Best practice Backand regarding JSON transformation and related objects - angularjs

Question

I am currently trying to figure out how to setup my Backand app and its REST API. This question is related to question: Backand deep querying. However, I was hoping that I could get some best practice code examples on how to perform server side code to perform a loop and create a JSON responds with the following criteria:
I want to be able to make a REST request to Backand and get one data object back that has manipulated/merged two data objects from my database.
I have an object called "media" and another named "users". Obviously, users contain user information and media contains information on a picture that the user has uploaded. The two objects are related by the userId and by collection set in Backand. I want to make a GET request that responds with a JSON object with all pictures and a nested user object on each picture object that contains the related user information. I know that I get back "relatedObjects", and I could then make some manipulation on the client side, but I am hoping that there is another easier way to do this from the Backand administration system either on server side code or as a query.
So, my question is, what's the best way to produce a REST call that responds a database object with nested related data object through Backand?
Here's the object models (shorten for clarity):
User object model as set up in Backand
{
"name": "users",
"fields": {
"media": {
"collection": "media",
"via": "user"
},
"email": {
"type": "string"
},
"firstName": {
"type": "string"
},
"lastName": {
"type": "string"
}
} }
Media object model as set up in Backand
{
"name": "media",
"fields": {
"description": {
"type": "string"
},
"thumbnail": {
"type": "string"
},
"fullImage": {
"type": "string"
},
"user": {
"object": "users"
}
}}
Final JSON response that I am looking for:
{
description: 'Blah',
thumbnail: 'someImageUrl.jpg',
fullImage: 'someImageUrl.jpg',
user: {
firstName: 'John'
lastName: 'Smith'
email: 'john#smith.com'
}
}

Answer 1

Just in case anybody else comes across this, I chose to do it with server-side javascript code, since my backend, SQL and NoSQL query skills are very weak. I'm guessing a noSQL query would probably be better in terms of performance. And I would still like to see how it could be done in noSQL. Anyway my server-side javascript code in a Backand action does the job. Here it is:
/* globals
$http - Service for AJAX calls
CONSTS - CONSTS.apiUrl for Backands API URL
Config - Global Configuration
socket - Send realtime database communication
files - file handler, performs upload and delete of files
request - the current http request
*/
'use strict';
function backandCallback(userInput, dbRow, parameters, userProfile) {
var response = [];
var request =
$http({
method: "GET",
url: CONSTS.apiUrl + "/1/objects/media",
headers: {"Authorization": userProfile.token},
params: {
exclude: 'metadata',
deep: true
}
});
var object = request.data;
var related = request.relatedObjects.users;
for (media in object) {
if (object.hasOwnProperty(media)) {
for (user in related) {
if (object[media].user == related[user].id) {
response.push({
id: object[media].id,
thumbnailUrl: object[media].thumbnail,
description: object[media].description,
fullName: related[user].firstName + ' ' + related[user].lastName,
email: related[user].email
});
}
}
}
}
return response;
}