Implementing an advanced API

Until now, we’ve been working with a very simple database, and implementing pretty straightforward APIs. From time to time, however, your client will ask for something more difficult or complex. Let’s take a look at one such requirement.

The client has asked for the ability to see a car with all its options. We’ll provide that in JSON for easy display on the web, phone, and so on. The JSON will look like this:

{
    "id": 2,
    "name": "buick skylark 320",
    "mpg": null,
    "cylinders": null,
    "displacement": null,
    "horsepower": null,
    "weight": null,
    "acceleration": null,
    "modelYear": null,
    "origin&quot...