fix to not being able to load a map and then switch back to the study setup map

Source/StudyFrameworkPlugin/Private/SFMapFactor.cpp

@@ -19,24 +19,22 @@ void USFMapFactor::FromJson(TSharedPtr<FJsonObject> Json)
 
 	for(FString LevelName : Levels)
 	{
-		//we had issues with maps being loaded once in the editor and then on starting the study this method
-		//was called again in PostLoad() and tried to reload an already loaded map which caused crashes
-		//with the if-clause below we do not load the maps when starting the study, where we don't need the
-		//asset pointer anyways since the study itself only uses the Levels strings directly
-		UWorld* World = GetWorld();
-		if(World && World->WorldType != EWorldType::PIE && World->WorldType != EWorldType::Game)
-		{
-			TSoftObjectPtr<UWorld> LevelObj = StaticLoadObject(UWorld::StaticClass(), nullptr, *LevelName, nullptr, LOAD_Verify | LOAD_Quiet);
-			Maps.Add(LevelObj.Get());
-			
-		}
+		// we need to transform /Path/To/Asset into /Path/To/Asset.Asset;
+		TArray<FString> Parts;
+		LevelName.ParseIntoArray(Parts,TEXT("/"),true);
+		FString LevelNameFull = LevelName + "." + Parts[Parts.Num()-1];
+		
+		FSoftObjectPath LevelPath(LevelNameFull);
+		TSoftObjectPtr<UWorld> LevelObj(LevelPath);
+		LevelObj.ToSoftObjectPath().PostLoadPath(nullptr);
+		Maps.Add(LevelObj);
 	}
 }
 
 #if WITH_EDITOR
 bool USFMapFactor::CanEditChange(const FProperty* InProperty) const
 {
-	//just use this to not allow editing "Levels" directly at all
+	// just use this to not allow editing "Levels" directly at all
 	if (InProperty->GetFName() == "Levels")
 	{
 		return false;
@@ -54,6 +52,8 @@ void USFMapFactor::PostEditChangeProperty(FPropertyChangedEvent& PropertyChanged
 		Levels.Empty();
 		for(TSoftObjectPtr<UWorld> Map : Maps)
 		{
+			// we want to store the name as /Path/To/Asset not as /Path/To/Asset.Asset
+			// this is beneficial for readability and also needed for loading the levels as is now
 			FSoftObjectPath Path = Map.ToSoftObjectPath();
 			FString PathString = Path.GetAssetPathString();
 			int32 DotIndex;