微信小程序云开发sum求和，count，in查询，分页，模糊查询

pageNo:1,
  pageSize:20,
  list:[],
  isload:false,
  loadtext:'数据加载中...',
  

const db = wx.cloud.database() 
const _ = db.command;
const $ = db.command.aggregate;

getAllList() { 
  
    
    let that=this;
    let query={  tb: true,    status: Number(1)    }; 
    if(that.data.xxlx.length>0)query.xxlx=_.in(that.data.xxlx);//in查询
    if(that.data.value!='')query.content=  wx.cloud.database().RegExp({  regexp: this.data.value,  options: 'i'  })//模糊cha'xu


    if(that.data.isload){
      that.setData({loadtext:'数据加载中...'})
      return;
    }  
 that.setData({isload:true})
    if(that.data.pageNo==1){
      that.setData({allList:[],tempali:[]});
      that.getAllListCount(query);
      that.getAllListSum(query);
    }
    let pageStart=(that.data.pageNo-1)*that.data.pageSize;

   

   

     

    db.collection('actions').where(query).skip( pageStart).limit(that.data.pageSize)
      .orderBy('zd2', 'desc').orderBy('time', 'desc').get()
      .then(res => {
        console.log(res)
        let li=res.data;
        if(li.length==0){
          that.setData({ loadtext:'暂无数据',isload:false})
          return;
        } 
         
         let list=that.data.list;
        list=list.concat(li);
        that.setData({list:list , loadtext:'上拉加载更多数据',isload:false})

        if(li.length<that.data.pageSize){
          that.setData({ loadtext:'暂无数据'}) 
        }
 
      })
  },

 getAllListCount(query){
    let that=this;
   //计算总条数
    that.setData({total:0})
    db.collection('actions').where(query).count().then(res=>{
      console.log("count=",res)
      let total=res.total;
      that.setData({total:total})
    })
  },
  getAllListSum(query){ 
    let that=this;
    //计算总浏览量 
   
    that.setData({  sumNum:0  })
    
    db.collection('actions').aggregate().match(query).group({
      _id: null,
      sum: $.sum('$liulanNum')
    }).end().then(res=>{
      if(res.list.length>0){
        let sum=parseInt(res.list[0].sum);
        that.setData({  sumNum:sum  })
      }  
    })
  },