Golang- mongodb

Question

我正在研究mongodb。

如何在排序$geoNear之后对子文档进行排序？

我想将此查询转换为弹性搜索，但是我无法分页显示每页20条评论。

db.getCollection('ratings').aggregate([
{
    // find review near user location
    $geoNear: {
        near: { type: "Point", coordinates: [ 108.220629394054 , 16.0727167550719 ] },
        distanceField: "dist.calculated",
        maxDistance: 1000000,
        query: { "score" : {$gte: 2} },
        includeLocs: "dist.location",
        num: 100000,
        spherical: true
     },
   },
   {
       // group review by business
       $group: {
           _id: "$business",
           reviewIDs: { $push: {reviewID: "$_id", score: "$score", feedback: "$feedback"}}
       }
   },
   {
       // I want sort review by score before get 5 top hits
       $sort: {"$reviewIDs.score": -1 }
   },
   {
        // top 5 review have best score
        $project: {
                reviewIDs: { $slice: [ "$reviewIDs", 5 ] }
        }
   },
   {
       $unwind: "$reviewIDs"
   },
   {
    $limit: 100
   },
])