UCLASS/UPROPERTY Configuration Not Reading

Development Programming & Scripting C++
1

Hello UE4 forum,
I’ve been trying to get UCLASS/UPROPERTY configurations working for a bit and sadly have not gotten anywhere with it.

I have a class with UCLASS(Config = Game).
I have a declared variables as follows in the header file inside the class:
UPROPERTY(Config)
FString ConfigLoadName
and in DefaultGame.ini I have the property listed as such:
[/Script/ProjectName.ClassName]
ConfigLoadName=Default

Yet when I try to read this variable in the constructor it isn’t read from the config file. This is following all the info I could find in the documentation and online about it. Wondering what I’m missing here?

2

You need to handle the saving and loading of the configuration manually in the code.

The way I do it is I set up two standalone functions apart from the configuration class in the same file as the class. Replace “UGameConfig” with your class name. In the header, put:

UGameConfig* LoadGameConfig();
void SaveGameConfig(UGameConfig* GameConfig);

and in the implementation file, put:

UGameConfig* LoadGameConfig() {
        UGameConfig* Config = NewObject<UGameConfig>(GetTransientPackage(), UGameConfig::StaticClass());
        Config->LoadConfig(Config->GetClass(), *GetGameConfigFilename());

        return Config;
}

void SaveGameConfig(UGameConfig* GameConfig) {
        GameConfig->SaveConfig(CPF_Config, *GetGameConfigFilename());
}

Hope this helps!

3

Thank you for the reply, that makes sense. Unfortunately though it’s still not reading the configuration file - would this be a correct way to load the DefaultGame.ini config? LoadConfig(GetClass(), TEXT("/Config/DefaultGame.ini"));

4

Sorry, I forgot this part:

.h

FString GetGameConfigFilename();

.cpp

FString GetGameConfigFilename() {
        return FPaths::Combine(*FPaths::ProjectSavedDir(), TEXT("Config"), TEXT("GameSettings.ini"));
}

Why do you need to piggyback off of DefaultGame.ini? My setup will use a new custom config file located at Saved/Config/GameSettings.ini.

5

I’m trying to get it to load a config file at all, and figured the DefaultGame.ini would be the easiest and most straightforward to access since it’s used as an example with the UCLASS/UPROPERTY configuration documentation.

Apologies, but I’m not really understanding why we need to get a pointer to load the configuration file? Couldn’t I run LoadConfig(GetClass(), *GetGameConfigFilename()) straight in the constructor?

6

It probably works, I’ve just never tried it. I’m just sharing what I know. :crazy_face:

7

Ok, got it to read using the following:
LoadConfig(GetClass(),*FPaths::Combine(*FPaths::ProjectSavedDir(), TEXT("Config"), TEXT("GameSettings.ini")));

And had to create Saved/Config./GameSettings.ini to match the filepath, adding the configuration stuff there.

Ty for the help :slight_smile:

8

BTW I use the GetGameConfigFilename function just so I don’t need to change it in multiple places (saving, loading, etc.).