How can i make a player have no duplicates of 1 tool

idkyouknowl · May 6, 2023, 9:23pm

hey guys i need to know how to remove duplications of tools in my roblox game i want the player to only have 1 copy of the tool not 2 just 1, how can i do this?

XR2S · May 6, 2023, 9:56pm

When adding a new tool to the player check if the tool already exists.
If it does then don’t add the weapon to their Backpack.
example:

local player = game.Players:FindFirstChild("WhateverPlayer")
local playerBackPack = player.Backpack
local toolName = "theToolsName"

if playerBackPack:FindFirstChild(toolName) == nil then -- if tool doesn't already exist then continue
-- code that adds weapon
end

idkyouknowl · May 6, 2023, 10:22pm

i made this and it didnt work do you know a solution?

game.Players.PlayerAdded:Connect(function(plr)
	local saber1 = "Lightsaber I"
	local saber2 = "Lightsaber II"
	local saber3 = "Lightsaber III"
	local saber4 = "Lightsaber IV"
	local saber5 = "Lightsaber V"
	local saber6 = "LukeSaber"
	local playerBackPack = plr.Backpack

	plr.CharacterAdded:Connect(function(char)

		local hum = char:FindFirstChild("Humanoid")
		hum.HealthChanged:Connect(function()

			if hum.Health <= 0 then
				wait(6)
				if playerBackPack:FindFirstChild(saber1) == nil then -- if tool doesn't already exist then continue
					if plr:WaitForChild("leaderstats")["Weapon N/B"].Value == 1 then
						local saber1 = game.ReplicatedStorage.Sabers["Lightsaber I"]:Clone()
						saber1.Parent = plr:WaitForChild("Backpack")
						end
				end
				if playerBackPack:FindFirstChild(saber2) == nil then -- if tool doesn't already exist then continue
					if plr:WaitForChild("leaderstats")["Weapon N/B"].Value == 2 then
						local saber2 = game.ReplicatedStorage.Sabers["Lightsaber II"]:Clone()
						saber2.Parent = plr:WaitForChild("Backpack")
					end
				end
				if playerBackPack:FindFirstChild(saber3) == nil then -- if tool doesn't already exist then continue
					if plr:WaitForChild("leaderstats")["Weapon N/B"].Value == 1 then
						local saber3 = game.ReplicatedStorage.Sabers["Lightsaber III"]:Clone()
						saber3.Parent = plr:WaitForChild("Backpack")
					end
				end
				if playerBackPack:FindFirstChild(saber4) == nil then -- if tool doesn't already exist then continue
					if plr:WaitForChild("leaderstats")["Weapon N/B"].Value == 1 then
						local saber4 = game.ReplicatedStorage.Sabers["Lightsaber IV"]:Clone()
						saber4.Parent = plr:WaitForChild("Backpack")
					end
				end
				if playerBackPack:FindFirstChild(saber5) == nil then -- if tool doesn't already exist then continue
					if plr:WaitForChild("leaderstats")["Weapon N/B"].Value == 1 then
						local saber5 = game.ReplicatedStorage.Sabers["Lightsaber V"]:Clone()
						saber5.Parent = plr:WaitForChild("Backpack")
					end
				end
				if playerBackPack:FindFirstChild(saber6) == nil then -- if tool doesn't already exist then continue
					if plr:WaitForChild("leaderstats")["Weapon N/B"].Value == 1 then
						local saber6 = game.ReplicatedStorage.Sabers["LukeSaber"]:Clone()
						saber6.Parent = plr:WaitForChild("Backpack")
					end
				end


			end

		end)

	end)

end)

loganj2010 · May 7, 2023, 8:23am

remove all the code from the PlayerAdded function, example below.

game.Players.PlayerAdded:Connect(function(player)
plr = player
end)
local saber1 = "Lightsaber I"
	local saber2 = "Lightsaber II"
	local saber3 = "Lightsaber III"
	local saber4 = "Lightsaber IV"
	local saber5 = "Lightsaber V"
	local saber6 = "LukeSaber"
	local playerBackPack = plr.Backpack

	plr.CharacterAdded:Connect(function(char)

		local hum = char:FindFirstChild("Humanoid")
		hum.HealthChanged:Connect(function()

			if hum.Health <= 0 then
				wait(6)
				if playerBackPack:FindFirstChild(saber1) == nil then -- if tool doesn't already exist then continue
					if plr:WaitForChild("leaderstats")["Weapon N/B"].Value == 1 then
						local saber1 = game.ReplicatedStorage.Sabers["Lightsaber I"]:Clone()
						saber1.Parent = plr:WaitForChild("Backpack")
						end
				end
				if playerBackPack:FindFirstChild(saber2) == nil then -- if tool doesn't already exist then continue
					if plr:WaitForChild("leaderstats")["Weapon N/B"].Value == 2 then
						local saber2 = game.ReplicatedStorage.Sabers["Lightsaber II"]:Clone()
						saber2.Parent = plr:WaitForChild("Backpack")
					end
				end
				if playerBackPack:FindFirstChild(saber3) == nil then -- if tool doesn't already exist then continue
					if plr:WaitForChild("leaderstats")["Weapon N/B"].Value == 1 then
						local saber3 = game.ReplicatedStorage.Sabers["Lightsaber III"]:Clone()
						saber3.Parent = plr:WaitForChild("Backpack")
					end
				end
				if playerBackPack:FindFirstChild(saber4) == nil then -- if tool doesn't already exist then continue
					if plr:WaitForChild("leaderstats")["Weapon N/B"].Value == 1 then
						local saber4 = game.ReplicatedStorage.Sabers["Lightsaber IV"]:Clone()
						saber4.Parent = plr:WaitForChild("Backpack")
					end
				end
				if playerBackPack:FindFirstChild(saber5) == nil then -- if tool doesn't already exist then continue
					if plr:WaitForChild("leaderstats")["Weapon N/B"].Value == 1 then
						local saber5 = game.ReplicatedStorage.Sabers["Lightsaber V"]:Clone()
						saber5.Parent = plr:WaitForChild("Backpack")
					end
				end
				if playerBackPack:FindFirstChild(saber6) == nil then -- if tool doesn't already exist then continue
					if plr:WaitForChild("leaderstats")["Weapon N/B"].Value == 1 then
						local saber6 = game.ReplicatedStorage.Sabers["LukeSaber"]:Clone()
						saber6.Parent = plr:WaitForChild("Backpack")
					end
				end


			end

this should work

idkyouknowl · May 7, 2023, 9:53am

i tried it and it didnt work correctly this is what happend:

robloxapp-20230507-1152415.wmv (2.9 MB)

XR2S · May 30, 2023, 8:57pm

Sorry for replying extremely late, but I edited your code a bit. The problem seems to come from you reusing the same variables for the saber name and the actual saber clone. This code should hopefully work.

game.Players.PlayerAdded:Connect(function(plr)
	local saber1 = "Lightsaber I"
	local saber2 = "Lightsaber II"
	local saber3 = "Lightsaber III"
	local saber4 = "Lightsaber IV"
	local saber5 = "Lightsaber V"
	local saber6 = "LukeSaber"
	local playerBackPack = plr.Backpack

	plr.CharacterAdded:Connect(function(char)
		wait(6)
		if playerBackPack:FindFirstChild(saber1) == nil then -- if tool doesn't already exist then continue
			if plr:WaitForChild("leaderstats")["Weapon N/B"].Value == 1 then
				local saber1Clone = game.ReplicatedStorage.Sabers[saber1]:Clone()
				saber1Clone.Parent = playerBackPack
			end
		end
		if playerBackPack:FindFirstChild(saber2) == nil then -- if tool doesn't already exist then continue
			if plr:WaitForChild("leaderstats")["Weapon N/B"].Value == 2 then
				local saber2Clone = game.ReplicatedStorage.Sabers[saber2]:Clone()
				saber2Clone.Parent = playerBackPack
			end
		end
		if playerBackPack:FindFirstChild(saber3) == nil then -- if tool doesn't already exist then continue
			if plr:WaitForChild("leaderstats")["Weapon N/B"].Value == 1 then
				local saber3Clone = game.ReplicatedStorage.Sabers[saber3]:Clone()
				saber3Clone.Parent = playerBackPack
			end
		end
		if playerBackPack:FindFirstChild(saber4) == nil then -- if tool doesn't already exist then continue
			if plr:WaitForChild("leaderstats")["Weapon N/B"].Value == 1 then
				local saber4Clone = game.ReplicatedStorage.Sabers[saber4]:Clone()
				saber4Clone.Parent = playerBackPack
			end
		end
		if playerBackPack:FindFirstChild(saber5) == nil then -- if tool doesn't already exist then continue
			if plr:WaitForChild("leaderstats")["Weapon N/B"].Value == 1 then
				local saber5Clone = game.ReplicatedStorage.Sabers[saber5]:Clone()
				saber5Clone.Parent = playerBackPack
			end
		end
		if playerBackPack:FindFirstChild(saber6) == nil then -- if tool doesn't already exist then continue
			if plr:WaitForChild("leaderstats")["Weapon N/B"].Value == 1 then
				local saber6Clone = game.ReplicatedStorage.Sabers[saber6]:Clone()
				saber6Clone.Parent = playerBackPack
			end
		end

	end)

end)

idkyouknowl · June 2, 2023, 6:05pm

sadly this doesnt work either… i dont know what is going on but it looks like it should work

FastAsLightning101 · June 2, 2023, 7:58pm

maybe try something like


if backpack:FindFirstChild(tool) then return end

toolclone = game.replicatedstorage.tool:clone()
toolclone.parent = backpack

im not sure though maybe i can help i have nothing to do
the other codes do seem like they should be working

weakroblox35 · June 2, 2023, 8:15pm

Put backpack under CharacterAdded connection.

idkyouknowl · June 2, 2023, 9:19pm

i am not sure what you mean by this, do you have an example?

idkyouknowl · June 2, 2023, 9:35pm

do you have an example? like i dont know what i am suppose to do with this

FastAsLightning101 · June 2, 2023, 10:30pm

so like for your code it would look like this i think?

	if playerBackPack:FindFirstChild(saber1) then return end
			if plr:WaitForChild("leaderstats")["Weapon N/B"].Value == 1 then
				local saber1Clone = game.ReplicatedStorage.Sabers[saber1]:Clone()
				saber1Clone.Parent = playerBackPack
			end
		end

idk if this will work but i guess it could be worth a shot if ur still struggling. I did something like this and it works for me.

weakroblox35 · June 2, 2023, 10:57pm

Just define backpack on characteradded since it refreshes everytime player respawns

idkyouknowl · June 2, 2023, 11:06pm

i will check if this works tmr morning, ty for your time!

SwiftTheReal · June 3, 2023, 12:05am

Hello, you can try this:


game.PlayersAdded:Connect(function(Player : Player)

local Backpack = Player.Backpack
local CurrentItemsTable = {}

local function UpdateBackpackItems(Child)
if not CurrentItemsTable[Child.Name] then CurrentItemsTable[Child.Name] = 1 

Child.Destroyed:Connect(function()
if CurrentItemsTable[Child.Name] then

CurrentItemsTable[Child.Name] = nil
 end

end)

else Child:Destroy() end
end)



Backpack.ChildAdded:Connect(UpdateBackpackItems)

—Listener when Player character
loads

Player.CharacterAdded:Connect(function(c)
table.clear(CurrentItemsTable)
end)

end)

idkyouknowl · June 3, 2023, 10:54am

this looks good but i dont know how i could edit this cuz i never script like this

idkyouknowl · June 3, 2023, 2:11pm

could you tell me how i can easily change this?

SwiftTheReal · June 3, 2023, 3:10pm

You don’t have to change many things as it manually
saves a tool into a table and checks everytime the player gets added a new tool in his backpack

idkyouknowl · June 3, 2023, 3:12pm

fr? ok let me check it out with the old script

idkyouknowl · June 3, 2023, 3:20pm

i have noticed that the issue isnt with the player spawning it gives the player tools like 2/3 seconds after the player spawned, do you know how to fix that?