我有 API 资源，我在 API 控制器中调用它，因此它返回我的数据，我需要在此 API 中添加一个额外的过滤器，但我不确定如何？
Resource
<?php
namespace App\Http\Resources;
use Illuminate\Http\Resources\Json\JsonResource;
use App\Http\Resources\PostResource;
class CategoryResource extends JsonResource
{
/**
* Transform the resource into an array.
*
* @param \Illuminate\Http\Request $request
* @return array
*/
public function toArray($request)
{
return [
'id' => $this->id,
'title' => $this->title,
'image' => url('images', $this->photo),
'url' => $this->slug,
'posts' => PostResource::collection($this->whenLoaded('posts')),
'created_at' => (string) $this->created_at,
'updated_at' => (string) $this->updated_at,
];
}
}
Controller
<?php
namespace App\Http\Controllers\API;
use Illuminate\Http\Request;
use App\Http\Controllers\Controller;
use App\Http\Resources\CategoryResource;
use App\Category;
class CategoryController extends Controller
{
public function index(){
$categories = CategoryResource::collection(Category::where('status', '1')->with('posts')->orderby('id', 'desc')->get());
return response()->json($categories);
}
}
知道如何在我的控制器中添加该过滤器吗？
您可以使用如下has函数过滤至少有一篇文章的类别：
Category::where('status', '1')->with('posts')->has('posts')->orderby('id', 'desc')->get();
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