Value of self.current_collection becomes nil in a different function

Questions
#1

Why is it that the value of self.current_collection becomes nil in the load_collection function?

function init(self)
	self.current_collection = "Main"
end

local function load_collection(self,proxy_id)
	print(self.current_collection)
	if self.current_collection ~= "Main" then 
		msg.post(self.current_collection, "unload")
	end 

	msg.post(proxy_id, load)
	self.current_collection = proxy_id
end 

function on_message(self, message_id, message, sender)
	if message_id == hash("load1") then 
		load_collection("#collection1")
		
	elseif message_id == hash("proxy_loaded") then 
		msg.post(sender, "enable")
	end
end
#2

You’re missing self in the parameters. Should be:

load_collection(self, "#collection1")
#3

Oh thank you very much