This PR was squashed before being merged into the 4.2-dev branch (closes #28661). Discussion ---------- [Serializer] Add an option to skip null values | Q | A | ------------- | --- | Branch? | master | Bug fix? |no | New feature? | yes  | BC breaks? | no  | Deprecations? | no  | Tests pass? | yes  | Fixed tickets | n/a  | License | MIT | Doc PR | todo Adds a new option to not serialize `null` values: ```php $dummy = new class { public $foo; public $bar = 'notNull'; }; $normalizer = new ObjectNormalizer(); $result = $normalizer->normalize($dummy, 'json', ['skip_null_values' => true]); // ['bar' => 'notNull'] ``` This feature is the only missing part to add [JSON Merge Patch](https://tools.ietf.org/html/rfc7386) support in [API Platform](https://api-platform.com). It will also help supporting this RFC in all other projects using the Symfony Serializer. Commits ------- d3c5055 [Serializer] Add an option to skip null values

Uh oh!