toJSON bug?

[Miika]

Hello there,

I've almost finished my vehicle shop / saving / control system but i got this error when i log out or reconnect:

ERROR: wangcars/shop_server.lua:16: Couldn't convert userdata argument to JSON, only valid resources can be included for this function.

I've tested and the result is table but toJSON says that it is userdata.

It still saves it to accountdata in toJSON and i can unpack it with fromJSON.

So is this mta bug or what?

Saving function:

addEventHandler("onPlayerLogout", root,
function(account)
	local data = getElementData(source, "wangcars.data")
	if data then
		if account and not isGuestAccount(account) then
			if isElement(wangvehicle[source]) then
				local id = getElementData(wangvehicle[source], "wangcars.id")
				local x, y, z = getElementPosition(wangvehicle[source])
				local rx, ry, rz = getElementRotation(wangvehicle[source])
				data[id][6] = x..", "..y..", "..z..", "..rx..", "..ry..", "..rz
				data[id][8] = getElementHealth(wangvehicle[source])
				setElementData(source, "wangcars.data", data)
				destroyElement(wangvehicle[source])
				wangvehicle[source] = nil
			end
			setAccountData(account, "wangcars.data", toJSON(getElementData(source, "wangcars.data"))) -- error there, but it still saves it
			setElementData(source, "wangcars.data", false)
			triggerClientEvent(source, "wangcars.refreshgrid", source)
		end
	end
end
)

I have almost same function when player quit but no need to post it.

 

I could just ignore this, but it's anoying because it always outputs error in debugscript when somebody disconnects and i'm trying to keep debug clean as possible.

Edited December 30, 2016 by Miika822

[myonlake]

It means you are trying to save something in JSON that is userdata (elements, usually in this case).

Edited December 30, 2016 by myonlake

[Miika]

1 minute ago, myonlake said:

It means you are trying to save something in JSON that is userdata (elements, usually in this case).

I'm trying to save the player's elementdata (which is table value) (tested). And it saves it. I can load the same account data and use fromJSON and it works fine. But it still gives me that error.

[myonlake]

1 minute ago, Miika822 said:

I'm trying to save the player's elementdata (which is table value) (tested). And it saves it. I can load the same account data and use fromJSON and it works fine. But it still gives me that error.

It still means there is something of userdata type in there. Give me a snapshot of the contents of the Lua table and I'll point out the problem.

Edited December 30, 2016 by myonlake

[Miika]

16 minutes ago, myonlake said:

It still means there is something of userdata type in there. Give me a snapshot of the contents of the Lua table and I'll point out the problem.

Oh now I understand what you mean. I have saved the vehicle (element) in table (what I don't even need to)

So can this be the thing causing error?:

table.insert(t, wangvehicle[client])

I am not currently in computer so I can't test.

[Captain Cody]

Yes that might be what is causing the issue; if you have a element defined in the table

fromJSON

will not be able to convert the string back to an element.

Edited December 30, 2016 by CodyL

[Miika]

Yeah, it's the only element, that table contains

Have to check it out next time I go to PC again.