Lua Very strange problem associated with ItemAttribute

[sestorme]

local function isBow(uid)
	uid = uid or 0
	if(getItemWeaponType(uid) == WEAPON_AXE) then
	return true
	end
	return false
end

function onSay(cid, words, param, channel)

local weapon = getPlayerSlotItem(cid, CONST_SLOT_LEFT)
	if(isBow(weapon.uid)) then

	local dmg = getItemAttribute(weapon.uid, "attack")
	local dmg2 = ((dmg) * 2)
	doItemSetAttribute(weapon.uid, "attack", dmg2)

	end
return true
end

It works, but:

It only works if item attribute:

doItemSetAttribute(weapon.uid, "attack", dmg2)

Has been previously set using straight value, not gained within a script, like:

doItemSetAttribute(weapon.uid, "attack", 123)

Otherwise it returns an error. It does work absolutely fine afterwards. Is there any chance to fix it or I need to build an array for all items?

ps. It's OnSay for testing purposes.

 

[SpiderOT]

Try this

local function isBow(uid)
	uid = uid or 0
	if(getItemWeaponType(uid) == WEAPON_AXE) then
	return true
	end
	return false
end
 
function onSay(cid, words, param, channel)
 
local weapon = getPlayerSlotItem(cid, CONST_SLOT_LEFT)
	if(isBow(weapon.uid)) then
 
	if getItemAttribute(weapon.uid, "attack") ~= nil then
		 dmg = getItemAttribute(weapon.uid, "attack")
	else
		 dmg = getItemInfo(weapon.itemid).attack
	end
	local dmg2 = ((dmg) * 2)
	doItemSetAttribute(weapon.uid, "attack", dmg2)
 
	end
return true
end

 

[Cykotitan]

(getItemAttribute(weapon.uid, "attack") or getItemInfo(weapon.itemid).attack) * 2