Find and sort array of array in nested documents - mongodb

Question

My collection schema is like this:
{
"_id" : ObjectId("5f0c64e4dd0a36b93c7deafa"),
"name" : "Asd",
"email" : "asd#asd.com",
"password" : "$2b$12$66OTK8mSWELMF5YiF9HMUuHEeOVLI61aINjWs1Cmn1699lLJfz/7y",
"auto_ml" : true,
"notification" : true,
"photo" : null,
"tariff_id" : NumberInt(1),
"city" : null,
"sub_district" : null,
"village" : null,
"latitude" : null,
"longitude" : null,
"created_at" : ISODate("2020-07-13T20:43:00.871+0000"),
"updated_at" : ISODate("2020-07-13T23:08:26.149+0000"),
"family_members" : [
],
"rooms" : [
{
"_id" : ObjectId("5f0c98826f0321f6986755da"),
"name" : "Ruang Makan",
"created_at" : ISODate("2020-07-14T00:23:14.839+0000"),
"updated_at" : ISODate("2020-07-14T00:23:14.840+0000"),
"devices" : [
]
},
{
"_id" : ObjectId("5f0c98876f0321f6986755dd"),
"name" : "Ruang Tamu",
"created_at" : ISODate("2020-07-14T00:23:19.693+0000"),
"updated_at" : ISODate("2020-07-14T19:00:08.281+0000"),
"devices" : [
{
"serial_number" : "ST9L0CY4A2AVY7HFWWUE",
"used_relay" : NumberInt(0),
"created_at" : ISODate("2020-07-14T16:56:22.156+0000"),
"updated_at" : ISODate("2020-07-14T16:56:22.156+0000"),
"sensors" : [
{
"_id" : ObjectId("5f0db478ca203bde99d2438e"),
"name" : "Temperature",
"value" : null,
"created_at" : ISODate("2020-07-14T20:34:48.134+0000"),
"updated_at" : ISODate("2020-07-14T20:34:48.134+0000")
},
{
"_id" : ObjectId("5f0dbe0563ccbcb2a2aecc04"),
"name" : "Motion",
"value" : null,
"created_at" : ISODate("2020-07-14T21:15:33.135+0000"),
"updated_at" : ISODate("2020-07-14T21:15:33.135+0000")
},
{
"_id" : ObjectId("5f0dc0412022e93af338316f"),
"name" : "Humidity",
"value" : null,
"created_at" : ISODate("2020-07-14T21:25:05.126+0000"),
"updated_at" : ISODate("2020-07-14T21:25:05.126+0000")
},
{
"_id" : ObjectId("5f0dc0442022e93af3383170"),
"name" : "Light",
"value" : null,
"created_at" : ISODate("2020-07-14T21:25:08.451+0000"),
"updated_at" : ISODate("2020-07-14T21:25:08.451+0000")
}
],
"switches" : [
]
}
]
}
]
}
The question is, how could i access the array sensors inside device with "serial_number": "ST9L0CY4A2AVY7HFWWUE" and inside room with id ObjectId("5f0c98876f0321f6986755dd"), and the sort the sensors by id? I've tried the projection way and aggregate way but the result is not as i expected. My expected result is only showing the array of sensors like:
"sensors" : [
{
"_id" : ObjectId("5f0db478ca203bde99d2438e"),
"name" : "Temperature",
"value" : null,
"created_at" : ISODate("2020-07-14T20:34:48.134+0000"),
"updated_at" : ISODate("2020-07-14T20:34:48.134+0000")
},
{
"_id" : ObjectId("5f0dbe0563ccbcb2a2aecc04"),
"name" : "Motion",
"value" : null,
"created_at" : ISODate("2020-07-14T21:15:33.135+0000"),
"updated_at" : ISODate("2020-07-14T21:15:33.135+0000")
},
{
"_id" : ObjectId("5f0dc0412022e93af338316f"),
"name" : "Humidity",
"value" : null,
"created_at" : ISODate("2020-07-14T21:25:05.126+0000"),
"updated_at" : ISODate("2020-07-14T21:25:05.126+0000")
},
{
"_id" : ObjectId("5f0dc0442022e93af3383170"),
"name" : "Light",
"value" : null,
"created_at" : ISODate("2020-07-14T21:25:08.451+0000"),
"updated_at" : ISODate("2020-07-14T21:25:08.451+0000")
}
],
Query that i have tried:
db.users.aggregate([
{
$match: { "_id": ObjectId("5f0c64e4dd0a36b93c7deafa") }
},
{ $unwind: "$rooms" },
{
$match: {
"rooms._id": ObjectId("5f0c98876f0321f6986755dd")
}
},
{ $unwind: "$rooms.devices" },
{
$match: {
"rooms.devices.serial_number": "ST9L0CY4A2AVY7HFWWUE"
}
},
{
$project: { "rooms.devices.sensors": 1 }
},
{
$group: {
_id: "$_id",
sensors: { $first: "$rooms.devices.sensors" }
}
},
{
$sort: { "rooms.devices.sensors._id": -1}
},
])
But the sensors doesn't seem to be sorted.
Thanks in advance for your help~