Question

我用分形包对一些API方法进行了输出以输出内容。当我调用特定资源时，一切都会返回空白。

要检查一切是否正常，我在中间执行了一些内容变量的打印。例如，如果我在索引函数中获取$ incidents变量，则会按预期返回数据库中的所有条目。

当我在API控制器的respondWithCollection方法中调用$ collection变量时，情况也是如此。这里也有数据。但浏览器输出只是这样：

{

"data": {
"headers": {}
}
}

为了简单起见，这是显示数据库所有结果的方法：

class ApiIncidentsController extends ApiController {

    protected $incidentTransformer;
    protected $fractal;

    function __construct(IncidentTransformer $incidentTransformer){
        $this->incidentTransformer = $incidentTransformer;
        $this->beforeFilter('auth.basic', ['on' => 'post']);
        $this->fractal = new Manager();
        parent::__construct($this->fractal);
    }

    public function index()
    {
        $incidents = Incident::all();

        if( ! $incidents) {
            return Response::json([
                'error' => [
                    'message' => 'There are no incidents in the database.',
                    'code' => 100
                ]
            ], 404);
        } else {
            return $this->respond([
                'data' => $this->respondWithCollection($incidents, new IncidentTransformer),
            ]);
        }
    }

管理这些调用的API控制器是：

class ApiController extends Controller {

    protected $statusCode = 200;
    protected $fractal;

    public function __construct(Manager $fractal) {
        $this->fractal = $fractal;
    }

    public function getStatusCode() {
        return $this->statusCode;
    }

    public function setStatusCode($statusCode) {
        $this->statusCode = $statusCode;
        return $this;
    }

    public function respond($data, $headers = []) {
        return Response::json($data, $this->getStatusCode(), $headers);
    }

    protected function respondWithItem($item, $callback) {
        $resource = new Item($item, $callback);
        $rootScope = $this->fractal->createData($resource);
        return $this->respondWithArray($rootScope->toArray());
    }

    protected function respondWithArray(array $array, array $headers = []) {
        return Response::json($array, $this->statusCode, $headers);
    }

    protected function respondWithCollection($collection, $callback) {
        $resource = new Collection($collection, $callback);
        $rootScope = $this->fractal->createData($resource);
        return $this->respondWithArray($rootScope->toArray());
    }

更新1 这是IncidentTransformer：

use League\Fractal\TransformerAbstract;


class IncidentTransformer extends TransformerAbstract {
    public function transform(Incident $incident) {
        return [
            'incidentReference' => $incident['incidentReference'],
            'latitude' => $incident['latitude'],
            'longitude' => $incident['longitude'],
            'archived' => (boolean) $incident['incidentArchived']
        ];
    }
}

更新2 我通过删除respond包装器尝试了其他方法。一切都很好。但我想使用我编写的响应函数来抽象代码。这似乎是个问题。当我将数据传入函数时，没有返回任何内容。当我转储变量数据时，返回了一个JSON响应。但是respondWithCollection方法返回一个数组。我不明白为什么会这样。这可能是问题吗？

I adapted the method like this:

    public function index()
    {
        $incidents = Incident::all();

        if( ! $incidents) {
            return Response::json([
                'error' => [
                    'message' => 'There are no incidents in the database.',
                    'code' => 100
                ]
            ], 404);
        } else {
            $data = $this->respondWithCollection($incidents, new IncidentTransformer);
            return $this->respond([
                'data' => $data
            ]);
        }
    }

但输出仍为空。所以它必须是具有响应功能的东西。

Answer 1

您将返回Response::json()两次。

$this->respond会返回Response::json，但$this->respondWithCollection()也会返回respondWithArray（）。

尝试类似：

public function index()
{
    $incidents = Incident::all();

    if( ! $incidents) {
        return Response::json([
            'error' => [
                'message' => 'There are no incidents in the database.',
                'code' => 100
            ]
        ], 404);
    } else {
        // getCollection instead of respondWithCollection
        $data = $this->getCollection($incidents, new IncidentTransformer);
        return $this->respond([
            'data' => $data
        ]);
    }
}

-

// getCollection instead of respondWithCollection
protected function getCollection($collection, $callback) {
    $resource = new Collection($collection, $callback);
    $rootScope = $this->fractal->createData($resource);
    // don't respond again
    //return $this->respondWithArray($rootScope->toArray());
    return $rootScope->toArray();
}

Fractal API调用不返回内容

1 个答案: