text: // 云函数入口文件
  const cloud = require('wx-server-sdk')
  
  cloud.init({
    env: cloud.DYNAMIC_CURRENT_ENV
  })
  const db = cloud.database()
  // 云函数入口函数
  exports.main = async (event, context) => {
    console.log(event);
  
    let lotteryId = event.lotteryId;
  
    try {
      return await db.collection('participate')
      .where({
        lotteryId: lotteryId
      })
      .orderBy('participatedTime', 'desc')
      .limit(20)
      .get()
  
    } catch(e) {
      console.error(e)
    }
  }