[VariationBundle] Require driver node definition

[adamelso]

Q	A
Bug fix?	yes
New feature?	no
BC breaks?	no
Deprecations?	no
Fixed tickets	#2348
License	MIT
Doc PR	n/a

As reported in the Fix Ticket, the following code in SyliusVariationExtension would error when $driver is set to null by default. This PR requires driver to be configured (though, only one value is supported at present).

$choiceTypeClasses = array(
    SyliusResourceBundle::DRIVER_DOCTRINE_ORM => 'Sylius\Bundle\VariationBundle\Form\Type\OptionEntityChoiceType'
);

$optionChoiceFormType = new Definition($choiceTypeClasses[$driver]);

[stloyd]

👍

[pjedrzejewski]

Thanks Adam! 👍