attempt to index number with 'SetAsync' when writing to the DataStore - lua

Question

When I try and save a table (encoded into a json format) through SetAsync, it provides me with this error:
"ServerScriptService.InventoryService.main:59: attempt to index number with 'SetAsync' - Server"
I have encoded the table with HTTP:JSONEncode() and I decode it when its read again.
heres an example of the table:
{
["A"] = {
["x"] = 98,
["y"] = "xyz",
["z"] = 15
},
["B"] = {
["c"] = "XYZ",
["d"] = 0, 0, 0,
["e"] = "22",
["f"] = "xyz"
}
}
Here is the Sample code
local Datastore = game:GetService("DataStoreService")
local RunService = game:GetService('RunService')
local HTTP = game:GetService('HttpService')
local item_data = Datastore:GetDataStore("Items")
local function save(Player:Player)
local item_data = {} --contains data created by the user
local savedata = {}
--PLAYER_DATA--
if savedata[Player] == "ERR" then return end
local suc, err = pcall(function()
player_data:SetAsync(Player.UserId, savedata)
end)
if err then
warn("Unable to save data for"..Player.Name,err)
end
--ITEM_DATA--
if item_data[Player] == "ERR" then return end
local suc, err = pcall(function()
local item_json = HTTP:JSONEncode(item_data)
itemdata:SetAsync(Player.UserId,item_json)
end)
if err then
warn("Unable to save data for "..Player.Name,err)
end
end
game.Players.PlayerAdded:Connect(function(Player)
local suc, err = pcall(function()
data = player_data:GetAsync(Player.UserId) or "0"
itemdata = HTTP:JSONDecode(item_data:GetAsync(Player.UserId) or "0")
itemdata = HTTP:JSONDecode(itemdata)
end)
if suc then
savedata[Player] = data
else
savedata[Player] = "ERR"
warn("Error fetching "..Player.Name.."'s data.",err)
end
end)
game.Players.PlayerRemoving:Connect(function(Player)
save(Player)
end)
game:BindToClose(function() -- (only needed inside Studio)
print('BindToClose')
if RunService:IsStudio() then -- (only needed inside Studio)
wait(3) -- this will force the "SetAsync" above to complete
end
end)
Thanks in advance, any help is really appreciated!

Answer 1

itemdata = HTTP:JSONDecode(item_data:GetAsync(Player.UserId) or "0")
itemdata = HTTP:JSONDecode(itemdata)
Not sure why you decode it twice here but take a look at or "0". That means itemdata might end up as 0
itemdata:SetAsync(Player.UserId,item_json)
And here you try to call it. That's why it complains about calling a number.
I assume you meant to use item_data, which is a DataStore. Please use more descriptive names here to avoid such confusion :)