How can I check if there is a duplicate item within a folder?

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,
#1

Hello, I’ll need for a help. I’m wondering how I can prevent duplicate items within the same folder. I’m currently working on a RNG game… I can’t fix simple issues with my coding block, this the only way i’ll could find help. I tried everything it’s still doesn’t works

Module Script

local module = {}

--[[local function hasItem(folder, itemToFind)
	for _, item in ipairs(folder:GetChildren()) do
		if item.Name == itemToFind then
			return true
		end
	end
	return false
end]]

function module.Aura(character, plr)
	local AurasFolder = game.ServerStorage:WaitForChild('Auras')
	local AurasInventories = character:WaitForChild('AURAS')
	local rolls = plr:FindFirstChild("leaderstats").Aura
	if not AurasFolder then return end
	
	for i, v in pairs(AurasFolder:GetChildren()) do
		if rolls.Value == v.Name then -- check the roll value has a same name as the folder
			local auraClone = v:Clone() -- clone the folder
			auraClone.Parent = AurasInventories -- parented to aurainventories
			
			for i2, v2 in pairs(v:GetChildren()) do
				local root = character:FindFirstChild(v2.Name)
				if root then
					local auraBase = v2:Clone()
					auraBase.Parent = root
					auraBase.CanCollide = false
					auraBase.Massless = true
					
					local weld = Instance.new("Weld", auraBase)
					weld.Part0 = root
					weld.Part1 = auraBase
				end
			end
		end
	end
end

function module.AuraUnequipped(character, plr)
	local AurasInventories = character:WaitForChild('AURAS')
	
	for _, child in pairs(character:GetChildren()) do
		for _, secondChild in pairs(child:GetChildren()) do
			if secondChild.Name == child.Name then
				secondChild:Destroy()
			end
		end
	end
	
	for _, child in pairs(AurasInventories:GetChildren()) do
		if child:IsA("Folder") then
			child:Destroy()
		end
	end
end

return module

Server


local rp = game:GetService("ReplicatedStorage")
local aurasModule = require(game.ReplicatedStorage:WaitForChild("AurasModule"))
local rollevent = rp:WaitForChild('RollEvent')
local unequippedAura = rp:WaitForChild('Unequipped')

local Chances = {
	{"Dice", 1};
	{"Death", 2};
	{"Deceased", 4};
}

game.Players.PlayerAdded:Connect(function(plr)
	local folder = Instance.new("Folder", plr)
	folder.Name = "leaderstats"
	
	local rolls = Instance.new("IntValue", folder)
	rolls.Name = "Rolls"
	rolls.Value = 0
	
	local AuraName = Instance.new("StringValue", folder)
	AuraName.Name = "Aura"
	AuraName.Value = "None"
	
	plr.CharacterAdded:Connect(function(char)
		local AURAChar = Instance.new("Folder", char)
		AURAChar.Name = "AURAS"
	end)
end)

local function Rarity(user)
	local totalValue = 1
	for index, Value in pairs(Chances) do
		if math.random(1, Value[2]) == 1 and Value[2] >= Chances[totalValue][2] then
			totalValue = index 
		end
	end
	user:FindFirstChild("leaderstats").Rolls.Value += 1
	return totalValue
end

rollevent.OnServerInvoke = function(plr)
	local character = plr.Character or plr.CharacterAdded:Wait()
	
	local chances = Chances[Rarity(plr)][1]
	plr:FindFirstChild("leaderstats").Aura.Value = chances
	aurasModule.Aura(character, plr)
	
	return chances
end

unequippedAura.OnServerInvoke = function(plr)
	local character = plr.Character or plr.CharacterAdded:Wait()
	aurasModule.AuraUnequipped(character, plr)
end
#2

I would be honored if you taught me.
:sob::sob::sob:

#3

a simple example how you can check duplicates:

local folder = game.Workspace.urFolder

local function itemExists(name)
    for _, item in pairs(folder:GetChildren()) do
        if item.Name == name then
            return true
        end
    end
    return false 
end

local function Item(name)
    if not itemExists(name) then
        local newItem = Instance.new("Part") -- replace this with your rng auras thing idk
        newItem.Name = name
        newItem.Parent = folder
    else
        print("Item '" .. name .. "' already exists.")
    end
end

Item("UrNameHere")
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