Javascript 使用聚合的MongoDB中嵌套数组中的getBypage

我使用mongoDB作为后端服务器，我有这样的嵌套数组（一级数组）

{
    "_id" : ObjectId("60b1fc6d3c43f74e0c1dba92"),
    "seriesId" : "60acebf73acb5b3a98d14331",
    "name" : "Season 1",
    "logoURL" : "uploads/season/1622277216401.png",
    "yearOfPublish" : "2021-05-29",
    "description" : "Season 1",
    "createdBy" : ObjectId("609cbf49ba46cc3924859ab5"),
    "createdOn" : "2021-05-29T08:33:49.480Z",
    "episode" : [ 
        {
            "seasonId" : "60b1fc6d3c43f74e0c1dba92",
            "name" : "Episode 1",
            "id" : 0,
            "logoURL" : "uploads/episode/1622278616899.png",
            "dateOfTelecast" : null,
            "description" : "sadfgh",
            "duration" : "30",
            "videoType" : "customURL",
            "embedCode" : "",
            "url" : "https://youtu.be/kbpsXMUr7ss",
            "liveboxChannel" : "",
            "createdOn" : "2021-05-29T08:56:59.230Z",
            "createdBy" : ObjectId("609cbf49ba46cc3924859ab5"),
            "_id" : "ZaVrpOLO5"
        }, 
        {
            "seasonId" : "60b1fc6d3c43f74e0c1dba92",
            "name" : "Episode 2",
            "id" : 0,
            "logoURL" : "uploads/episode/1622279206607.png",
            "dateOfTelecast" : null,
            "description" : "adfd",
            "duration" : "30",
            "videoType" : "customURL",
            "embedCode" : "",
            "url" : "https://youtu.be/kbpsXMUr7ss",
            "liveboxChannel" : "",
            "createdOn" : "2021-05-29T09:06:48.637Z",
            "createdBy" : ObjectId("609cbf49ba46cc3924859ab5"),
            "_id" : "9GKqXhxcH"
        },}

我没有更多的季节。从本季系列中，我有一个名为“插曲”的插曲数组

现在我的前端页面只需要那一集

response={spice:所有的插曲数据}

此插曲数据基于跳过和限制值

我在mongodb试过一些东西

db.getCollection('season_copy').aggregate([
{$project: {
        episodes: {
          $cond:{ if: { $isArray: "$episode" }, then: { input:"$episode" }, else: 0 }
        },
      },
    },
  ])

有人能给我一些建议吗？

看看这个：

不含骨料：

db.getCollection('season_copy')
.find({ _id: ObjectID(id)})
.project({ episode: 1 }).toArray();

加总：

db.getCollection('season_copy')
.find({ _id: ObjectID(id)})
.project({ episode: 1 }).toArray();