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.
为避免这种情况，请查看以下答案:
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
这篇关于Symfony2 Doctrine2反序列化和合并实体问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！