Symfony2 Doctrine2反序列化和合并实体问题 [英] Symfony2 Doctrine2 De-Serialize and Merge Entity issue
问题描述
我正在尝试将json反序列化为一个Entity，然后合并该Entity.
I am trying to de-serialize json into an Entity and then Merge the Entity.
我相信我过去曾在这里工作过，我会发送ID和我想更新的任何字段.例如:
I believe I had this working in the past where I would send the ID and any fields I wished to update. For example:
在我的数据库中:
| id | first | last | city |
| 1 | Jimmy | James | Seattle |
然后我将反序列化以下json并合并实体
I would then de-serialize the following json and merge the entity
$json = { "id" : 1, "city": "chicago"}
$customer = $serializer->deserialize($json, 'App\CustomerBundle\Entity\Customer', 'json');
$em->merge($customer);
预期结果将是:
| id | first | last | city |
| 1 | Jimmy | James | Chicago |
但是我得到以下信息:
| id | first | last | city |
| 1 | null | null | Chicago |
就像我说过的那样，我相信我在某个时候可以进行此工作，我不确定这是否与jms_serializer或em->merge有关.
Like I said I believe I had this working at some point, I am unsure if this is related to the jms_serializer or em->merge.
$customer->getFirst()在合并实体之前和之后返回null
$customer->getFirst() returns null Before and After the entity is Merged
推荐答案
反序列化器将JSON字符串转换为对象，仅此而已.它将使用您序列化的属性.如果未设置属性，则该属性将保留为空(或类中指定的默认值).
The deserializer transforms your JSON string into an object, nothing more. It will use the properties you serialized. If a property is not set, it will remain null (or the default value specified in your class).
merge方法还将空属性保留到数据库中.
The merge method will also persist null properties to database.
To avoid that, look at the answer from : how to update symfony2/doctrine entity from a @Groups inclusion policy JMSSerializer deserialized entity
在保留实体之后，在实体上调用EntityManager :: refresh()方法应加载缺少的属性.
After you have persisted your entity, calling EntityManager::refresh() method on your entity should load missing properties.
也相关:
- How to update a Doctrine Entity from a serialized JSON?
- How to manage deserialized entities with entity manager?
- Doctrine2 ORM Ignore relations in Merge
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