Eloquent Casting

class Song extends Model
{
    protected $casts = [
        'artist' => ArtistData::class,
    ];
}

Song::create([
    'artist' => new ArtistData(name: 'Rick Astley', age: 22),
]);

Song::create([
    'artist' => [
        'name' => 'Rick Astley',
        'age' => 22
    ]
]);

Song::findOrFail($id)->artist; // ArtistData object

abstract class RecordConfig extends Data
{
    public function __construct(
        public int $tracks,
    ) {}
}

class CdRecordConfig extends RecordConfig
{
    public function __construct(
        int $tracks,
        public int $bytes,
    ) {
        parent::__construct($tracks);
    }
}

class VinylRecordConfig extends RecordConfig
{
    public function __construct(
        int $tracks,
        public int $rpm,
    ) {
        parent::__construct($tracks);
    }
}

class Record extends Model
{
    protected $casts = [
        'config' => RecordConfig::class,
    ];
}

$cdRecord = Record::create([
    'config' => new CdRecordConfig(tracks: 12, bytes: 1000),
]);

$vinylRecord = Record::create([
    'config' => new VinylRecordConfig(tracks: 12, rpm: 33),
]);

$cdRecord->config; // CdRecordConfig object
$vinylRecord->config; // VinylRecordConfig object

{
    "type": "\\App\\Data\\CdRecordConfig",
    "data": {
        "tracks": 12,
        "bytes": 1000
    }
}

class Record extends Model
{
    protected $casts = [
        'configs' => DataCollection::class . ':' . RecordConfig::class,
    ];
}

use Spatie\LaravelData\Support\DataConfig;

app(DataConfig::class)->enforceMorphMap([
    'cd_record_config' => CdRecordConfig::class,
    'vinyl_record_config' => VinylRecordConfig::class,
]);

class Artist extends Model
{
    protected $casts = [
        'songs' => DataCollection::class.':'.SongData::class,
    ];
}

Artist::create([
    'songs' => [
        new SongData(title: 'Never gonna give you up', artist: 'Rick Astley'),
        new SongData(title: 'Together Forever', artist: 'Rick Astley'),
    ],
]);

// Or with arrays
Artist::create([
    'songs' => [
        ['title' => 'Never gonna give you up', 'artist' => 'Rick Astley'],
        ['title' => 'Together Forever', 'artist' => 'Rick Astley']
    ],
]);

class Song extends Model
{
    protected $casts = [
        'artist' => ArtistData::class . ':default',
    ];
}

class ArtistData extends Data 
{
    public string $name = 'Default name';
}

Song::findOrFail($id)->artist->name; // 'Default name'

class Artist extends Model
{
    protected $casts = [
        'songs' => DataCollection::class.':'.SongData::class.',default',
    ];
}

$artist = Artist::create([
    'songs' => null
]);

$artist->songs; // DataCollection
$artist->songs->count(); // 0

class Artist extends Model
{
    protected $casts = [
        'songs' => DataCollection::class.':'.SongData::class.',encrypted',
    ];
}