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Getting a variable from FAssetData in UObjectLibrary

I want to get a variable from my objects in UObjectLibrary. The variable is defined in c++ in the AObject class, only the cast to this class returns null. The object in the library that i use for testing is a blueprint with as parentclass AObject. I hope someone has a solution.

 UClass* cls = TSubclassOf<class AObject>();
     auto ObjectLibrary = UObjectLibrary::CreateLibrary(cls, false, true);
     ObjectLibrary->LoadAssetDataFromPath(FString(TEXT("/Game/Objects")));
 
     TArray<FAssetData> AssetDatas;
     ObjectLibrary->GetAssetDataList(AssetDatas);
     UE_LOG(LogTemp, Warning, TEXT("Found objects: %d"), AssetDatas.Num());
 
     AObject* object = Cast<AObject>(AssetDatas[0].GetAsset()); //Always returns null
 
     UE_LOG(LogTemp, Warning, TEXT("Variable: %i", object->variable));
Product Version: UE 4.16
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asked Jul 12 '17 at 03:23 PM in C++ Programming

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sjoerdcr
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You have to load the asset into memory before you can access it.

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answered Jul 12 '17 at 04:35 PM

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MatzeOGH
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avatar image MatzeOGH Jul 12 '17 at 04:51 PM

AssetDatas[0].ToStringReference().TryLoad()

returnes the UObject if it can

avatar image sjoerdcr Jul 12 '17 at 09:52 PM

Thank you for the reply, but I still have a problem with casting. The objectInMemory is not null, but the object still is.

 UObject* objectInMemory = AssetDatas[0].ToStringReference().TryLoad();
 AObject* object = Cast<AObject>(objectInMemory);
avatar image MatzeOGH Jul 12 '17 at 11:02 PM

Are you certain that the first asset data object is of class AObject?

avatar image sjoerdcr Jul 13 '17 at 08:39 AM

Yes, I found out that i can access the variable if i spawn the object with:

 SpawnActor<AObject>

But i think it is not very efficient

avatar image MatzeOGH Jul 13 '17 at 09:44 AM

If it is a class that you want to spawn you can do something like: getClass()->GetDefaultObject()

That way you get the CDO of the class. Doesn't work with pure assets though.

avatar image sjoerdcr Jul 13 '17 at 09:58 AM

This works, thank you!

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