// 云函数入口文件:统计记录总数
// 云函数入口文件
const cloud = require('wx-server-sdk')
cloud.init({ env: cloud.DYNAMIC_CURRENT_ENV }) // 使用当前云环境
const db = cloud.database()
exports.main = async (event, context) => {
const wxContext = cloud.getWXContext()
try{
return await db.collection(event.tablename).count().total
} catch (e) {
console.log(e.total)
}
}

好歹报错日志截图看下
START RequestId: a52610ab-1652-4b5b-9386-84925439429f
Event RequestId: a52610ab-1652-4b5b-9386-84925439429f
Response RequestId: a52610ab-1652-4b5b-9386-84925439429f RetMsg: null
END RequestId: a52610ab-1652-4b5b-9386-84925439429f
Report RequestId: a52610ab-1652-4b5b-9386-84925439429f Duration: 87ms Memory: 256MB MemUsage: 24.847656MB