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32 lines
944 B
32 lines
944 B
2 years ago
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// 云函数入口文件
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const cloud = require('wx-server-sdk')
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cloud.init() // 使用当前云环境
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const db=cloud.database()
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const MAX_LIMIT=100
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// 云函数入口函数
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exports.main = async (event, context) => {
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const wxContext = cloud.getWXContext()
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//先取出集合记录总数
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const countResult=await db.collection('cloth').count()
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const total=countResult.total
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//计算分几次取
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const batchTimes = Math.ceil(total / 100)
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// 承载所有读操作的 promise 的数组
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const tasks = []
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for (let i = 0; i < batchTimes; i++) {
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const promise = db.collection('cloth').skip(i * MAX_LIMIT).limit(MAX_LIMIT).get()
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tasks.push(promise)
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}
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// 等待所有
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return (await Promise.all(tasks)).reduce((acc, cur) => {
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return {
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event,
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openid: wxContext.OPENID,
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appid: wxContext.APPID,
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unionid: wxContext.UNIONID,
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data: acc.data.concat(cur.data),
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errMsg: acc.errMsg,
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}
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})
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}
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