Deserialize JSON into existing Doctrine entities and empty strings are ignored

[knasher]

I'm attempting to deserialize a JSON object into existing Doctrine entities and where a field in the database contains text it is not overwritten when the same field in the JSON is empty.

The only way at present is to fill any empty strings with a single space which will then be shown in the entity by serializer. Does anyone know why this is and if there is a way around it?

[knasher]

There was nothing wrong with JMSSerializer rather a custom PreDeserializationSubscriber that was causing the issue. I will close the issue now.