如何修改由模型引起的原始查询以引用外部表

Question

我现在正在使用laravel编写一个简单的比萨订购应用程序。 这是我当前的编码：

class Order extends Model {
    protected $table = 'orders';
    protected $primaryKey = 'id';
    public $timestamps = false;
    protected $fillable = ['pizzaid', 'date'];
}

class Order extends JsonResource {
    public function toArray($request) {
        return [
            'id' => $this->id,
            'pizzaid' => $this->pizzaid,
            'date' => $this->date,
            'pizzadata' => PizzaResource::collection(Pizza::where('id', $this->pizzaid)->get()),
        ];
    }
}

class Pizza extends Model {
    protected $table = 'pizzas';
    protected $primaryKey = 'id';
    public $timestamps = false;
    protected $fillable = ['name', 'price', 'detail'];
}

class Pizza extends JsonResource {
    public  function    toArray($request) {
        return [
            'id' => $this->id,
            'name' => $this->name,
            'price' => $this->price,
            'picture' => $this->picture,
            'detail' => $this->detail,
        ];
    }
}

正如您在此处看到的那样，每个订单资源必须显示Pizzaid引用的Pizza资源。但是对于每个订单资源，我的代码都执行2个订单和Pizza的SQL。我只想执行1条sql。如何修复我的代码？
数据库表“订单”已经具有带有“比萨饼”的外键。