Peculiar Identifiers are a way to generate unique 64-bit ids to server as primary or unique keys.
class Book extends Model {
public $uid;
public $title;
public static function schema(){
return [
'uid' => Field::Peculiar(),
'title' => Field::CharField(function(Column $column){
$column->size = 255;
$column->null = true;
})
];
}
}