How to get ids of parents based on deeply nested sub document? - mongodb

Question

This question is in continuation with older question: Parent.save() not working when sub document / deeply nested document is modified
Say I have a document as below :
{
"apiCallCount": 1,
"_id": "5e0da052b4b3fe5188602e11",
"email": "abc#def.net",
"password": "123123",
"userName": "username",
"companyName": "companyName",
"apiKey": "apiKey",
"solutionType": "solutionType",
"parentCompany": "parentCompany",
"buildings": [
{
"gateways": [
{
"devices": [
{
"_id": "5e0da052b4b3fe5188602e15",
"serialNumber": "serialNumber 1",
"area": "area",
"connectionStatus": 0,
"gatewayKey": "gatewayKey",
"applicationNumber": 11,
"firmwareVersion": "firmwareVersion",
"needsAttention": true,
"verificationCode": "123456",
"patientRiskStatus": "patientRiskStatus",
"patientFirstName": "UPDATED!!!",
"patientLastName": "patientLastName",
"createdAt": "2020-01-02T07:48:34.287Z",
"updatedAt": "2020-01-02T07:48:34.287Z"
},
{
"_id": "5e0da052b4b3fe5188602e14",
"serialNumber": "serialNumber 2",
"area": "area",
"connectionStatus": 0,
"gatewayKey": "gatewayKey",
"applicationNumber": 22,
"firmwareVersion": "firmwareVersion",
"needsAttention": true,
"verificationCode": "987654",
"patientRiskStatus": "patientRiskStatus",
"patientFirstName": "patientFirstName",
"patientLastName": "patientLastName",
"createdAt": "2020-01-02T07:48:34.288Z",
"updatedAt": "2020-01-02T07:48:34.288Z"
}
],
"_id": "5e0da052b4b3fe5188602e13",
"gatewayName": "gatewayName 1",
"gatewayKey": "gatewayKey",
"suite": "suite",
"createdAt": "2020-01-02T07:48:34.288Z",
"updatedAt": "2020-01-02T07:48:34.288Z"
}
],
"_id": "5e0da052b4b3fe5188602e12",
"buildingName": "buildingName 1",
"address": "address",
"suite": "suite",
"floor": "floor",
"timeZone": "String",
"createdAt": "2020-01-02T07:48:34.288Z",
"updatedAt": "2020-01-02T07:48:34.288Z"
}
],
"createdAt": "2020-01-02T07:48:34.289Z",
"updatedAt": "2020-01-02T09:10:25.200Z",
"__v": 0
}
I am able to dig through document and able to get device sub document with "verificationCode": "123456"
Now I want to get gatewayID(one level up) and buildingID(two level up) for this device.
Currently I have a call like this :
I am trying to update parent doc based on deeply nested sub-document.
I get sub document by accountId and verification code like below.
and then need to update the parent.
In my sample below I Put hard-coded ids which i need to get run time.
if (newlySavedUser) {
try {
let result = await Account.findByIdAndUpdate(
accountId,
{
$set: {
"buildings.$[building].gateways.$[gateway].devices.$[device].patientFirstName": "userName",
"buildings.$[building].gateways.$[gateway].devices.$[device].patientLastName": "userName1"
}
},
{
arrayFilters: [
{ "building._id": ObjectId("5d254bb179584ebcbb68b712") }, /// <---- I want to get this buildingId
{ "gateway._id": ObjectId("5d254b64ba574040d9632ada") }, /// <---- I want to get this gatewayId
{ "device.verificationCode": "4144" } /// <-- based on this verificationCode
],
new: true
}
);
if (!result) return res.status(404);
console.log(result)
//res.send(result);
} catch (err) {
console.log(err);
res.status(500).send("Something went wrong");
}
}
Trying "tom slabbaert" solution for aggregate.
Account.aggregate([
{
$unwind: "$buildings"
},
{
$unwind: "$gateways"
},
{
$match: {
"buildings.gateways.devices.verificationCode": "4144"
}
},
{
$project: {
buildingID: "$buildings._id",
gatewayID: "$gateways._id",
}
}
]).exec((err, result)=>{
console.log("result", result)
if(err) throw err;
});
Your help is appreciated.

Answer 1

You can use this 3 level $unwind aggregation, and then match the document you want:
db.collection.aggregate([
{
$unwind: "$buildings"
},
{
$unwind: "$buildings.gateways"
},
{
$unwind: "$buildings.gateways.devices"
},
{
$match: {
"buildings._id": "5e0da052b4b3fe5188602e12",
"buildings.gateways._id": "5e0da052b4b3fe5188602e13",
"buildings.gateways.devices.verificationCode": "123456"
}
}
])
This will give you the following result:
[
{
"__v": 0,
"_id": "5e0da052b4b3fe5188602e11",
"apiCallCount": 1,
"apiKey": "apiKey",
"buildings": {
"_id": "5e0da052b4b3fe5188602e12",
"address": "address",
"buildingName": "buildingName 1",
"createdAt": "2020-01-02T07:48:34.288Z",
"floor": "floor",
"gateways": {
"_id": "5e0da052b4b3fe5188602e13",
"createdAt": "2020-01-02T07:48:34.288Z",
"devices": {
"_id": "5e0da052b4b3fe5188602e15",
"applicationNumber": 11,
"area": "area",
"connectionStatus": 0,
"createdAt": "2020-01-02T07:48:34.287Z",
"firmwareVersion": "firmwareVersion",
"gatewayKey": "gatewayKey",
"needsAttention": true,
"patientFirstName": "UPDATED!!!",
"patientLastName": "patientLastName",
"patientRiskStatus": "patientRiskStatus",
"serialNumber": "serialNumber 1",
"updatedAt": "2020-01-02T07:48:34.287Z",
"verificationCode": "123456"
},
"gatewayKey": "gatewayKey",
"gatewayName": "gatewayName 1",
"suite": "suite",
"updatedAt": "2020-01-02T07:48:34.288Z"
},
"suite": "suite",
"timeZone": "String",
"updatedAt": "2020-01-02T07:48:34.288Z"
},
"companyName": "companyName",
"createdAt": "2020-01-02T07:48:34.289Z",
"email": "abc#def.net",
"parentCompany": "parentCompany",
"password": "123123",
"solutionType": "solutionType",
"updatedAt": "2020-01-02T09:10:25.200Z",
"userName": "username"
}
]
Mongoplayground

Answer 2

A simple aggregation would suffice:
db.collection.aggregate([
{
$unwind: "$buildings"
},
{
$unwind: "$buildings.gateways"
},
{
$match: {
"buildings.
gateways.devices.verificationCode": "123456"
}
},
{
$project: {
buildingID: "$buildings._id",
gatewayID: "$gateways._id",
}
}
])
If its possible to get duplicates you can $group on buildingID to avoid that.