My code cant find a function in my module script Roblox - module

Question

I'm writing a 2D game engine in Roblox for fun, but I have run into an issue.
It seems my code cant find the function I'm referencing.
My output says:
Players.SpookyDervish.PlayerGui.SpookyEngine.SpookyEngine:31: attempt to call a nil value
I have 3 module scripts and a main script.
Here is my explorer window:
The main script:
local gui = script.Parent
local spookyEngine = require(gui:WaitForChild("SpookyEngine"))
spookyEngine.Init()
spookyEngine:CreateObject("TestObject", Vector2.new(0, 0), Vector2.new(50, 50), "rbxassetid://183598555", Color3.fromRGB(85, 170, 255))
wait(2)
spookyEngine:Transform("test", Vector2.new(50, 50), Vector2.new(50, 50), 0)
My SpookyEngine module:
local object = require(script:WaitForChild("Object"))
local input = require(script:WaitForChild("Input"))
local gui = script.Parent
local spookyEngine = {}
function spookyEngine.Init()
spookyEngine.screen = Instance.new("Frame", gui)
spookyEngine.screen.Name = "Screen"
spookyEngine.screen.Position = UDim2.new(0.5, 0, 0.5, 0)
spookyEngine.screen.Size = UDim2.new(1.25, 0, 1.25, 0)
spookyEngine.screen.AnchorPoint = Vector2.new(0.5, 0.5)
spookyEngine.screen.BackgroundColor3 = Color3.fromRGB(0, 0, 0)
spookyEngine.screen.BorderSizePixel = 0
spookyEngine.screen.BorderColor3 = Color3.fromRGB(0, 0, 0)
object.Init()
spookyEngine.objects = object.objects
game.StarterGui:SetCoreGuiEnabled(Enum.CoreGuiType.All, false)
print("INFO: Initialized SpookyEngine!")
end
function spookyEngine:CreateObject(name, pos, size, sprite, colour)
object.New(name, pos, size, sprite, colour)
end
function spookyEngine:Transform(object, pos, size, rotation)
object:Transform(nil, nil, nil, nil)
end
return spookyEngine
My object module:
local spookyEngine = script.Parent
local gui = spookyEngine.Parent
local Object = {}
Object.__index = Object
function Object.Init()
local Objects = Instance.new("Folder", gui.Screen)
Objects.Name = "Objects"
Object.objects = Objects
end
function Object.New(name, pos, size, sprite, colour)
local newObject = {}
setmetatable(newObject, Object)
local position = UDim2.new(0.5, pos.X, 0.5, pos.Y)
local objectSize = UDim2.new(0, size.X, 0, size.Y)
local newObjectInstance = Instance.new("Frame", Object.objects)
newObjectInstance.Name = name
newObjectInstance.Position = position
newObjectInstance.Size = objectSize
newObjectInstance.BackgroundColor3 = colour
newObjectInstance.AnchorPoint = Vector2.new(0.5, 0.5)
newObjectInstance.BorderSizePixel = 0
if sprite ~= nil then
local objectSprite = Instance.new("ImageLabel", newObjectInstance)
objectSprite.Size = UDim2.new(1, 0, 1, 0)
objectSprite.Name = "Sprite"
objectSprite.Image = sprite
objectSprite.BackgroundTransparency = 1
objectSprite.BackgroundColor3 = colour
newObjectInstance.BackgroundTransparency = 1
end
newObject.Name = name
newObject.Position = position
newObject.Size = objectSize
newObject.Sprite = sprite
newObject.Colour = colour
newObject.Instance = newObjectInstance
return newObject
end
function Object:Transform(object, pos, size, rotation)
object = tostring(object)
if Object.objects:FindFirstChild(object) then
else
warn("ERROR: Cant find object with name: '"..object.."'")
end
end
return Object
Any help would be appreciated!

Answer 1

Your error is pointing at this line :
function spookyEngine:Transform(object, pos, size, rotation)
object:Transform(nil, nil, nil, nil)
end
which is called by...
spookyEngine:Transform("test", Vector2.new(50, 50), Vector2.new(50, 50), 0)
Because you have a function argument named object, it shadows the object local variable that you used to define your module. So the string that you pass in is what gets used. So you are effectively trying to execute
string.Transform("test", nil, nil, nil, nil)
The lua string library does not have a function called Transform, so when you try to index the function, it comes back as nil. That is why you get the error attempt to call a nil value.
Since you intended to use the Object:Transform function from your module, the easy fix is to rename the function argument to avoid the name collision. Try something like :
function spookyEngine:Transform(obj, pos, size, rotation)
object:Transform(obj, pos, size, rotation)
end