[TYPO3-mvc] Passing LazyLoadingProxy to DomainService

[Thomas "Thasmo" Deinhamer]

Hello folks!

Normally when returning lazy loaded objects from within models
I don't load the real instance inside the getter method. I guess
for templates, Fluid is capable of loading the real instance of
lazy loaded objects.

But if I pass a returned lazy loading proxy object from a getter
to one of my domain services, it expects a concrete model object,
not a lazy loading proxy:

Method:
getPrice(Tx_HypeStore_Domain_Model_Product $product, $quantity = 1){}

Call:
$product = $category->getOneProduct(); // fictive method here, returns 
lazy loading proxy object
$this->service->getPrice($product, 1);

Now the error is:
Argument 1 passed to 
Tx_HypeStore_Domain_Service_ProductService::getPrice() must be an 
instance of Tx_HypeStore_Domain_Model_Product, instance of 
Tx_Extbase_Persistence_LazyLoadingProxy given...

Is the only proper solution to load the real instance inside the
getter method of the parent object or is there any better solution?

Thanks a lot,
Thomas