How to get rid of these warnings in strict mode?

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#1

So I just started Object Oriented Programming but I run to this annoying problem. I keep getting warnings saying that setmetatable should take a table and that animationTracks cannot be added to a table.

--!strict
local Creature = require(script.Parent)

local Enemy = {}
Enemy.__index = Enemy
setmetatable(Enemy, Creature)

function Enemy.new(model: Model)
	local newEnemy = Creature.new(model)
	setmetatable(newEnemy, Enemy)
	
	newEnemy.animationTracks = {}

	return newEnemy
end

return Enemy
I get the following warnings

image

setmetatable should take a table

image
image731×25 2.16 KB

cannot add property "animationTrack" to table

How can I get rid of them? Any workaround or other solution that would work?

#2

Shot in the dark but it might be because you don’t have a type for creature? It should go away once you assert that it’s a table.

This doesn’t give me any typecheck errors:

--!strict

type Creature = {
	animator: Animator;
	config: Configuration;
	model: Model;
	root: BasePart
}

local creature = Creature.new() :: Creature

setmetatable(creature, {})
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#3

Thanks, it works. What about this one, it’s really confusing and makes no sense to me.

image
image1009×234 6.9 KB 

--!strict

local Movement = {}
Movement.__index = Movement

function Movement.new(model: Model, path: Folder)
	local newMovement = {}
	setmetatable(newMovement, Movement)
    -- ...
    return newMovement
end

function Movement:Start()
    -- ...
end

return Movement

local movement = Movement.new(model, path)
movement:Start()

This does not only happen to Start(), it happens to all functions really.

#4

I see.

You can try using assertion to assert that movement is of proper type.

type movement = {
    alignPosition: AlignPosition;
    lastSpeed: number;
    -- etc
}

local movement = Movement.new(model, path) :: movement -- use 2 colons to assert that it's of proper type
movement:Start()
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#5

Now the last question, I get this really awful warning.

image

and it only pops up as soon as I add child.Value even with :: number it will not go away.

task.delay(child.Value :: number, function()

end)

image

#6

I think it has to do with your assertion.

Assert that child is a Number/IntValue and you should be able to remove the child.Value :: number assertion.

#7

image

It makes no difference.

It works with number but not my child.Value

image

#8

Are you asserting child is an intValue? You could also make another variable which is kinda redundant but it should work.

local number = child.Value :: number
task.delay(number, function() --...
#9

It worked only after I made two variables and asserted them.

local freezeInfo = child :: NumberValue
local freezeTime = freezeInfo.Value :: number
task.delay(freezeTime, function()

end)
1 Like