Laravel 5.1，Dingo - 嵌套变形金刚

Question

是否有一种优雅的方式来嵌套转换器以供关系使用？我希望构建一个允许集合有条件地包含关系模型的 REST 接口(interface)。到目前为止，我取得了一定的成功，但在涉及到变形金刚时似乎有点失败(我承认我对 Laravel 5.1 和 Dingo 有点陌生)。我希望尽可能保持 DRY 状态，这样如果将来关系或属性发生变化，也很容易进行更改。

例如一个简单的场景，一个用户可能会收到一条或多条消息(user hasMany received messages)我可以在UserTransformer中做如下操作:

<?php

namespace App\Transformers;

use App\Models\User;
use League\Fractal;

class UserTransformer extends Fractal\TransformerAbstract
{
    public function transform(User $user)
    {
        // Transform the basic model
        $returnUser = [
            'id'           => (int) $user->id,
            'email'        => $user->email,
            'role'         => $user->role,
            'status'       => $user->status,
            'links'        => [
                [
                    'rel' => 'self',
                    'uri' => '/users/'.$user->id
                ]
            ]
        ];

        // Transform relationships, but only if they exist and are requested
        if (isset($user->receivedMessages))
        {
            $returnUser['received_messages'] = [];

            foreach ($user->receivedMessages as $msg)
            {
                $returnUser['received_messages'][] = [
                    'id'      => $msg->id,
                    'read'    => $msg->read,
                    'content' => $msg->content
                ];
            }
        }
        return $returnUser;
    }
}

在这种情况下，我想将 MesagesTransformer 嵌套/应用到相关的接收消息以进行输出格式化，以便所有 REST 输出在所有关系中保持一致。这可能吗？谢谢!

Answer 1

我能够在这里找到问题的答案:http://fractal.thephpleague.com/transformers/ .