104: Cannot Store Dictionary in DataStore

Help and Feedback Scripting Support
#1

I am basically trying to save character stats such as the following

local Stats = {
   		CharName = Player:WaitForChild("CharSettings"):WaitForChild("CharacterName").Value,
   		Cash = Player:WaitForChild("Stats"):WaitForChild("Cash").Value,
   		Bank = Player:WaitForChild("Stats"):WaitForChild("Bank").Value,
   		PlayTime = Player:WaitForChild("Stats"):WaitForChild("PlayTime").Value
   	}

   	playerData:SetAsync("Char1Stats"..Player.UserId, Stats)

When I try to do so, I get the following error

104: Cannot store Dictionary in DataStore

My original concept was to save things like this

playerData:SetAsync("Cash"..Player.UserId, Player.Stats.Cash.Value)
playerData:SetAsync("Bank"..Player.UserId, Player.Stats.Bank.Value)
playerData:SetAsync("Playtime"..Player.UserId, Player.Stats.PlayTime.Value)

But I figured this would cause lag and use up the limits on saving in the datastore. However I’ve been running into error 104. What could I do to fix this?

#2

Can you try looping through all of the stats and check if any of them are nil?

a person had this issue not long ago and the cause was a nil value

if you dont want to loop through it you can also turn the dictionary into a json and save the json,
then when you load turn the json into a dictionary again and use that as the data

#3

none of the int values are nil, they are all correct. It just gives an error when trying to save all the data at once using the table

#4

If thats the case then i would recommend turning the dictionary into a json, saving the json string then turning it back when you need to load

use HttpService for this, JSONEncode to turn the dictionary into a json and JSONDecode to turn the json into a dictionary

1 Like
#5

Are any of the stats userdata values such as CFrames or NumberRanges?

1 Like
#6

You can also try doing:

local Stats = {}
Stats.CharName = Player:WaitForChild("CharSettings"):WaitForChild("CharacterName").Value
Stats.Cash = Player:WaitForChild("Stats"):WaitForChild("Cash").Value
Stats.Bank = Player:WaitForChild("Stats"):WaitForChild("Bank").Value
Stats.PlayTime = Player:WaitForChild("Stats"):WaitForChild("PlayTime").Value

That way you can be sure that the script has waited for these values before attempting to save the table.

You can also make checks:

if Stats.CharName and Stats.Cash and Stats.Bank and Stats.PlayTime then
	-- save
else
	-- error handling
end
#7

Yea they are all userdata values

1 Like
#8

Theres your issue, you cannot save userdata values directly (not even in dictionaries)

1 Like
#9

You can’t save userdata values. Go through all of your stats you’re saving, and print(type(stat)). If it prints userdata then you’ll have to save that value differently.

4 Likes
#10

If you’re looking to save Roblox objects, you would need to serialize it’s properties (no official method) and save that table.

#11

What approach would you use to save userdata value through tables? Would turning the dictionary into a json be the most effective?

#12

Shouldn’t be that hard. You could use the new Roblox json API dump to find the right values to read and write.

#13

I would just make a function to serialize the userdata and turn them into tables, and another function to create the userdata from the raw tables. For example, a CFrame serialize:

function serializeCF(cf)
	return {cf:GetComponents()}
end

function makeCFFromRaw(rawCF)
	return CFrame.new(unpack(rawCF))
end

Edit: I don’t know whether this is better than a JSON approach or not, I haven’t looked into it much.

2 Likes
#14

I have a module that handles JSON encoding/decoding dictionaries with userdata support: https://www.roblox.com/library/1005802894/JSON-with-Userdata-Support

4 Likes