huiting/cloudfunctions/getUser/index.js

// 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) => {
  let {
    OPENID
  } = cloud.getWXContext()

  try {
    return await db.collection('user').doc(OPENID).get()
  } catch (err) {
    return {
      errMsg: 'no such user'
    }
  }
}