Attempt to Index nil with

Help and Feedback Scripting Support
#1

Hello, i try to use UpdateAsync, but get this error:

ServerScriptService.DataStore:66: attempt to index nil with 'A'

this is the script in cuestion:

players.PlayerRemoving:Connect(function (player)
	local FolderData = player.FolderData
	datastoreservice:UpdateAsync(player.UserId, function(oldata)
		local newdata = {}
		local SUCCES, ERROR = pcall(function()
			for Data, Value in oldata do
				if type(Value) == "table" then
					for Index, Val in Value do
						newdata[Data][Index] = FolderData[Data][Index].Value
					end
				else
					newdata[Data] = FolderData[Data].Value
				end
			end
		end)
		if SUCCES then
			print("xd")
			return newdata
		else
			print(ERROR)
			return oldata
		end
	end)
end)

and the DataStore like this:

local NEWDATA = {
	["TrabajoActual"] = "aea",
	["Level"] = 0,
	["CarLicences"] = {
		["A"] = false,
		["B"] = false,
		["C"] = false,
		["E"] = false
	}
	
}

and FolderData:

error

other times appear: ServerScriptService.DataStore:66: attempt to index nil with 'TrabajoActual'
and other times doesnt appear nothing

i tried clone player folder in serverstorage and concatenate name with FolderData … player.Name and after complete the update, destroy the folder but i get the same error

i belive that problem is here: FolderData[Data][Index].Value
but i dont know why

apologies for bad english

#2

This most probably happens because when indexing the FolderData, the instance isn’t actually created. Can you try debugging print(FolderData:GetChildren()) before you apply the value?

#3

i get this using GetDescendants:

  19:42:40.763  TrabajoActual  -  Servidor - DataStore:61
  19:42:40.763  CarLicences  -  Servidor - DataStore:61
  19:42:40.763  A  -  Servidor - DataStore:61
  19:42:40.763  B  -  Servidor - DataStore:61
  19:42:40.763  C  -  Servidor - DataStore:61
  19:42:40.763  E  -  Servidor - DataStore:61
  19:42:40.764  Level  -  Servidor - DataStore:61
#4

Well it shouldn’t have any problems then. On which line is your code erroring?

#5

My bad, I think I found the problem.

You’re creating the newData table and looping over it. If the value is a table you loop over it again and apply to newdata[Data][Index]. However, the newdata[Data] is nil. Before you apply the main one, you have to do

newdata[Data] = {}

…to actually make it a table where you can define indexes

#6

I has another question, in the second for loop, the Data will not put in newdata table? because in the first loop take Data index for the second loop

#7 
			for Data, Value in oldata do -- You loop through the main table
				if type(Value) == "table" then -- if the value's type is `table` then
					for Index, Val in Value do -- loop through the `value`
						newdata[Data] = {} -- have to define a table for the `Data` index or else it will stay `nil` which is why you're getting the error
						newdata[Data][Index] = FolderData[Data][Index].Value -- THEN, we apply the `Index` index to the `Data` index
					end
				else -- if the type isn't a table, you don't need to make a table, just apply the value
					newdata[Data] = FolderData[Data].Value
				end
			end
#8

thanks you very much :partying_face:

#9

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