Mapping property names

Sometimes you might want to change the name of a property in the transformed payload, with attributes this is possible:

class ContractData extends Data
{
    public function __construct(
        public string $name,
        #[MapOutputName('record_company')]
        public string $recordCompany,
    ) {
    }
}

Now our array looks like this:

[
    'name' => 'Rick Astley',
    'record_company' => 'RCA Records',
]

Changing all property names in a data object to snake_case as output data can be done as such:

#[MapOutputName(SnakeCaseMapper::class)]
class ContractData extends Data
{
    public function __construct(
        public string $name,
        public string $recordCompany,
    ) {
    }
}

You can also use the MapName attribute when you want to combine input and output property name mapping:

#[MapName(SnakeCaseMapper::class)]
class ContractData extends Data
{
    public function __construct(
        public string $name,
        public string $recordCompany,
    ) {
    }
}

You can now create a data object as such:

$contract = new ContractData(
    name: 'Rick Astley',
    recordCompany: 'RCA Records',
);

And a transformed version of the data object will look like this:

[
    'name' => 'Rick Astley',
    'record_company' => 'RCA Records',
]