Listening to nested indexes with replicaService?

Help and Feedback Scripting Support
#1

I’m using profileService and replicaService for my player’s data. I am trying to use :ListenToChange() from ReplicatedService. I am getting it to work with values that are one index deep in my table, but I can’t figure out how to use a “deeper” index (ex. I can access [4] but not [4][1]) This is my code for updating data to the client Local Script:

replicaController.ReplicaOfClassCreated("DataToken_"..player.UserId,function(replica)
	print(replica.Data)
	
	replica:ListenToChange({"cash"},function(newVal) 
		standalones.cash.Value = replica.Data["cash"]
	end)
	
	replica:ListenToChange({"exp"},function(newVal)
		standalones.exp.Value = replica.Data["exp"]	
	end)
	
	replica:ListenToChange({"level"},function(newVal) 
		standalones.level.Value = replica.Data["level"]	
	end)
	
	replica:ListenToChange({replica.Data["guns"]["brocc"]["speedBoost"]},function(newVal) 
		standalones.guns.brocc.upgrades.speedBoost.Value = replica.Data["guns"]["brocc"]["speedBoost"]
		print(replica.Data["guns"]["brocc"]["speedBoost"])
	end)
	cashTextLabel.Text = "Cash: "..replica.Data["cash"] .. " ||| Exp: " .. replica.Data["exp"] .. " ||| Brocc's speedBoost: " .. replica.Data["guns"]["brocc"]["speedBoost"]
end)
replicaController.RequestData()

And this is the data profile it’s using Module Script:

local playerProfileStore = profileService.GetProfileStore("playerProfileStore",{
	cash = 0,
	level = 1,
	exp = 1,
	guns = {
		brocc = {
			level = 1,
			strength = 1,
			range = 1,
			fireRate = 1,
			reloadRate = 1,
			growRate = 1,
			speedBoost=1
		},
		pea = {
			level = 1,
			strength = 1,
			range = 1,
			fireRate = 1,
			reloadRate = 1,
			growRate = 1,
			speedBoost=1
		},
		karrot = {
			level = 1,
			strength = 1,
			range = 1,
			fireRate = 1,
			reloadRate = 1,
			growRate = 1,
			speedBoost=1
		},
	}
})

In the first block, the other listeners work because they’re only one index deep, but the last function containing [“guns”][“brocc”][“speedBoost”] path does not. I’m not sure if another function should be used or if there’s a way to pass it.

I also get no errors because the function still runs it just logically is wrong. I’ve checked the docs but it was not able to help me, and I have seen someone ask the question before but only buried in a post and I cannot find it again.

Should I make a separate data store? a new function? is there a way to pass longer paths that I’m missing? Please ask me to elaborate on anything if my explanation doesn’t resonate. Thanks for reading, any tips are appreciated!

#2

I haven’t worked with ReplicaService before, but my replication system looks similar. From what I understand, what I would do is this. It listens for the “guns” value to change, and checks for if the “speedBoost” value changed.

local lastSpeedBoost = replica.Data.guns.brocc.speedBoost

replica:ListenToChange({"guns"}, function(newVal)
	local newSpeedBoost = newVal.guns.brocc.speedBoost
	
	if newSpeedBoost  ~= lastSpeedBoost then
		-- Speed boost value changed, do stuff
		lastSpeedBoost = newSpeedBoost 
	end
end)
1 Like
#3

Good idea but just listening for guns doesn’t work when the deeper value changes. I changed the if statement and put it in the exp listener like this:

replica:ListenToChange({"exp"},function(newVal)
		if replica.Data["guns"]["brocc"]["speedBoost"] ~= gunVals.brocc.upgrades.speedBoost.Value then
			gunVals.brocc.upgrades.speedBoost.Value = replica.Data["speedBoost"]
		end
	end)

and it works, it checks the values everytime exp is updated. So to make this work right would it be a bad idea to add a playTime value and increment it every second and put this if statement check + the roughly 50-80 others in the playTime listener? I know its not the conventional way to track time but it would work to also update this. I could crosscheck with real playtime too when player leaves. That’s my first thought.

#4

That would work if the speedBoost is only changed when exp is updated. But, if the speedBoost changes and the exp doesn’t, you’ll likely need a new un-nested value e.g. “gunsUpdateIteration” to update whenever the speedBoost changes, so it can actually be detected. Hope this helps