const cloud = require('wx-server-sdk')
cloud.init()
const db = cloud.database()
const MAX_LIMIT = 100
exports.main = async (event, context) => {
// 先取出集合记录总数
const countResult = await db.collection('desk').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('desk').skip(i * MAX_LIMIT).limit(MAX_LIMIT).orderBy("room","asc").orderBy("numb","asc").get()
// const promise = db.collection('desk').skip(i * MAX_LIMIT).limit(MAX_LIMIT).orderBy("id","asc").get()
tasks.push(promise)
}
// 等待所有
return (await Promise.all(tasks)).reduce((acc, cur) => {
return {
data: acc.data.concat(cur.data),
errMsg: acc.errMsg,
}
})
}
加入orderBy之后就要4s左右查询时间,删掉orderBy就是1s都不用