Extbase/ObjectManager does not fully support nullable types
This fails (e.g. in a controller):
$this->objectManager->get(MyClass:class, null) if the constructur of
__construct(?MyType $foo) - an exception is thrown:
throw new \InvalidArgumentException('not a correct info array of constructor dependencies was passed!', 1476107941);
Changing the ctor to
__construct(MyType $foo = null) works, but this means something different. The
? means it is nullable but required,
= null means it is nullable but optional. There are common cases where arguments are nullable and required in multi-argument constructors: e.g, where one passes five arguments where only the fifth is optional, but the second is nullable.
PHP allows optional argument declaration in the middle of the arguemnt list, but it is bad practice (and meaningless).
Extbase should support nullable types.
Found on v8, but valid for all others, I assume.
Updated by DANIEL Rémy 4 months ago
Another usecase where nullable is not supported.
protected ?FrontendUser $feUser;
Extbase's validation throw a "1546632293 RuntimeException : Could not get value of property "Site\Site\Domain\Model\Order::feUser", make sure the property is either public or has a getter getFeUser(), a hasser hasFeUser() or an isser isFeUser()."
If I add a default value :
protected ?FrontendUser $feUser = null;
Extbase is happy. It's weird because null is the default value of every unassigned variable, but I have to assign it explicitly.