Writing KV to the database on player logout about canary

[luanluciano93]

yes, KVs are saved only in Server Save and Server Shutdown

I think it's right that developers don't worry about "if it possibly crashes then" conditions, but worry about making the server not crash.

[pedrohfk]

I made a simple multishot and single shot system, using KV and actually during the open server at a certain point, it seems that the KV is lost, I don't know what the point is, I know that changing from 0 to 1 or 1 to 0 it simply return the default (in this case I did it to avoid null)

[elsongabriel]

Use our discord to ask questions. it's not a real issue.
but..
you can check your line local completed = player:kv():scoped("quests"):scoped('TEST QUEST'):get("completed") or false
if this is not null, return false, and continue your script.

[Decretis]

I'm not sure you understood what I meant. When a player logs off his Storages are saved to the database (KVs don't), so even if the server crashes after that, the player will not be able to collect the reward again. Take a look at the video I prepared.
@elsongabriel

kvvsstoragequest.mp4

local KVQuest = Action()

function KVQuest.onUse(player, item, fromPosition, target, toPosition, isHotkey)
    local completed = player:kv():scoped("quests"):scoped('TEST QUEST'):get("completed") or false

    if completed then
        player:say("[KVQuest]: Empty", TALKTYPE_MONSTER_SAY)
        return true
    end

    local reward = player:addItem(3365, 1)

    player:say("[KVQuest]: Reward", TALKTYPE_MONSTER_SAY)
    player:kv():scoped("quests"):scoped('TEST QUEST'):set("completed", true)

    return true
end

KVQuest:uid(50005)
KVQuest:register()

local StorageQuest = Action()

function StorageQuest.onUse(player, item, fromPosition, target, toPosition, isHotkey)
    local completed = player:getStorageValue(50006)

    if completed > 0 then
        player:say("[StorageQuest]: Empty", TALKTYPE_MONSTER_SAY)
        return true
    end

    local reward = player:addItem(3555, 1)
    player:say("[StorageQuest]: Reward", TALKTYPE_MONSTER_SAY)
    player:setStorageValue(50006, 1)

    return true
end

StorageQuest:uid(50006)
StorageQuest:register()