不转换为 json 的目录列表,而是我得到一个空对象数组



我有以下代码:

public function adminListAction(Request $request)
{
    if (!$this->isGranted('ROLE_ADMIN')) {
        return new JsonResponse("Not granted");
    }
    $page = $request->query->get('page', 1);
    $criteria = new DocumentaryCriteria();
    $criteria->setStatus(DocumentaryStatus::PUBLISH);
    $criteria->setSort([
        DocumentaryOrderBy::CREATED_AT => Order::DESC
    ]);
    $qb = $this->documentaryService->getDocumentariesByCriteriaQueryBuilder($criteria);
    $adapter = new DoctrineORMAdapter($qb, false);
    $pagerfanta = new Pagerfanta($adapter);
    $pagerfanta->setMaxPerPage(12);
    $pagerfanta->setCurrentPage($page);
    $items = (array) $pagerfanta->getCurrentPageResults();
    $data = [
        'items'             => $items,
        'count_results'     => $pagerfanta->getNbResults(),
        'current_page'      => $pagerfanta->getCurrentPage(),
        'number_of_pages'   => $pagerfanta->getNbPages(),
        'next'              => ($pagerfanta->hasNextPage()) ? $pagerfanta->getNextPage() : null,
        'prev'              => ($pagerfanta->hasPreviousPage()) ? $pagerfanta->getPreviousPage() : null,
        'paginate'          => $pagerfanta->haveToPaginate(),
    ];
    return new JsonResponse($data);
}

返回以下内容,请注意空对象的数组

{ "项目":[ {}, {}, {}, {}, {}, {}, {}, {}, {} ], "count_results": 9, "current_page": 1, "number_of_pages": 1, "下一个":空, "上一页":空, "分页":假 }

我知道通过这样做他们的属性不是空的:

foreach ($items as $item) {
    echo $item->getTitle();
}

返回"纪录片 1">

问题很可能是您的$item对象不可 json 序列化。

尝试在该类(https://www.php.net/manual/en/class.jsonserializable.php(中实现JsonSerializable接口,并向item类添加一个方法,如下所示:

public function jsonSerialize() {
    return [
        'title' => $this->getTitle(),
         'foo' => $this->bar(),
     ];
 }

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