Laravel 8 动态模型工厂？

Question

我正在尝试创建一个包，允许在模型类本身内部指定模型工厂定义。

例如：

class User extends Authenticatable
{
    use LaravelUIModel, Notifiable;

    protected $hidden = ['password', 'remember_token'];
    protected $casts = ['email_verified_at' => 'datetime'];

    public function definition(Generator $faker)
    {
        return [
            'name' => $faker->name,
            'email' => $faker->unique()->safeEmail,
            'email_verified_at' => now(),
            'password' => '$2y$10$92IXUNpkjO0rOQ5byMi.Ye4oKoEa3Ro9llC/.og/at2.uheWG/igi', // password
            'remember_token' => Str::random(10),
        ];
    }
}

所以我创建了一个名为 的特征LaravelUIModel，我试图在其中指定一个动态newFactory：

trait LaravelUIModel
{
    use HasFactory;

    protected static function newFactory()
    {
        $factory = new Factory;
        $factory->setModel(static::class);

        return $factory->new();
    }
}

现在，$model工厂属性受到保护，所以我创建了自己的Factory类来扩展 EloquentFactory类，这应该允许我更改它：

class Factory extends EloquentFactory
{
    public function setModel($model)
    {
        $this->model = $model;
    }

    public function definition()
    {
        return app($this->model)->definition($this->faker);
    }
}

我不断收到此错误：

Class "App\" not found

就好像它根本没有意识到我已经设置了模型名称，因为当我打印$this->model它时，它会显示我App\Models\User.

我如何像这样动态地设置工厂 $model 以便我可以在模型类中指定定义，而不用为每个模型创建一个新的工厂文件？

Answer 1

我通过创建这个特征来实现这个工作：

use Faker\Generator;
use Illuminate\Database\Eloquent\Factories\Factory;
use Illuminate\Database\Eloquent\Factories\HasFactory;

trait HasNewFactory
{
    use HasFactory;

    protected static function newFactory()
    {
        $factory = new class extends Factory
        {
            public static $definition;

            public function definition()
            {
                $definition = static::$definition;

                return $definition($this->faker);
            }
        };

        $factory::guessModelNamesUsing(function () {
            return get_called_class();
        });

        $factory::$definition = function (Generator $faker) {
            return (new static)->definition($faker);
        };

        return $factory;
    }
}

现在在我的模型中，HasFactory我不使用 ，而是使用以下HasNewFactory特征：

use Diontron\Lucid\Traits\HasNewFactory;
use Faker\Generator;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Schema\Blueprint;

class MyModel extends Model
{
    use HasNewFactory;

    public function definition(Generator $faker)
    {
        return [
            'name' => $faker->name(),
        ];
    }
}