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Improper Use of ChangeStat?

Asked by
disassembling 48
3 years ago
Edited 3 years ago

I don't understand anymore. I've followed the DataStore tutorial up and down, and now on usage attempt of ChangeStat, I get the following error:

  20:56:15.159  ServerScriptService.DatastoreModule:54: attempt to concatenate string with nil  -  Server  -  DatastoreModule:54

  20:56:15.159  Stack Begin  -  Studio

  20:56:15.159  Script 'ServerScriptService.DatastoreModule', Line 54 - function ChangeStat  -  Studio  -  DatastoreModule:54

  20:56:15.159  Script 'Workspace.Levels.4.SpawnLocation.IncreaseLevel', Line 15  -  Studio  -  IncreaseLevel:15

  20:56:15.159  Stack End  -  Studio

ChangeStat:

function PlayerDataHandler:ChangeStat(player, statName, value)
    local playerUserId = "Player_" .. player.UserId
    assert(typeof(sessionData[playerUserId][statName]) == typeof(value), "ChangeStat error: types do not match")
    if typeof(sessionData[playerUserId][statName]) == "number" then
        sessionData[playerUserId][statName] = sessionData[playerUserId][statName] + value
    else
        sessionData[playerUserId][statName] = value
    end
    player.leaderstats.Level.Value = sessionData[playerUserId]["Level"]
    player.leaderstats.Tokens.Value = sessionData[playerUserId]["Tokens"]
end

Touched ChangeStat call:

local PlayerDataHandler = require(game.ServerScriptService:WaitForChild("DatastoreModule"))

local tokAmt = 1

script.Parent.Touched:Connect(function(hit)
    local player = game.Players:GetPlayerFromCharacter(hit.Parent)
    if player ~= nil then
        local playerLvl = player.leaderstats.Level.Value
        local playerTok = player.leaderstats.Tokens.Value
            if playerLvl == tonumber(script.Parent.Parent.Name) then
                --do noTHINGGGG
                return
            else if playerLvl == ((tonumber(script.Parent.Parent.Name)) - 1) then
                PlayerDataHandler.ChangeStat(player, "Level", (tonumber(script.Parent.Parent.Name) + 1))
                PlayerDataHandler.ChangeStat(player, "Tokens", (player.leaderstats.Tokens.Value + 1))
            end
        end
    end

end)
0
Somewhere in your script you are attempting to combine a string value with a nil value, (ex. "text" .. nil). So it doesnt have anything to do with datastores. Not quite sure where its occuring, since there is code removed. Benbebop 1049 — 3y
0
Printing the player value inside of ChangeStat results in a part name being printed, which isnt accessed anywhere in the actual call of the function. Printing player right before the call of the function prints the correct player object. The attempted concatenation is inside of ChangeStat, (local playerUserId = "Player_"..player.UserId). disassembling 48 — 3y
0
the player parameter being passed through ChangeStat is being interpreted as a Part object inside the ModuleScript somehow. The error is related to datastores because its a code piece pulled directly from the dev wiki. disassembling 48 — 3y

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