0
の配列でのMongoDBサブ文書エレメントのインデックスを取得する、私はこのようなMongoDBのサンプル・オブジェクトを有するオブジェクト
{
"_id" : ObjectId("5937cbec0de02a0004cb57b3"),
"usernameAsEntered" : "logan",
"platform" : "ios",
"lastName" : "Jackman",
"firstName" : "Hugh",
"androidDevices" : [],
"iosDevices" : [],
"isAgeRestrictedCategories" : [],
"role" : "celeb",
"updatedAt" : ISODate("2017-09-19T16:36:11.356Z"),
"createdAt" : ISODate("2017-06-07T09:48:28.269Z"),
"lastUpdated" : ISODate("2017-06-09T10:36:59.448Z"),
"active" : false,
"birthday" : null,
"notificationCount" : 0,
"points" : 0,
"topicLocked" : [
"msfk",
"flirty",
"dirty",
"mahesh_test"
],
"hashfriends" : [],
"blockedList" : [],
"verifiedCeleb" : true,
"celebParticipants" : [
{
"user" : ObjectId("57ab51940a993203009d8506"),
"lastPlayed" : ISODate("2017-08-28T18:01:07.763Z"),
"_id" : ObjectId("59897f4b55acb50010f80741"),
"totalQuizAnswered" : 10,
"scoreInPercentage" : 90,
"score" : 9
},
{
"user" : ObjectId("577e223df34e570300de1872"),
"lastPlayed" : ISODate("2017-09-18T08:52:33.872Z"),
"_id" : ObjectId("5996d7a01e146200104fc7da"),
"totalQuizAnswered" : 10,
"scoreInPercentage" : 90,
"score" : 9
},
{
"user" : ObjectId("59bf6d53373af70011475b6d"),
"lastPlayed" : ISODate("2017-09-18T07:55:42.794Z"),
"_id" : ObjectId("59bf7ba5373af70011475b9d"),
"totalQuizAnswered" : 10,
"scoreInPercentage" : 80,
"score" : 8
},
{
"user" : ObjectId("5979f782be0970001abdc93b"),
"lastPlayed" : ISODate("2017-08-29T15:51:37.758Z"),
"_id" : ObjectId("59a584bba8ed1400100b8b1d"),
"totalQuizAnswered" : 7,
"scoreInPercentage" : 100,
"score" : 7
},
{
"user" : ObjectId("5755981ae2565d0300be2b4d"),
"lastPlayed" : ISODate("2017-08-25T03:27:38.653Z"),
"_id" : ObjectId("5988924e809e050010bf7011"),
"totalQuizAnswered" : 10,
"scoreInPercentage" : 70,
"score" : 7
},
{
"user" : ObjectId("571759ac1f86f003002dacfa"),
"lastPlayed" : ISODate("2017-09-05T09:01:56.949Z"),
"_id" : ObjectId("59ae677aaf24fa001083eeb3"),
"totalQuizAnswered" : 10,
"scoreInPercentage" : 60,
"score" : 6
},
{
"user" : ObjectId("599a88a41e17140010eca45a"),
"lastPlayed" : ISODate("2017-08-22T09:25:29.592Z"),
"_id" : ObjectId("599bf8184ff8d70010ef3167"),
"totalQuizAnswered" : 10,
"scoreInPercentage" : 40,
"score" : 4
},
{
"user" : ObjectId("58e72582e8b311000448ac22"),
"lastPlayed" : ISODate("2017-08-07T18:40:13.364Z"),
"_id" : ObjectId("5988b39555acb50010f806f1"),
"totalQuizAnswered" : 5,
"scoreInPercentage" : 60,
"score" : 3
},
{
"user" : ObjectId("58e72580e8b311000448ac1d"),
"lastPlayed" : ISODate("2017-08-07T18:10:20.652Z"),
"_id" : ObjectId("598899c1809e050010bf7017"),
"totalQuizAnswered" : 7,
"scoreInPercentage" : 43,
"score" : 3
},
{
"user" : ObjectId("5979f33abe0970001abdc91d"),
"lastPlayed" : ISODate("2017-08-29T07:15:35.251Z"),
"_id" : ObjectId("599b45cf4ff8d70010ef311c"),
"totalQuizAnswered" : 2,
"scoreInPercentage" : 100,
"score" : 2
},
{
"user" : ObjectId("59885cda809e050010bf6f99"),
"lastPlayed" : ISODate("2017-08-07T17:33:21.426Z"),
"_id" : ObjectId("59889921809e050010bf7014"),
"totalQuizAnswered" : 2,
"scoreInPercentage" : 100,
"score" : 2
},
{
"user" : ObjectId("59bf75c7373af70011475b91"),
"lastPlayed" : ISODate("2017-09-19T16:36:11.336Z"),
"_id" : ObjectId("59c1469c49e8650011ec8655"),
"totalQuizAnswered" : 7,
"scoreInPercentage" : 29,
"score" : 2
},
{
"user" : ObjectId("58e72580e8b311000448ac1e"),
"lastPlayed" : ISODate("2017-08-07T11:44:45.299Z"),
"_id" : ObjectId("59885299809e050010bf6f78"),
"totalQuizAnswered" : 2,
"scoreInPercentage" : 50,
"score" : 1
},
{
"user" : ObjectId("59bf49b6373af70011475aa6"),
"lastPlayed" : ISODate("2017-09-18T04:22:58.904Z"),
"_id" : ObjectId("59bf4a22373af70011475aab"),
"totalQuizAnswered" : 1,
"scoreInPercentage" : 100,
"score" : 1
},
{
"user" : ObjectId("5980872c1ab7740010e1982f"),
"lastPlayed" : ISODate("2017-08-01T13:56:44.261Z"),
"_id" : ObjectId("5980889c1ab7740010e1983e"),
"totalQuizAnswered" : 1,
"scoreInPercentage" : 100,
"score" : 1
},
{
"user" : ObjectId("59bb532f7b920a0011415034"),
"lastPlayed" : ISODate("2017-09-15T04:15:29.500Z"),
"_id" : ObjectId("59bb53e17b920a001141503b"),
"totalQuizAnswered" : 1,
"scoreInPercentage" : 0,
"score" : 0
},
{
"user" : ObjectId("59bb62c57b920a001141509a"),
"lastPlayed" : ISODate("2017-09-15T05:23:10.433Z"),
"_id" : ObjectId("59bb63be7b920a001141509d"),
"totalQuizAnswered" : 1,
"scoreInPercentage" : 0,
"score" : 0
}
],
"friends" : [],
"meta" : {
"totalInvites" : 0,
"totalFriends" : 0
},
"isDeleted" : false,
"__v" : 298,
"avatarUrl" : "https://1.soompi.io/wp-content/uploads/2015/10/hugh-jackman.jpg",
"lastActivity" : null,
"lastNudged" : ISODate("2016-04-25T06:46:38.267Z")
}
celebParticipantsアレイは数十オブジェクトの何千ものがあるかもしれません保存されます。
ユーザーBのcelebParticipants配列からユーザーAの索引をフェッチしたい場合は、ユーザー・パラメーター、つまり、ユーザー・パラメーターだけを使用して達成するにはどうすればよいでしょうか？上記と同じコレクション。
私は
let index = await models.User.aggregate([
{'$match': {_id: mongoose.Schema.Types.ObjectId(req.params.id)}},
{
'$project':
{
'index': { '$indexOfArray': [ "$celebParticipants",
//can't just put in userId
mongoose.Schema.Types.ObjectId(userId)] },
}
}
]);
、このようなものを使用してみました。しかし、ユーザーがオブジェクトの一部であり、配列だけで、ユーザーIDの配列ではありませんので、これは、動作しないでしょう。すべてのデータをフェッチし、後でそれを反復するか、mapreduceを使用する以外に、これを達成する方法がありますか？ ご協力いただければ幸いです。
てみ '{ '$プロジェクト'： { 'インデックス'：{ '$ indexOfArray'：[あなたは、サブフィールドcelebParticipants._idない配列で一致する必要があるため._idの追加を注意してください"$ celebParticipants.user"、 mongoose.Schema.Types.ObjectId（userId）]} } } '' – Veeram