如何在 Symfony Serializer 中反序列化一组对象?

问题描述

是否可以在 Symfony Serializer 中反序列化属性中的对象数组?我有一个带有 $Npc = [] 属性的 Boss 类，它需要保存一个 Npc 对象数组.我确实在文档中看到了一些示例，但它们没有说明此功能.我有一个带有 NPC 数组的 json 字符串，例如:

Is is possible in Symfony Serializer to deserialize an array of objects in a property? I have a Boss class with the $Npc = [] property that needs to hold a array of Npc objects. I did see some examples in the documentation, but they do not state this feature. I have a json string with an array of NPC's For example:

class Boss {

    private $Npc = [];

    /**
    * @return Npc[]
    */
    public function getNpcs(): array
    {
        return $this->npcs;
    }
}

我使用的是 php7.1 和 symfony/serializer 版本 ^3.3.

I am using php7.1 and symfony/serializer version ^3.3.

我已经尝试过 PhpDocExtractor，但它不会让我安装它.:(

I already tried PhpDocExtractor, but it would not let me install it. :(

这是一个可能的 JSON 值:

This is a possible JSON value:

{
    "bossname": "Epic boss!",
    "npcs": [{
        "id": 24723,
        "name": "Selin Fireheart",
        "urlSlug": "selin-fireheart",
        "creatureDisplayId": 22642
    }]
}

推荐答案

我找到了一种方法:).我通过 Composer 安装了 Symfony PropertyAccess 包.使用此包，您可以添加加法器、移除器和哈希器.这样 Symfony Serializer 会自动用正确的对象填充数组.示例:

I found a way to do this :). I installed the Symfony PropertyAccess package through Composer. With this package, you can add adders, removers and hassers. This way Symfony Serializer will automaticly fill the array with the correct objects.Example:

private $npcs = [];

public function addNpc(Npc $npc): void
{
    $this->npcs[] = $npc;
}

public function hasNpcs(): bool
{
    return count($this->npcs) > 0
}

等

通过这种方式，您可以将 ObjectNormalizer 用于:

This way you can use the ObjectNormalizer with:

$normalizer = new ObjectNormalizer(null, null, null, new ReflectionExtractor());

编辑:至少从 v3.4 开始，您还必须创建一个卸妆方法.否则它将无法工作(没有错误或警告).

---

Edit: At least since v3.4 you have to create a remover method as well. Otherwise it just won't work (no error or warning).

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