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Why does DataStore:GetAsync return an empty table / nil value every time?

Asked by

appxritixn 2235

5 years ago

First, my code:

01local DATASTORESERVICE = game:GetService("DataStoreService")
02local toolStore = DATASTORESERVICE:GetDataStore("-tools")
03game.Players.PlayerRemoving:Connect(function(player)
04    pcall(function()
05        local tools = {}
06        for _,v in pairs(player.Backpack:GetChildren()) do
07            table.insert(tools,1,v)
08            print("Saving: "..v.Name)
09        end
10        for _,v in pairs(player.Character:GetChildren()) do
11            if v:IsA("Tool") then
12                table.insert(tools,1,v)
13                print("Saving: "..v.Name)
14                break
15            end
16        end
17        local own = {}
18        for i,v in pairs(game.ServerStorage:GetChildren()) do
19            if tools:FindFirstChild(v.Name) then
20                table.insert(own,i,true)
21            else
22                table.insert(own,i,false)
23            end
24        end
25        toolStore:SetAsync("-tools"..player.UserId,own)
26    end)
27end)
28 
29game.Players.PlayerAdded:Connect(function(player)
30    local success,value = pcall(function()
31        local tools = toolStore:GetAsync("-tools"..player.UserId)
32    end)
33    if value ~= nil then
34        local own = value
35        for i,v in pairs(own) do
36            if v == true then
37                local tool = game.ServerStorage:GetChildren()[i]:Clone()
38                tool.Parent = player.Backpack
39            end
40        end
41    end
42end)
 View all 42 lines...

This is all 1 script. I am trying to store which weapons a user leaves the game with, so that when they re-enter the game, they have those same weapons.

Currently, it seems to save just fine. I have tried saving a string, and it ends up returning an empty table when I use GetAsync.

Why does this not work, or what would I need to do to make this work?

If you have any further questions, please ask them. I really need to get this fixed.

It seems that Line 10 is giving you errors as the character is no longer in the game when it runs. What I recommend that you do is remove the pcall and run the code through until you get it to function then add it in afterwords. deth836231 142 — 5y

I am going to change my entire outlook on how I save the tools. Thank you though. appxritixn 2235 — 5y

1 answer

Answered by

tobiO0310 58

5 years ago

As deth836231 said, the character is not in the game anymore.

Instead make it so when people buy/get the item, make a table where it's true that they own the thing:

01local DATASTORESERVICE = game:GetService("DataStoreService")
02local toolStore = DATASTORESERVICE:GetDataStore("-tools")
03 
04-- Change to where ever the remote is
05local gotToolRemote = game.ReplicatedStorage.GotTool
06 
07local TOOL_TABLE = {
08    ["Random tool"] = false; -- etc.
09}
10 
11-- When player buys/get's a tool:
12gotToolRemote.OnServerEvent:Connect(function(player, tool) -- This fires with the 'tool' varible as the tool in the players backpack
13    -- Now we save the tool:
14    local success, value = pcall(function()
15        local toolsOwned = toolStore:GetAsync(player.UserId)
16    end)
17    if value ~= nil then
18        toolsOwned[tool.Name] = true
19        toolStore:SetAsync(player.UserId, toolsOwned)
20    end
21end)
22-- Player added:
23game.Players.PlayerAdded:Connect(function()
24    local success,value = pcall(function()
25        local tools = toolStore:GetAsync("-tools"..player.UserId)
26    end)
27    if value ~= nil then
28        local own = value
29        for i,v in pairs(own) do
30            if v == true then
31                local tool = game.ServerStorage:GetChildren()[i]:Clone()
32                tool.Parent = player.Backpack
33            end
34        end
35    end
36end)
 View all 36 lines...

I honestly don't know why I was doing it this way. Your way makes 100% more sense. Thanks appxritixn 2235 — 5y

Thanks. tobiO0310 58 — 5y

Why does DataStore:GetAsync return an empty table / nil value every time?

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