Requirements:

• Go 1.19
• Configured PostgreSQL 14.5 database (put the credentials into the DBInit() function in ./cmd/main.go file)

Database structure:

Relations and completion of them:

• Manufacturer

  • has many cars ✔

• Car

  • belongs to a manufacturer ✔
  • has one engine ✔
  • has many photos ✔

• Photo

  • belongs to a car ✔

• Engine

  • belongs to a car ❌

Endpoints:

You can find request bodies to specific endpoints under the table.

HTTP Method	URI	Action
-----	Manufacturers	-----
GET	/manufacturers	Get all the manufacturers
1. POST	/manufacturers	Create a manufacturer
GET	/manufacturers/:manufacturerID	Get a manufacturer
2. PUT	/manufacturers/:manufacturerID	Update a manufacturer
DELETE	/manufacturers/:manufacturerID	Delete a manufacturer
-----	Cars of the manufacturer	-----
GET	/manufacturers/:manufacturerID/cars	Get all the cars of the manufacturer
3. POST	/manufacturers/:manufacturerID/cars	Create a car under the manufacturer
GET	/manufacturers/:manufacturerID/cars/:carID	Get a car of the manufacturer
4. PUT	/manufacturers/:manufacturerID/cars/:carID	Update a car of the manufacturer
DELETE	/manufacturers/:manufacturerID/cars/:carID	Delete a car of the manufacturer
-----	Engine of the car	-----
5. POST	/manufacturers/:manufacturerID/cars/:carID/engine	Create an engine under the car
GET	/manufacturers/:manufacturerID/cars/:carID/engine	Get an engine of the car
6. PUT	/manufacturers/:manufacturerID/cars/:carID/engine	Update an engine of the car
DELETE	/manufacturers/:manufacturerID/cars/:carID/engine	Delete an engine of the car
-----	Photos of the car	-----
GET	/manufacturers/:manufacturerID/cars/:carID/photos	Get all the photos of the car
7. POST	/manufacturers/:manufacturerID/cars/:carID/photos	Upload a photo to the car
8. PUT	/manufacturers/:manufacturerID/cars/:carID/photos/orders	Update the order of the photos of the car
DELETE	/manufacturers/:manufacturerID/cars/:carID/photos/:photoID	Delete a photo of the car

Request bodies for numbered endpoints above:

1. Create a manufacturer

{
    "title": "BMW",
    "foundation_year": 1916,
    "logo": "https://upload.wikimedia.org/wikipedia/commons/f/f4/BMW_logo_%28gray%29.svg"
}

2. Update a manufacturer

{
    "title": "BMW",
    "foundation_year": 1916,
    "logo": "https://upload.wikimedia.org/wikipedia/commons/thumb/4/44/BMW.svg/2048px-BMW.svg.png"
}

3. Create a car under the manufacturer

{
    "model_name": "BMW E34 5 Series 525td",
    "top_speed": 194,
    "zero_to_hundred_time": 12900,
    "fuel_tank_capacity": 80000,
    "length": 4720,
    "width": 1751,
    "height": 1412,
    "weight": 1465000
}

My choice:

• Speed is in kilometers/hour
• Time is in milliseconds
• Capacity is in milliliters
• Length, width and height are in millimeters
• Weight is in milligrams
• Information about the cars was obtained from the https://www.ultimatespecs.com

You can use the app as you want. Use any units you prefer.

4. Update a car of the manufacturer

{
    "model_name": "BMW E34 5 Series 525td",
    "top_speed": 194,
    "zero_to_hundred_time": 12900,
    "fuel_tank_capacity": 80000,
    "length": 4720,
    "width": 1751,
    "height": 1412,
    "weight": 1465000
}

5. Create an engine under the car

{
    "type": "Inline",
    "number_of_cylinders": 6,
    "fuel_type": "Diesel"
}

6. Update an engine of the car

{
    "type": "Inline",
    "number_of_cylinders": 6,
    "fuel_type": "Petrol"
}

7. Upload a photo to the car (form-data)

{
    "photo": uploaded file in form-data
}

8. Update the order of the photos of the car

{
    "photos_ids": [
        12,
        10,
        9,
        11
    ]
}