这里我想调用getgood函数将数据保存到goodlist中，再显示到页面中，但在加载完毕前已经渲染完了，不显示已经加载的数据，如何解决？

onLoad: function (options) {
        this.getData();
        this.getpos();
    },
getpos(){
        var  c= wx.getStorageSync('com');
        var that = this;
            db.collection('Post').where({  //获取全部贴文
                major:c,
            }).orderBy('time','desc').get()
            .then(res=>{
                that.setData({
                    postlist:res.data
                })
                that.getgood().then(res=>{
                    console.log(res)
                })
            })
            .catch(err=>{
                console.log("无法获取",err)
            })
    },
  getgood(){
        var poslist = this.data.postlist;
        var list = [];
        var id = wx.getStorageSync('info').id
        var that = this;
        return new Promise((resolve, reject) => {
            for(let i =0;i<poslist.length;i++)
            {
                db.collection('Good')
                .where({
                    pid:poslist[i]._id,
                    uid:id,
                })
                .get()
                .then(res=>{
                    if(res.data.length==0)
                    {
                        list.push(false)
                    }
                    else
                        list.push(true)
                })
                if(i+1==poslist.length)
                {
                    that.setData({
                        goodlist:list
                    })
                    resolve(list);
                }
            }
        })
    },