Update multiple mysql tables with one json in php - php

Question

I've got an AngularJS frontend and got some problems relating the data layer.
In the frontend I've got contacts.
contact JSON object:
{
"id": 1,
"groupId": 1,
"firstName": "John",
"lastName": "Doe",
"email": "jd#gmail.com",
"company": "Google",
"info": "lorem ipsum dolor amet",
"numbers": [
{
"typeId": 1,
"number": "123456"
},
{
"typeId": 2,
"number": "1234567"
},
{
"typeId": 3,
"number": "8765432"
},
{
"typeId": 4,
"number": "0864235"
}
]
}
I get this object over an url with one http request.
When I will save it I give exactly this object back to the backend.
But how can I e.g. update a number out of the numbers table or the company out of the companies table with php?
My colleague said to me that when i update a number in the contact object, i have to call an url with /numbers/id .
But I just want to put back a "contact object" at /contacts
and let the business layer/data layer do the logic and split the object to update different tables.
In the backend he uses php and fat-free-framework.
Can anyone explain how to do this?
-EDIT-
And I thought the complete logic how to save the data is in the backend.
With DTO (Data Transfer Object) and DAO (Data Access Object) etc.

Answer 1

If you want to accept an object graph then you would need to parse it then make the appropriate calls to the database.
For example, presuming you have a table "numbers" that has columns "typeId" and "number" you would probably want logic in your "contact" class that does something like...
// convert the JSON to PHP
$request = json_decode($contact);
if(isset($request->numbers)) {
$number = new \DB\SQL\Mapper($this->db, "number");
// loop over your number objects
foreach($request->numbers as $data) {
// create a new number entry for each one
$number->copyfrom($data);
$number->save();
$number->reset();
}
}
Obviously how and where you do this would depend on how you have structured your code, for example contact->post() and contact->put() might be applicable places.