Class is returning empty table

[Galicate (Gal)]

This is my class, i’m trying to make a proxy so that I can detect when a property is changed, however the class is empty unless I create the key after I construct it, such as

Task.new()
Task.Name = "Task"
print(Task.Name) -> "Task"
print(Task.IsCompleted) -> nil

local Task = {}
Task.__index = Task

function Task.new(callback)
	local self = setmetatable({}, Task)

	-- Properties
	self.Name = "Task"
	self.IsCompleted = false
	self._Callback = callback or nil
	self._Objectives = {}
	self.Players = {}

	-- Events
	self.Changed = Signal.new()
	self.Completed = Signal.new()

	local proxy = setmetatable({}, {
		__index = function(_, key)
			return self[key]
		end,
		__newindex = function(_, key, value)
			if self[key] ~= value then
				self[key] = value
				self.Changed:Fire(key, value)
			end
		end
	})

	return proxy
end

[Galicate (Gal)]

Solved

local Task = {}
Task.__index = Task

function Task.new(callback)
	local self = {}

	-- Properties
	self.Name = "Task"
	self.IsCompleted = false
	self._Callback = callback or nil
	self._Objectives = {}
	self.Players = {}

	-- Events
	self.Changed = Signal.new()
	self.Completed = Signal.new()

	local proxy = setmetatable(Task, {
		__index = function(_, key)
			if self[key] ~= nil then
				return self[key]
			end
			return Task[key]
		end,
		__newindex = function(_, key, value)
			if self[key] ~= value then
				self[key] = value
				self.Changed:Fire(key, value)
			end
		end
	})

	return proxy
end