self in function

Questions
1

Hi, I need help with this unusual problem.

I have class where in function SmallCloud:init I initializing self.id. Here variable works, also in SmallCloud:draw() function. But when I call SmallCloud:update function, here have variable self.id a nil value. Why?

Code:

SmallCloud = class()

function SmallCloud:init(id,x,y,strana,pocet,ciel,rychlost)
    self.id=id
    self.x=x
    self.y=y
    self.strana=strana
    self.pocet=pocet
    self.ciel=ciel
    self.rychlost=rychlost
end

function SmallCloud:draw()
    pushStyle()
    if self.strana==1 then
        sprite("Dropbox:modry",self.x,self.y,40+self.pocet)
        fill(0,173,238,255)
    elseif self.strana==2 then
        sprite("Dropbox:red",self.x,self.y,40+self.pocet)
        fill(191,33,46)
    elseif self.strana==3 then
        sprite("Dropbox:orange",self.x,self.y,40+self.pocet)
        fill(255,156,43)
    end
    font("SourceSansPro-Regular")
    fontSize(25)
    --text(self.pocet,self.x,self.y)
    text(self.id,self.x,self.y)
    popStyle()
end


function SmallCloud:update()
    print(self.id)
end
2

Need to see more code. plugged it into a dummy main and it worked fine. Looks like you are setting the id to nil somewhere else.

3

In 99% of case when this happened to me, it was because i called cloud.update() instead of cloud:update().
The other 1% was when i used class NewClass(RootClass) the setup doesnt work to set properties, works only with methods.