.callFunction({
name: "sendMsg",
data: {
thing5: '111',
thing1: '22',
name2: '33',
thing6: '44',
openid: 'oESJb5LTR0lu7rUn9mVpAt-xEu2k',
page: 'pages/index/index',
},
success(res) {
console.log('个人信息-------------', res)
},
fail(err) {
console.log('个人信息-------------', err)
}
})
}
})
3.储存数据的云函数,新建一个云函数 sendMsg,代码:
const cloud = require('wx-server-sdk')
cloud.init({
env: 'shijihyj-5g7mfb4z4011210a '
})
const db = cloud.database()
exports.main = async (event, context) => {
db.collection('msg').add({
// data 字段表示需新增的 JSON 数据
data: {
thing5: event.thing5,
thing1: event.thing1,
name2: event.name2,
thing6: event.thing6,
openid: event.openid,
page: event.page,
}
})
.then(res => {
console.log(res)
return res
})
.catch(console.error)
}
4.再创建定时器 myTrigger
{
"permissions": {
"openapi": [
"subscribeMessage.send"
]
},
"triggers": [
{
"name": "myTrigger",
"type": "timer",
"config": "10 * * * * * *"
}
]
}
js
const cloud = require('wx-server-sdk')
cloud.init({
env: 'shijihyj-5g7mfb4z4011210a '
})
const db = cloud.database()
var sendMsg = async (item) =>{
const result = await cloud.openapi.subscribeMessage.send({
touser: item.openid,
page: item.page,
lang: 'zh_CN',
data: {
thing5: {
value: item.thing5
},
thing1: {
value: item.thing1
},
name2: {
value: item.name2
},
thing6: {
value: item.thing6
}
},
templateId: 'DYvZoya_RukdkznIQchLWsD296UujyU_pCFGRXa9nnw',
})
const remove = await db.collection('msg').where({
openid: item.openid
}).remove()
}
const MAX_LIMIT = 100
exports.main = async (event, context) => {
// 先取出集合记录总数
const countResult = await db.collection('msg').count()
const total = countResult.total
// 计算需分几次取
const batchTimes = Math.ceil(total / 100)
// 承载所有读操作的 promise 的数组
const tasks = []
for (let i = 0; i < batchTimes; i++) {
const promise = db.collection('msg').skip(i * MAX_LIMIT).limit(MAX_LIMIT).get()
tasks.push(promise)
}
// 等待所有
var arr = (await Promise.all(tasks)).reduce((acc, cur) => {
return {
data: acc.data.concat(cur.data),
errMsg: acc.errMsg,
}
})
for(var i =0;i<arr.data.length;i++){
sendMsg(arr.data[i])
}
}
提交就完成了