已解决

    db.collection('users').where({
      _id:this.data._id
    }).update({
      data:{
        collection:_.push({
          each:[{
                      _id:0,
                      name:'zs'
                     }]
            }),
            success:res=>{
          console.log('已成功添加到收藏夹')
        }
      }
    })