DataStore Problem

Help and Feedback Scripting Support
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#1
  1. What do you want to achieve? Keep it simple and clear!
    I am trying to make a saving stage system for my obby.
  2. What is the issue? Include screenshots / videos if possible!
    I am receiving this error:
    image
    image845×77 3.72 KB
  3. What solutions have you tried so far? Did you look for solutions on the Developer Hub?
    I looked on the DevHub but it didn’t show how to fix my problem.

Here is my code:

local ds = game:GetService("DataStoreService")
local data = ds:GetDataStore("Data")
game.Players.PlayerAdded:Connect(function(plr)
	local leaderstats = Instance.new("Folder",plr)
	leaderstats.Name = "leaderstats"
	local stage = Instance.new("NumberValue",leaderstats)
	stage.Name = "Stage"
	local plrdata = data:GetAsync(plr.UserId)
	stage.Value = table.unpack(plrdata,1,1) or 0
end)
game.Players.PlayerAdded:Connect(function(plr)
	local stage = plr:WaitForChild("leaderstats"):WaitForChild("Stage")
	local datatosave = {}
	table.insert(datatosave,1,stage.Value)
	data:SetAsync(plr.UserId, datatosave)
end)
#2

It means plrdata is nil.

You should check first if plrdata is nil. If it is nil, don’t unpack; otherwise, unpack it.

1 Like
#3

@Quwanterz is right, I also wanted to add something on it which is important. You must use pcall() when using GetAsync() and SetAsync(). They can sometimes fail and pcall handles them.

#4

Use pcalls to handle fetching of data and saving of data:

local ds = game:GetService("DataStoreService")
local data = ds:GetDataStore("Data")
game.Players.PlayerAdded:Connect(function(plr)
	local leaderstats = Instance.new("Folder",plr)
	leaderstats.Name = "leaderstats"
	local stage = Instance.new("NumberValue",leaderstats)
	stage.Name = "Stage"
        
    local success, plrdata = pcall(function()
	    return data:GetAsync(plr.UserId)
    end)

    if plrdata then
	   stage.Value = table.unpack(plrdata,1,1)
    else
       stage.Value = 0
    end
end)
game.Players.PlayerAdded:Connect(function(plr)
	local stage = plr:WaitForChild("leaderstats"):WaitForChild("Stage")
	local datatosave = {}
	table.insert(datatosave,1,stage.Value)
    local success, err = pcall(function()
	    data:SetAsync(plr.UserId, datatosave)
    end)
    if not success then print(err) else print("Data saved!") end
end)
#5

I just figured out that I used PlayerAdded instead of PlayerRemoving when I was trying to save the data, lol. Such a simple mistake. Anyways, thanks for all your help guys! I’ll be sure to utilise pcalls now!