php - 使用 Fractal、Dingo API、Laravel 5 进行嵌套转换

Question

我正在尝试使用以下代码转换一组票

public function transform(Ticket $ticket) {
    return [
        'id' => $ticket->id,
        'title' => $ticket->title,
        'status' => $this->transformerMessage($ticket->status),
        'interactions' => 
              $this->collection(
                   $ticket->interactions,
                   new InteractionTransformer(),
                   'interactions'
              )
    ];
}

但交互结果始终为空。这是我得到的输出示例：

{
  "data": [
    {
      "id": 1,
      "title": "Earum repudiandae corporis sapiente at odit itaque ratione.",
      "status": "Open",
      "interactions": {}
    },
    {
      "id": 2,
      "title": "Odit impedit vitae quo sit molestiae eius.",
      "status": "Open",
      "interactions": {}
    },
    {
      "id": 3,
      "title": "Fuga cum corrupti ut.",
      "status": "Open",
      "interactions": {}
    }
  ]
}

如果我尝试死亡并转储变量，我会得到一个包含 5 个项目的$ticket->interactions集合（这证明变量不为空）。

我在这里做错了什么？

感谢您的关注。

Answer 1

你的集合调用中的 $this 是指从 TransformerAbstract 继承的转换器，它从资源类型创建一个集合。

尝试在末尾添加 ->getData() 以从 Dingo 资源集合中提取 REAL 集合。

public function transform(Ticket $ticket) {
    return [
        'id' => $ticket->id,
        'title' => $ticket->title,
        'status' => $this->transformerMessage($ticket->status),
        'interactions' => 
              $this->collection(
                   $ticket->interactions,
                   new InteractionTransformer(),
                   'interactions'
              )->getData()
    ];
}

Answer 2

试试这个。引用 dingo 变换的回调：

public function transform(Ticket $ticket) {
    $output = $ticket->interactions;
    $trans = new InteractionTransformer();
    return [
        'id' => $ticket->id,
        'title' => $ticket->title,
        'status' => $this->transformerMessage($ticket->status),
        'interactions' => 
              $ticket->interactions->transform(
                 function($i) use ($trans) {
                    return $trans->transform($i);
                 }
              )
    ];
}