Back Office Title should contain the empty_data option

[srascar]

The declaration of the backofficeTitle field should include the empty_data option. If not, this conflicts with the entity type declaration.

ex:

$formMapper->add('backofficeTitle', TextType::class, [
    'empty_data' => ''
]);

 Expected

• On form submit, when an empty string is sent, the property should be mapped

Actual

Expected argument of type "string", "null" given at property path "backofficeTitle".

https://github.com/sonata-project/SonataArticleBundle/blob/bfcb250f097b9f4a3971a9a23bb04ba6fe6fdb65/src/FragmentService/AbstractFragmentService.php#L49

[VincentLanglet]

Shouldn't the field be required ?

[srascar]

The field is required but this check is made by validators. That means the entity property is set before and that raises an exception in the property accessor

[VincentLanglet]

Do you mind making the PR ?

[srascar]

https://github.com/sonata-project/SonataArticleBundle/pull/284