[Bug] Then serialize Uobject instance via FArhive (saveable variables) values of variables of type Struct become default (the ones what are setted in class defaults)

Development Programming & Scripting
1

Other types such int string or class reference are serialized with current values and not default ones. So the problem only exists with blueprint structs.

Here is 2 simple functions to make binarry array of saveabale variables on object and to override variables of object from binary array data.

#pragma once

#include "MemoryWriter.h"
#include "MemoryReader.h"
#include "ObjectAndNameAsStringProxyArchive.h"
#include "Archive.h"
#include "Kismet/BlueprintFunctionLibrary.h"
#include "ObjectToBinaryArrayPlaginBPLibrary.generated.h"

UCLASS()
class UObjectToBinaryArrayPlaginBPLibrary : public UBlueprintFunctionLibrary
{
	GENERATED_UCLASS_BODY()

	//Saves Object's Saveable Variables into binary array
	UFUNCTION(BlueprintCallable, Category = "ObjectToBinaryArray")
	static TArray<uint8> ObjectToBinaryArray(  UObject* O)
	{
		TArray<uint8> ObjectData;
		FMemoryWriter MemoryWriter(ObjectData, true);

		FObjectAndNameAsStringProxyArchive Ar(MemoryWriter, false);
		Ar.ArIsSaveGame = true; //Set achive is savegame
		//Ar.ArNoDelta = true;
		Ar.ArSerializingDefaults = 0;
		
		O->Serialize(Ar);
		
		return ObjectData; 
	};

	// Loads data to objects and overrides it's SavableVariables
	UFUNCTION(BlueprintCallable, Category = "ObjectToBinaryArray")
	static void BinaryArrayToObjectOverride(UObject* O , TArray<uint8> ObjectData)
	{
		FMemoryReader MemoryReader(ObjectData, true);

		FObjectAndNameAsStringProxyArchive Ar(MemoryReader, false);
		Ar.ArIsSaveGame = true; 
		//Ar.ArNoDelta = true;
		Ar.ArSerializingDefaults = 0;

		O->Serialize(Ar);
	};

};

But Struckts are not saved correctly.