Issues with saving tables to Datastore

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#1

I am creating a game where you can buy, sell, and trade limited items based off of their real prices on the Roblox website. I am currently trying to create a saving system that stores the RAP of the limited you bought so you can see how much the RAP changed since the last time you played and the amount of that limited that you own into a table that should look something like this:

{
[LimitedId] = {amountOwned = 4, lastRAP = 49156}
[LimitedId] = {amountOwned = 2, lastRAP = 42112}
}

The only problem is that when you are buying a limited that you’ve purchased previously instead of updating the already created values in the table it created a new limited ID which is a string and doesn’t update the values of either the int value or the string when you trying buying it once again, someone please help with this as I have been trying to fix this for the last 3 hours.

local player = script.Parent.Parent.Parent.Parent.Parent

local dss = game:GetService("DataStoreService")
local ownedLimitedsDS = dss:GetDataStore("limitedsDS1")

local screen = script.Parent

screen.Purchase.MouseButton1Click:Connect(function()
	local key = player.UserId .. "saveTest10"
	local dataToSave = ownedLimitedsDS:GetAsync(key) or {}
	local limited = screen.currentLimited.Value -- Object value referencing the limiteds folder
	local limitedId = tonumber(limited.Id.Value) -- Converts the limiteds Id from a string to an number
	print(limited)
	
	local function hasValue(tab, limitedId)
		for i, value in ipairs(dataToSave) do
			if value == limitedId then
				return true
			end
		end
	end
	
	if player:WaitForChild("leaderstats"):WaitForChild("Robux").Value >= limited.RAP.Value then
		local ownedLimitedCopies = 0
		local iteminfo = {}
		if hasValue(dataToSave, limitedId) then
			print("Player owns 1+ copies of this limited")
			dataToSave[limitedId].amountOwned = dataToSave[limitedId].amountOwned + 1
			dataToSave[limitedId].lastRAP = limited.RAP.Value
		else
			print("Player has never purchased this limited before")
			iteminfo = {
				amountOwned = 1,
				lastRAP = limited.RAP.Value}
			table.insert(dataToSave, limitedId, iteminfo)
		end
		print(dataToSave)
		local success, response = pcall(ownedLimitedsDS.SetAsync, ownedLimitedsDS, key, dataToSave)
		if success then
			print("Successfully saved owned limiteds for " .. player.Name)
		else
			print("Failed to save owned limiteds for " .. player.Name .. "(" .. response .. ")")
		end
	else -- Player cannot afford limited
		print("Cannot afford limited")
	end
end)

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#2

Why not check if the user has data then just Update instead of Set?

#3

This doesn’t change anything, the same issue still occurs.

#4

The output is saying it can’t find the item so that function is probably not checking for it correctly. Try using pairs to find the key instead of ipairs:

	local function hasValue(tab, limitedId)
		for key, value in pairs(tab) do
			if tonumber(key) == tonumber(limitedId) then
				return true
			end
		end
	end