How to connect PlayerStatsManager with Leaderboards (Nil Value Error)? [closed]

Asked by

6 years ago

Edited 6 years ago

I'm new to Lua scripting and DataStorage. I have the PlayerStatsManager Script as Shown (Stored in game.ServerStorage) (I have also seen similar questions to mine with little/no responses)

001-- Setup table that we will return to scripts that require the ModuleScript.
002local PlayerStatManager = {}
003 
004-- Create variable for the DataStore.
005local DataStoreService = game:GetService('DataStoreService')
006local playerData = DataStoreService:GetDataStore('PlayerData')
007 
008-- Create variable to configure how often the game autosaves the player data.
009local AUTOSAVE_INTERVAL = 60
010 
011-- Number of times we can retry accessing a DataStore before we give up and create
012-- an error.
013local DATASTORE_RETRIES = 3
014 
015-- Table to hold all of the player information for the current session.
016local sessionData = {}
017 
018-- Function the other scripts in our game can call to change a player's stats. This
019-- function is stored in the returned table so external scripts can use it.
020function PlayerStatManager:ChangeStat(player, statName, childStat, changeValue)
021    sessionData[player][statName][childStat] = sessionData[player][statName][childStat] + changeValue
022end
023 
024function PlayerStatManager:SetStat(player, statName, childStat, newValue)
025    sessionData[player][statName][childStat] = newValue
026end
027 
028function PlayerStatManager:GetData(player,statName,childStat)
029    return (sessionData[player][statName][childStat])
030end
031 
032-- Function to retry the passed in function several times. If the passed in function
033-- is unable to be run then this function returns false and creates an error.
034local function dataStoreRetry(dataStoreFunction)
035    local tries = 0
036    local success = true
037    local data = nil
038    repeat
039        tries = tries + 1
040        success = pcall(function() data = dataStoreFunction() end)
041        if not success then wait(1) end
042    until tries == DATASTORE_RETRIES or success
043    if not success then
044        error('Could not access DataStore! Warn players that their data might not get saved!')
045    end
046    return success, data
047end
048 
049-- Function to retrieve player's data from the DataStore.
050local function getPlayerData(player)
051    return dataStoreRetry(function()
052        return playerData:GetAsync(player.UserId)
053    end)
054end
055 
056-- Function to save player's data to the DataStore.
057local function savePlayerData(player)
058    if sessionData[player] then
059        return dataStoreRetry(function()
060            return playerData:SetAsync(player.UserId, sessionData[player])
061        end)
062    end
063end
064 
065-- Function to add player to the sessionData table. First check if the player has
066-- data in the DataStore. If so, we'll use that. If not, we'll add the player to
067-- the DataStore.
068local function setupPlayerData(player)
069    local success, data = getPlayerData(player)
070    if not success then
071        -- Could not access DataStore, set session data for player to false.
072        sessionData[player] = false
073    else
074        if not data then
075            print"what lol"
076            -- DataStores are working, but no data for this player
077            sessionData[player] = {}
078            sessionData[player] = {Coins = 10, Escapes = 0, Vip = false}
079            savePlayerData(player)
080        else
081            -- DataStores are working and we got data for this player
082            sessionData[player] = data
083        end
084    end
085end
086 
087-- Function to run in the background to periodically save player's data.
088local function autosave()
089    while wait(AUTOSAVE_INTERVAL) do
090        for player, data in pairs(sessionData) do
091            savePlayerData(player)
092        end
093    end
094end
095 
096-- Bind setupPlayerData to PlayerAdded to call it when player joins.
097game.Players.PlayerAdded:connect(setupPlayerData)
098 
099-- Call savePlayerData on PlayerRemoving to save player data when they leave.
100-- Also delete the player from the sessionData, as the player isn't in-game anymore.
101game.Players.PlayerRemoving:connect(function(player)
102    savePlayerData(player)
103    sessionData[player] = nil
104end)
105 
106-- Start running autosave function in the background.
107spawn(autosave)
108 
109-- Return the PlayerStatManager table to external scripts can access it.
110return PlayerStatManager
 View all 110 lines...

And I'm trying to call that script inside of my leaderboard script, located in game>Workspace>Main>Stats. This is what I have so far, and I'm attempting to reach it by calling Wins.Value = PlayerStatManager:GetData(Player, "Wins", 0)

01PlayerStatManager = require(game.ServerStorage.PlayerStatManager)
02 
03game.Players.PlayerAdded:connect(function(Player)
04 
05    -- Folders
06    local Folder = Instance.new("Folder", Player)
07    Folder.Name = 'leaderstats'
08 
09    local settingFolder = Instance.new("Folder", Player)
10    settingFolder.Name = 'PlayerSettings'
11 
12    -- Player
13    local Playing = Instance.new('BoolValue', Player)
14    Playing.Name = 'Playing'
15    Playing.Value = false
16    local isAFK = Instance.new('BoolValue', Player)
17    isAFK.Name = 'isAFK'
18    isAFK.Value = false
19 
20    -- Leaderboard
21    local Escapes = Instance.new('IntValue', Folder)
22    Wins.Name = 'Wins'
23    Wins.Value = PlayerStatManager:GetData(Player, "Wins", 0)
24    print(Wins.Value)
25 
26    local Coins = Instance.new('IntValue', Folder)
27    Coins.Name = 'Coins'
28    Coins.Value = PlayerStatManager:GetData(Player, "Coins", 10)
29    print(Coins.Value)
30 
31    -- In-game Leaderboard
32    local Kills = Instance.new("IntValue", settingFolder)
33    Kills.Name = "Kills"
34    Kills.Value = 0
35 
36end)
 View all 36 lines...

I'm new to DataStorage, and keep getting nil value errors. The most recent error reads 18:55:55.154 - ServerStorage.PlayerStatManager:29: attempt to index field '?' (a nil value) I've toggled with this script a little and get different errors, but they all result in this sort of error.

I'm just trying to save and store data right now. Can't get passed this error

Closed as Not Constructive by User#19524

This question has been closed because it is not constructive to others or the asker. Most commonly, questions that are requests with no attempt from the asker to solve their problem will fall into this category.

Why was this question closed?