UEditorAssetLibrary::DoesDirectoryHaveAssets returns false even when folder has assets

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1

Hi everyone,

I’m currently working on an Editor Utility module in Unreal Engine 5.5, and I’m trying to detect whether a specific content folder has assets in it.

I’m using the following API:

UFUNCTION (BlueprintCallable, Category="Editor Scripting | Asset")  
static bool DoesDirectoryHaveAssets  
(  
    const FString & DirectoryPath,  
    bool bRecursive  
)

However, even though the folder I’m checking (e.g. /Game/MyFolder) does contain assets, the function still returns false.

void FSuperManagerModule::OnDeleteEmptyFolderButtonClicked() {
	FixUpRedirectors();
	TArray<FString> FolderPathArray = UEditorAssetLibrary::ListAssets(FolderPaths[0], true, true);
	uint32 Counter = 0;

	FString EmptyFolderPathNames;
	TArray<FString> EmptyFolderPathArray;
	for (const FString& FolderPath : FolderPathArray) {
		if (FolderPath.Contains(TEXT("Developers")) ||
			FolderPath.Contains(TEXT("Collections")) ||
			FolderPath.Contains(TEXT("__ExternalActors__")) ||
			FolderPath.Contains(TEXT("__ExternalObjects__")) 
			) continue;

		if (!UEditorAssetLibrary::DoesDirectoryExist(FolderPath)) continue;
		//DebugHeader::Print(5.f, FColor::Green, FolderPath );
		if (!UEditorAssetLibrary::DoesDirectoryHaveAssets(FolderPath)) {

			EmptyFolderPathNames.Append(FolderPath);
			EmptyFolderPathNames.Append("\n");

			EmptyFolderPathArray.Add(FolderPath);
		}
	}

	if (EmptyFolderPathArray.Num() == 0) {
		DebugHeader::ShowMessageDialog(EAppMsgType::Ok, TEXT("No empty folder found under select folder"), false);
		return;
	}

	EAppReturnType::Type Result =
		DebugHeader::ShowMessageDialog(EAppMsgType::OkCancel, TEXT("Empty folder found in :\n") + EmptyFolderPathNames + TEXT("Would you like to delete them"), false);
	if (Result == EAppReturnType::Cancel) return;

	for (const FString& EmptyFolder : EmptyFolderPathArray) {
		if (UEditorAssetLibrary::DeleteDirectory(EmptyFolder)) {
			++Counter;
		}
		else {
			DebugHeader::PrintLog(TEXT("Failed delete ") + EmptyFolder);
		}
	}
	DebugHeader::ShowMessageDialog(EAppMsgType::Ok, TEXT("Successfully delete") + FString::FromInt(Counter) + TEXT(""), false);
}

Totally same as the course,but.

图片
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图片
图片1204×387 44.2 KB

As you can see, NewFolder/NewFolder1 is not Empty, however the ‘DoesDirectoryHaveAssets’ return false.

I want to know why and how to fix this.