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> Unreal Engine API Reference > Plugins > ConcertSyncCore > FConcertDataStore > FConcertDataStore::FetchOrAdd

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FConcertDataStore::FetchOrAdd

Searches the store for the specified key, if not found, adds a new key/value pair, otherwise, if the stored value type matches the initial value type, fetches the stored value.

Windows

MacOS

Linux

References

Module	ConcertSyncCore
Header	/Engine/Plugins/Developer/Concert/ConcertSync/ConcertSyncCore/Source/ConcertSyncCore/Public/ConcertDataStore.h
Include	#include "ConcertDataStore.h"
Source	/Engine/Plugins/Developer/Concert/ConcertSync/ConcertSyncCore/Source/ConcertSyncCore/Private/ConcertDataStore.cpp

Syntax

FConcertDataStoreResult FetchOrAdd
(
    const FName & Key,
    const FName & TypeName,
    const FConcertSessionSerializedPayload & SerializedValue
)

Remarks

Searches the store for the specified key, if not found, adds a new key/value pair, otherwise, if the stored value type matches the initial value type, fetches the stored value. The store always sets the value version to 1 when the value is added.

Returns

The operation result. The possible result codes are:

EConcertDataStoreResultCode::Added if the key/value was added. The result holds a pointer on the newly added value.
EConcertDataStoreResultCode::Fetched if the key was already taken and type matched. The result holds a pointer on the fetched value.
EConcertDataStoreResultCode::TypeMismatch if the key was already taken but the types did not match. The result holds a null pointer.

Parameters

Parameter	Description
Key	The value name to fetch or add.
TypeName	The value type name as returned by TConcertDataStoreType::GetFName().
SerializedValue	The value to store if the key doesn't already exist.

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