How can I add a weight system to my inventory?

[Yikegaming]

So currently on my server I have a basic inventory system, and im trying to add weight so I have this

function ply:databaseGetValue( name )
	local d = self:databaseGet()
	return d[name]
end


function ply:inventoryGet()
	local i = self:databaseGetValue( "inventory" )
	return i
end


function ply:computeWeight( ply, name, amount, tab )

	
	local i = self:inventoryGet()
	local itemName = getItems( name )
	local weight = 0
	local inventory = databaseGetValue("inventory") or {}
	for k,v in pairs(inventory) do
		local i = getItems(k)
		v.itemTWeight = v.amount * i.weight
		weight = v.itemTWeight + v.itemTWeight
		self:databaseSetValue( "weight", weight)
	end
end

function ply:databaseSetValue( name, v )
	if not v then return end
	
	if type(v) == "table" then
		if name == "inventory" then
			for k,b in pairs(v) do
				if b.amount <= 0 then
					v[k] = nil
				end
			end
		end
	end
	
	local d = self:databaseGet()
	d[name] = v
	
	self:databaseSave()
	print( "Value " .. name .. " Set" )
end

The Idea is for every item in the players inventory, it computes the total weight of each item, so if I have 10 cans each waying 2 units, it would do 10 * 2 = 20 , 20 being the itemTWeight, then for every itemTWeight it adds them up to equal the total weight of the players inventory, but for some reason this isnt working, any help would be appreciated

P.S. DatabaseSetValue() Works in other instances and I think the problem is just my for loop

[Brassx]

function ply:computeWeight( ply, name, amount, tab )

	
	local i = self:inventoryGet()
	local itemName = getItems( name )
	local weight = 0
	local inventory = databaseGetValue("inventory") or {}
	for k,v in pairs(inventory) do
		local i = getItems(k)
		v.itemTWeight = v.amount * i.weight
		weight = v.itemTWeight + v.itemTWeight --Right here. Simple logic error
		weight = weight + v.itemTWeight --Should be this

		self:databaseSetValue( "weight", weight)
	end
end

CHANGE weight = v.itemTWeight + v.itemTWeight  TO
weight = weight + v.itemTWeight 

You had a simple error. You were just resetting the weight value and adding the items weight to itself. Instead of weight = weight + itemweight.