我收到以下错误:
EloquentVehicle.php第30行中的FatalErrorException:呼叫成员 函数groupBy()on null
我有以下代码:
<?php
namespace App\Project\Frontend\Repo\Vehicle;
use Illuminate\Database\Eloquent\Model;
class EloquentVehicle implements VehicleInterface
{
protected $vehicle;
/**
* EloquentVehicle constructor.
*
* @param Model $vehicle
*/
public function __construct(
Model $vehicle
)
{
$this->$vehicle = $vehicle;
}
/**
* Fetch unique makes
*
* @return mixed
*/
public function fetchMakes()
{
return $this->vehicle->groupBy(array('make'))
->orderBy('make', 'asc')
->get();
}
}
我已经检查了Illuminate \ Database \ Eloquent \ Model中显然不存在的方法,但我不知道应该添加到我的类中,以便我可以使用groupBy方法。 laravel文档说该方法存在。
更新:显然我无法输入抽象类。我不知道我应该如何使用Eloquent来检索记录。如果有帮助,下面是我将类注册到服务容器的代码
<?php
namespace App\Providers;
use App\Vehicle;
use App\Project\Frontend\Repo\Vehicle\EloquentVehicle;
use Illuminate\Support\ServiceProvider;
class RepoServiceProvider extends ServiceProvider
{
/**
* Bootstrap the application services.
*
* @return void
*/
public function boot()
{
//
}
/**
* Register the application services.
*
* @return void
*/
public function register()
{
$this->app->bind('App\Project\Frontend\Repo\Vehicle\VehicleInterface', function($app)
{
return new EloquentVehicle(
new Vehicle
);
});
}
}
答案 0 :(得分:0)
我只是发现了自己的错误而且确实把脸埋在手掌里。
此
$this->$vehicle = $vehicle;
应该是这个
$this->vehicle = $vehicle;