How to check if datastore value changed?
01 | local dataservice = game:GetService('DataStoreService'):GetDataStore("example") |
02 | game.Players.PlayerAdded:connect(function(player) |
03 |
04 |
05 | ---------------------------------------------------------------- |
06 | local ukey = 'id-'..player.userId |
07 | local titanium = Instance.new('IntValue') --- Store titanium |
08 | local resources = Instance.new('Folder',player) |
09 | resources.Name = 'Resources' |
10 | titanium.Parent = resources |
11 | titanium.Name = 'Titanium' |
12 |
13 |
14 | local GetSaved = dataservice:GetAsync(ukey) |
15 | if GetSaved then |
The script above It's my datastore script obviously... what i'm trying to do is when a player who joined the game titanium value does not equal to 0 a part from lighting will be clone to the player instance folder called "resources". so anyone who joined the game as long as their titanium value does not equal to 0 it will clone the part...
THE PROBLEM
If a player is new to the game and of course the player titanium value is 0 because the player hasn't played yet meaning the the part will not be cloned.. since the player titanium value is 0. Now if the player during the game gathered a titanium using a tool inside the tool i have a script which will add a value to the player titanium
1 | Player.Resources.Titanium.Value = Player.Resources.Titanium.Value +5 |
Like that^, now i want to make it clone the part because the player titanium value is no longer equal to 0 and i want to clone the part only once just like when a player joins the game.
1 answer
You essentially need an "OnChange" event handler (or perhaps a "SetTitanium" method) that will keep track of this for each player. Since you're creating the titanium IntValue right there, it is easy to add an OnChange to it:
01 | if titanium.Value ~= 0 then |
02 | game.ReplicatedStorage.Items.Titanium:Clone().Parent = player:WaitForChild("PlayerStorage") --note that I've changed Lighting to ReplicatedStorage; you should move your stuff there |
03 | player.PlayerStorage.Titanium.Quantity.Value = titanium.Value |
04 | else |
05 | local con --must have this on its own line to reference it in the Changed function |
06 | con = titanium.Changed:connect(function(prop) |
07 | if prop ~= "Value" then return end --This is mainly here because some Roblox properties have multiple names and trigger the Changed event multiple times, but we don't want to SpawnPart more than once. |
08 | if titanium.Value > 0 then |
09 | con:disconnect() --we no longer need to listen to the Changed event |
10 | game.ReplicatedStorage.Items.Titanium:Clone().Parent = player:WaitForChild("PlayerStorage") |
11 | end |
12 | end) |
13 | end |
As you can see, the idea is simply to keep track of the titanium value until it is non-zero. At that point, the player receives the cloned part. (You might want to put that cloning line into its own function to avoid duplication.)
Note: I do not update the PlayerStorage.Titanium.Quantity.Value in the OnChanged event. If you want that auomatically kept up-to-date, you can add it, but would then need to remove the con:disconnect() part.
The note beside the local con is saying that this wouldn't work:
1 | local con = titanium.Changed:connect(function(prop) |
2 | --con will be nil here, so calling con:disconnect() will create an error |
3 | --This is because, when the function is being created, 'con' doesn't exist. Once the function is created and passed to the 'connect' function, *then* 'con' is created. |
4 | end) |