Why does GetAsync return nil? - lua

Question

I have tried to fix this script, but i cannot.
It is the primary script which maintains most server side stuff.
I tried to make an DataStore handler, but it returns nil.
Code:
local rep = game:GetService("ReplicatedStorage")
local DrawingData = game:GetService("DataStoreService"):GetDataStore("DrawingData")
rep.SendToRandom.OnServerEvent:Connect(function(plr,data)
end)
rep.LoadFromDatastore.OnServerInvoke = function(plr,...)
local success,gotten =pcall(DrawingData.SetAsync,DrawingData,...)
if not success then
gotten = {}
warn("Failure with DataStore get, replacing with placeholder.")
end
return gotten
end
rep.SaveToDatastore.OnServerInvoke =function(plr,data:string)
local a = {DrawingData:GetAsync("GM")}
local gotten = tonumber(a[1])
DrawingData:SetAsync(tostring(gotten + 1),data)
DrawingData:SetAsync("GM",tostring(gotten + 1))
return gotten + 1
end
Output:
Failure with DataStore get, replacing with placeholder.
Saving works, and loading should work.
But, loading doesn't.

Answer 1

Looks like you're using SetAsync and GetAsync without actual UserId to store it to, you should save and load the data to a UserId unless the data is meant to be accessed by everyone (which I do NOT recommend).
From what I can tell you are trying to save data for individual players, but you are storing their data or their data I suppose to a singular DataStore, which will only make it more difficult for the game to load once it is prompted to load again.
Here is what I wrote based on what I believe you are trying to accomplish
local rep = game:GetService("ReplicatedStorage")
local DrawingData = game:GetService("DataStoreService"):GetDataStore("DrawingData")
rep.LoadFromDatastore.OnServerInvoke = function(plr,...)
local success, response = pcall(function(...)
return DrawingData:SetAsync(plr.UserId, ...)
end, ...)
if success ~= true or type(response) ~= "table" or table.getn(response) == 0 then
return {}, type(response) == "string" and warn(response)
end
return response
end
rep.SaveToDatastore.OnServerInvoke =function(plr, data)
local success, response = pcall(function()
return DrawingData:GetAsync(plr.UserId)
end)
if success ~= true or type(response) ~= "table" or table.getn(response) == 0 then
response = {}
end
table.insert(response, data)
local success, response
while success ~= true do
success, response = pcall(function()
return DrawingData:SetAsync(plr.UserId, response)
end)
if success ~= true then
warn(response)
end
end
end