Mongoose Querying Sub-Document Properties - node.js

Question

I am trying to expose this functionality through a WEB API. The way it is set up in this code is that someone does a GET on URL providing a querystring along with it in the form of:
?field=value&anotherfield.subproperty=value
But I can't seem to get querying based on sub-document properties to work. Below you will find my barebones code, record I'm trying to receive and both of my test cases.
Code:
var express = require('express');
var router = express.Router();
var mongoose = require('mongoose');
var config = require('../config');
var User = require('../models/user');
var functions = require('../functions');
router.get('/', function(req,res,next) {
//Check Permissions associated with UID *TODO
var parameters = req.query;
console.log(parameters);
User.find(parameters, function(err, users) {
if (err)
{
json = functions.generateOperationOutcome("exception","error",err,"exception");
res.status(500);
res.json(json);
}
else
{
//Check for blank result
if (users.length === 0)
{
json = functions.generateOperationOutcome("not-found","warning","Non-Existent Resource","warning");
res.status(404);
res.json(json);
}
else {
res.status(200);
res.json(users);
}
}
});
});
Record:
{
"_id": "5871d2e814946a941d8611fb",
"resourceType": "testResource",
"link": [],
"communication": [],
"animal": {
"genderStatus": {
"coding": []
},
"breed": {
"coding": []
},
"species": {
"coding": []
}
},
"contact": [],
"photo": [],
"maritalStatus": {
"coding": []
},
"address": [],
"gender": "unknown",
"telecom": [
{
"system": "phone",
"value": "2019196553",
"use": "home"
}
],
"name": {
"suffix": [],
"prefix": [],
"given": [],
"family": []
},
"identifier": [
{
"use": "official",
"type": {
"coding": {
"system": "kylec laptop",
"version": "0.01",
"code": "UDI",
"display": "Universal Device Identifier",
"userSelected": false
},
"text": "test"
},
"system": "test system",
"value": "test value",
"assigner": {
"reference": "test assigner reference"
},
"period": {
"start": "1992-12-31T09:59:59+00:00"
}
}
]
}
Successful Query:
GET http://{{LOCAL}}/api/user?resourceType=testResource
Returns this one model from MongoDB.
Unsuccessful Query (no documents matching query found):
GET http://{{LOCAL}}/api/user?telecom.system=phone
Returns no models back and results in a 404.

Answer 1

You are not properly using dot-notation, as the property you're seeking is within an array:
"telecom": [
{
"system": "phone",
"value": "2019196553",
"use": "home"
}
]
Querying array content typically would require you to do a join against the array (for DocumentDB queries), and not a simple find().
If you wanted the ability to use dot-notation here, you'd need to create a subdocument, like:
"telecom": {
"system": "phone",
"value": "2019196553",
"use": "home"
}
At this point, you'd be able to address properties such as telecom.system, telecom.value, and telecom.use.