sbx320 / lua_utils Goto Github PK

Hey,

I love classlib, thanks for distributing it open source.

I have a question though, I am probably using destroy( ) wrong and I'm trying to look for the right way to do it but cannot find good examples and I am not sure if this is an error of my own or if it's the utility's fault.

ERROR: classlib.lua:126: bad argument #1 to 'pairs' (table expected, got nil)

That points to parentClasses and according to my knowledge my class/object has no parent classes, or at least I don't define them anywhere.

Here is the script I am trying to create.

local Class = { }

function Class:connect( hostname, username, password, database )
    self.instance = enew( Connection.create( 'mysql', 'dbname=' .. database .. ';host=' .. hostname, username, password, 'share=0;batch=0;log=1;tag=script' ), self )

    if ( self.instance ) then
        return self.instance
    end

    return false
end

function Class:disconnect( )
    if ( isElement( self.instance ) ) then
        self.instance:destroy( )
    end

    -- delete( self )
end

local database = new( Class )
database:connect( 'hostname', 'username', 'password', 'database' )
database:disconnect( )

What possibly could be wrong? The delete( self ) has been commented out, but what I want Class:disconnect( ) to do, is destroy the Connection element and essentially just delete the object.

Feel free to let me know if I should be doing my class in any different way. I am really new to the MTA OOP/Lua OOP scene so I'm trying to get into that to get better :-)

Whenever I try to create a new class object with enew of a player element, it throws a warning to the debug log, saying that onElementDestroy event is already being handled by the function, how is this possible? MTA restricts listening to certain player events?

enew( getPlayerFromName( 'Socialz' ), classes.player )

WARNING: classlib.lua:59: Bad usage @ 'addEventHandler' ['onElementDestroy' with this function is already handled]

I added getElementType(element) ~= 'player' to my version, but if I understand it right, we should never ignore this event as it deletes stuff from memory and if it's never deleted we have a memory leak.

Using onPlayerQuit instead of onElementDestroy did not resolve the warning.

All functions that use getmetatable use the previously set metatable instead of the one stored in the Lua registry.

i copy enew example from wiki ,but it can not work and ouput attempt to call method 'boom' (a nil value)

Great job sbx320, your lib is very usefull for me. I saw function addChangeHandler at wiki, but cant find it in current sources. May be, is equivalent exists now?

Hello! You can add a wiki using your classlib?
Thx

Reproduce with

Foo = { bar = 12 }
addChangeHandler(Foo, print)
Foo.bar = 1

Expected result would be an output.

This is caused by __newindex not being called on existing keys