json 使用 Zend Framework 2 将 Doctrine 2 实体持久集合转换为数组的最佳方法
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Best way to convert Doctrine 2 entity persistent collection to array with Zend Framework 2
提问by ?ukasz
What is best way (easy) to convert Doctrine 2 entity persistent collection to array with Zend Framework 2? I want convert to array and later output it with JsonView. I can write function which use get_object_var but it is a problem when entity has next entity collection.
使用 Zend Framework 2 将 Doctrine 2 实体持久集合转换为数组的最佳方法（简单）是什么？我想转换为数组，然后用 JsonView 输出它。我可以编写使用 get_object_var 的函数，但是当实体具有下一个实体集合时会出现问题。
Regards.
问候。
回答by Aurelijus Rozenas
Not sure about Zend, but in SF2 + Doctrine you can use getValues()method.
不确定 Zend，但在 SF2 + Doctrine 中你可以使用getValues()method。
$asArray = $persistentCollection->getValues();
回答by Guilherme Blanco
I'll decouple the answer in 2 parts, mainly because you haven't clarified enough if you want to solve purely the PersistentCollection or the entire graph serialization.
我将把答案分为 2 部分，主要是因为你没有足够澄清，如果你想纯粹解决 PersistentCollection 或整个图序列化。
1- Assuming you already know how to solve Entity's serialization, the PersistentCollection can be turned into an array of Entities by calling toArray() method.
1- 假设您已经知道如何解决实体的序列化，那么可以通过调用 toArray() 方法将 PersistentCollection 转换为实体数组。
2- Assuming you don't, I suggest you to either use a pre-built library like JMS Serializer. If you want to create your own by hand, use the ClassMetadata instance that can be extracted from EntityManager->getClassMetadata(get_class($someEntity)) and iterating through fieldMappings and associationMappings properties.
2- 假设你没有，我建议你要么使用像JMS Serializer这样的预构建库。如果您想手动创建自己的，请使用 ClassMetadata 实例，该实例可以从 EntityManager->getClassMetadata(get_class($someEntity)) 中提取并遍历 fieldMappings 和 associationMappings 属性。
