Eloquent uuid as primary key

uuid_as_primary_eloquent.php

<?php

public static function boot()
{
    parent::boot();

    $callback = function (Model $model) {
        $model->setKeyType('string');
        $model->setIncrementing(false);

        if (! $model->getKey()) {
            $model->{$model->getKeyName()} = \Str::uuid();
        }
    };

    static::creating($callback);
    static::retrieved($callback);
}