我按照老师的方法试过了，首先是不能通过tcprouter调用程序，返回的是null。
我就尝试了把tcprouter的部分注释掉，直接查询。
结果是

{"errorCode":1,"errorMessage":"user code exception caught","stackTrace":"errCode: -502005 database collection not exists | errMsg: [ResourceNotFound] Db or Table not exist. Please check your request, but if the problem cannot be solved, contact us.; 
Error: errCode: -502005 database collection not exists | errMsg: [ResourceNotFound] Db or Table not exist. Please check your request, but if the problem cannot be solved, contact us.; 
    at Object.returnAsCloudSDKError (/var/user/node_modules/wx-server-sdk/index.js:6057:16)
    at Object.checkError (/var/user/node_modules/wx-server-sdk/index.js:1400:23)
    at Promise (/var/user/node_modules/wx-server-sdk/index.js:1468:33)
    at <anonymous>
    at process._tickCallback (internal/process/next_tick.js:188:7)"}

说是

Db or Table not exist

然后实际上是
这里有collection，也有数据
请教老师问题出在哪里？
谢谢

以下是代码
页面：

  onLoad: function (options) {
    this._loadGoodslist()
  },

  _loadGoodslist(){
    wx.showLoading({
      title: '加载中',
    })
    wx.cloud  .callFunction({
      name:'goods',
      data:{
        $url:'list',
        start:0,
        count:10,
      }
    }).then(res=>{
      this.setData({
        GoodsItem:this.data.GoodsItem.concat(res.result)
      })
    })
    wx.hideLoading()
    wx.stopPullDownRefresh()
  },

云函数：
goods index.js

// 云函数入口文件
const cloud = require('wx-server-sdk')

cloud.init()

const TcbRouter = require('tcb-router')

const db = cloud.database()

const goodsCollection = db.collection('goodsInfo')

// 云函数入口函数
exports.main = async (ev, context) => {
  // const app = new TcbRouter({
  //    ev
  // })

  // app.router('list',async (ctx,next)=>{
  //   let goodsList = await goodsCollection.get().then(res=>{
  //     return res.data
  //   })
  //   ctx.body = goodsList
  // })

  // return app.serve()


  let goodsList = goodsCollection.get().then(res=>{
    return res.data
  })
  return goodsList
}