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Trying to work on a Shop GUI and i keep getting an error from my output How did this happen?

Asked by
Kul3dud3123 -5
6 years ago

Im working on a shop GUI and im just one error away from completing it. it keeps saying "attempt to index upvalue 'tool' (a nil value)". How do I fix it? here's my script attempt :

local price = script.Parent.Parent.Price
local tools = game.ReplicatedStorage:WaitForChild("Tools")
local tool = tools:FindFirstChild(script.Parent.Parent.ItemName.Value)
local player = game.Players.LocalPlayer

script.Parent.MouseButton1Click:Connect(function()
    if player.leaderstats:FindFirstChild("Money").Value >= price.Value then
        player.leaderstats:FindFirstChild("Money").Value = player.leaderstats:FindFirstChild("Money").Value - price.Value
        local clone = tool:Clone()
        clone.Parent = player.Backpack
        local clone2 = tool:Clone()
        clone2.Parent = player.StarterGear
    end
end)

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Answered by
AswormeDorijan111 531 Moderation Voter
6 years ago
Edited 6 years ago

The reason why you get the error: Attempt to index upvalue 'tool' (A nil value) is to cause the way to that Tool isn't correct. In this case, I can only short your code and make it easier to understand. I prefer using :WaitForChild() cause it waits for something to be loaded, in your case you should be using it, that may be the reason why the script didn't work. As I see, you used :FindFirstChild() well, you should not be using it cause it searches for the part even before the part is loaded or tool, so you should be using :WaitForChild().

local ToolPrice = script.Parent.Parent:WaitForChild("Price")
local Tools = game.ReplicatedStorage:WaitForChild("Tools")
local ToolName = script.Parent.Parent:WaitForChild("ItemName")
local Tool = Tools:WaitForChild(ToolName.Value)
local Player = game:GetService("Players").LocalPlayer
local leaderstats = Player:WaitForChild("leaderstats")
local CurrencyType = "Money"
local Currency = leaderstats:WaitForChild(CurrencyType)

script.Parent.MouseButton1Click:Connect(function()

    if Currency.Value >= ToolPrice.Value then -- Checks if player has right amount

        Currency.Value = Currency.Value - ToolPrice -- Takes Amount of money after purchased

        local clone = tool:Clone() 
        clone.Parent = player.Backpack
        local clone2 = tool:Clone()
        clone2.Parent = player.StarterGear

    else
        -- code here
    end
end)
0
WaitForChild isn't always the fix. The objects are already there. User#19524 175 — 6y
0
what do you mean "code"? Kul3dud3123 -5 — 6y
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Answered by
MarkusMape 22
6 years ago

Actually why its not working is because its not FE. With latest Roblox update you need to make it FE compatible. And you should use RemoteEvent and RemoteFunctions. If you dont know what is FE, then you should read these pages first.

https://wiki.roblox.com/index.php?title=API:Class/Workspace/FilteringEnabled

https://wiki.roblox.com/index.php?title=API:Class/RemoteEvent

https://wiki.roblox.com/index.php?title=API:Class/RemoteFunction

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