"Invalid argument #1 to 'ipairs' (table expected, got nil)

Help and Feedback Scripting Support
#1

Hi

I have this script (credit: @kercig) to create servers, but when I click the create servers button, I get this error:

662c17478172330c75a693b035b18f8e719ab67b
662c17478172330c75a693b035b18f8e719ab67b920×217 88.8 KB

Error line:

local function ServerUpdate(ServerId,UserId,Psid)
	local createnewarr = true
	servers = playerData:GetAsync(playerUserId)

	--[[ line -]] for i,v in ipairs(servers) do
		if v.server == ServerId and v.plr ==  UserId then
			createnewarr = false
		end
	end
	local arr = {server = ServerId,plr = UserId,id = nil}
	if Psid then
		for i,v in ipairs(servers) do
			if v.server == ServerId and v.id == nil then
				v.id = Psid
				createnewarr = false
			end
		end
	end
	if Psid == nil then
		for i,v in ipairs(servers) do
			if v.server == ServerId and v.id then
				createnewarr = false
			end
		end
	end
	if createnewarr == true then
		table.insert(servers,arr)
	end
	local success, err = pcall(function()
		local playerUserId = "#ServersData[pcall1]Data"
		playerData:SetAsync(playerUserId,servers)
	end)
	if not success then
		warn('UFF Hub | A datastore error occured: ' .. err)
	elseif success then
		warn('UFF Hub | Data successfully loaded!')
	end		 


end

Full script:

local servers = {}
local DataStoreService = game:GetService("DataStoreService")
local playerData = DataStoreService:GetDataStore("#ServersData[pcall1]Save")
local runService = game:GetService("RunService")
local playerUserId = "#ServersData[pcall1]Data"

local data = playerData:GetAsync(playerUserId) 
if data then
	servers = data
else
	servers = {}
end

game:BindToClose(function()
	task.wait(10)
end)

local arrayofunions = {}


local TS = game:GetService("TeleportService")
local Players = game:GetService("Players")
local messagingService = game:GetService("MessagingService")
local httpService = game:GetService("HttpService")
local rs = game:GetService("ReplicatedStorage")
local asktoinvite = rs.AskToInvite
local tp = rs.TeleportToServer
local newserver = rs.CreateServer
local PrivateServerId = game.PrivateServerId


local CurServerNumber = 0
local isReserved = PrivateServerId ~= "" and PrivateServerId == 0

local function ServerUpdate(ServerId,UserId,Psid)
	local createnewarr = true
	servers = playerData:GetAsync(playerUserId)

	for i,v in ipairs(servers) do
		if v.server == ServerId and v.plr ==  UserId then
			createnewarr = false
		end
	end
	local arr = {server = ServerId,plr = UserId,id = nil}
	if Psid then
		for i,v in ipairs(servers) do
			if v.server == ServerId and v.id == nil then
				v.id = Psid
				createnewarr = false
			end
		end
	end
	if Psid == nil then
		for i,v in ipairs(servers) do
			if v.server == ServerId and v.id then
				createnewarr = false
			end
		end
	end
	if createnewarr == true then
		table.insert(servers,arr)
	end
	local success, err = pcall(function()
		local playerUserId = "#ServersData[pcall1]Data"
		playerData:SetAsync(playerUserId,servers)
	end)
	if not success then
		warn('UFF Hub | A datastore error occured: ' .. err)
	elseif success then
		warn('UFF Hub | Data successfully loaded!')
	end		 


end
Players.PlayerRemoving:Connect(function(player)
	CurServerNumber -= 1
	for i,v in ipairs(servers) do
		if PrivateServerId == v.id and isReserved then
			local messageData = {}

			messageData["sender"] = v.id
			messageData["message"] = CurServerNumber

			local encoded = httpService:JSONEncode(messageData)
			messagingService:PublishAsync("#ServersData[pcall1]Data", encoded)
		end
	end
end)

Players.PlayerAdded:Connect(function(player)
	for i,v in ipairs(servers) do
		if v.plr == player.UserId and isReserved and v.id == nil then
			ServerUpdate(v.server,v.plr,PrivateServerId)
		end
	end
	CurServerNumber += 1
	for i,v in ipairs(servers) do
		if game.PrivateServerId == v.id and isReserved then
			local messageData = {}

			messageData["sender"] = v.id
			messageData["message"] = CurServerNumber

			local encoded = httpService:JSONEncode(messageData)
			messagingService:PublishAsync("#ServersData[pcall1]Data", encoded)
		end
	end
end)

local function addtolist(PrivateServerId,amount,player)
	coroutine.wrap(function()
		local List = player.PlayerGui:WaitForChild("ScreenGui",10).Frame.List
		local StandartFrame = game:GetService("ReplicatedStorage").Frame:Clone()
		StandartFrame.Parent = List
		local Owner = StandartFrame:FindFirstChild("Owner")

		local Players = StandartFrame:FindFirstChild("Players")
		local data
		for i,v in ipairs(servers) do
			if v.id == PrivateServerId then
				data = v
			end
		end
		if data then

			Players.Text = "Players: "..tostring(amount).." / 50"
			Owner.Text = "Owner: ".. Players:GetNameFromUserIdAsync(data.plr)
		end
	end)()
end
function callbackFunction(serviceData)
	local decodedData = httpService:JSONDecode(serviceData.Data)
	arrayofunions[decodedData.sender] = decodedData.message
	if decodedData.message == 0 then
		arrayofunions[decodedData.sender] = nil	
	end

end
messagingService:SubscribeAsync("#ServersData[pcall1]Data", callbackFunction)

newserver.OnServerEvent:Connect(function(plr)
	local bool = false
	for i,v in ipairs(servers) do
		if PrivateServerId == v.id and v.plr == plr.UserId then
			warn("UFF Hub | You have made a server already!")
			bool = true
			break
		end
		if v.plr == plr.UserId and v.id ~= PrivateServerId then
			TS:SetTeleportGui(rs:WaitForChild("TeleportingGui"))
			TS:TeleportToPrivateServer(9619375620,v.server,{plr})
			bool = true
		end
	end
	if bool == false then
		warn("UFF Hub | Creating server...")

		local code = TS:ReserveServer(9619375620) 
		ServerUpdate(code,plr.UserId)
		TS:SetTeleportGui(rs:WaitForChild("TeleportingGui"))
		TS:TeleportToPrivateServer(9619375620,code,{plr})
	end
end)
coroutine.wrap(function()
	while task.wait(10) do
		for i,v in ipairs(servers) do
			if PrivateServerId == v.id and isReserved then
				local messageData = {}

				messageData["sender"] = v.id
				messageData["message"] = CurServerNumber

				local encoded = httpService:JSONEncode(messageData)
				messagingService:PublishAsync("#ServersData[pcall1]Data", encoded)
			end
		end
	end
end)()
coroutine.wrap(function()
	while task.wait(1) do
		for i,plr in ipairs(Players:GetChildren()) do
			coroutine.wrap(function()
				for i,c in ipairs(plr.PlayerGui:WaitForChild("System",10).Frame.List:GetChildren()) do
					if c:IsA("Frame") then
						c:Destroy()
					end
				end
			end)()
		end
		for i,v in ipairs(servers) do
			if v.id ~= nil and arrayofunions[v.id] then

				for i,j in ipairs(Players:GetChildren()) do
					coroutine.wrap(function()
						addtolist(v.id,arrayofunions[v.id],j)
					end)()
				end
			end
		end
	end
end)()

Any help would be appreciated, thanks!

#2

That error happens whenever the table you want to loop through is nil.

#3

I know, I tried everything to fix it, loading data in the table, but it still is nil

#4

Are you sure this is right? This text will be blurred

#5

Yes, it is right. Should I put the players user id instead?

#6

What data is supposed to be in the datastore?

#7

It is meant to be for my private server system, checks if player already has a vip server

#8

In that case you can check if it’s not nil, only then run the loop.

#9

Try this

local function ServerUpdate(ServerId,UserId,Psid)
	local createnewarr = true
	local data = playerData:GetAsync(playerUserId) 
	if data then
	    servers = data
    else
	    servers = {}
    end

	for i,v in ipairs(servers) do
		if v.server == ServerId and v.plr ==  UserId then
			createnewarr = false
		end
	end
#10

I’m pretty sure this can be reduced to servers = data or {}

#11

Thanks, it works but for some reason it doesn’t show others servers

image
image1902×921 134 KB

#12

Check console to check if everything is ok and send screenshot pls.

#13

Everything is OK in the console, no errors etc

#14

wait Do you have this script in reserved game?
i mean if it is another game then it won’t work because it doesn’t have this script.
If you have this script in another game then it should work

#15

I have the script in reserved game…

#17