What happened to yml support?

[maiermic]

I used this library in the past (version 1.X) to serialize YML. However, running

$context = new SerializationContext();
$context->setSerializeNull(true);
$serializer = SerializerBuilder::create()->build();
return $serializer->serialize($data, 'yml', $context);

with the latest version 3.18.2 results in

Uncaught JMS\Serializer\Exception\UnsupportedFormatException: The format "yml" is not supported for serialization.

According to packagist the format is still supported:

Library for (de-)serializing data of any complexity; supports XML, JSON, and YAML.

However, the Github README.md does not mention YAML support

Currently, it supports XML and JSON.

Is the description on packagist out of date? Is YAML not supported anymore? I haven't seen a note about a removal in the changelog. It seems to be configurable, but I haven't found any example in the documentation on how to configure it.

---

Thanks for maintaining this library ❤️

[scyzoryck]

Hi @maiermic!

YML support has been removed in 2.0 with all related code. It looks like packagist description is outdated.

Best, scyzoryck.

[maiermic]

Thanks, may I ask, why it has been removed?

[scyzoryck]

Hard to say - it was long time ago. :D May @goetas will add something it the topic, I can guess that the reasons could be:

• no support for deserialisation implemented
• dependency in symfony/yaml library
• not popular format for exchanging data
• super complicated specification for YAML - 63 ways of defining multiline strings