ply attempt to index global. But the function is serverside

[ryanm2711]

Hello, I've not done gmod lua for couple of months so I might be missing something obvious. I'm creating a forcefield around an entity. For test I made it kill player in area but I
cannot test it because I have the issue of ply attempting to index global.

local IsForceFieldActivated = false;

if SERVER then
    function PART:Use()
    local exterior = self.exterior
        self:EmitSound( Sound( "doctorwho1200/coral/keyboard2.wav" ))
        if(!IsForceFieldActivated) then
            if(ents.FindInSphere(exterior:GetPos(), 30)) then
                ply:Kill()
            end
        end
    end
end

[DEBUNKED]

It's not defined anywhere in your code

[ryanm2711]

I did local ply = LocalPlayer() Would it be outside or inside function?

[DEBUNKED]

Local player is nothing on the server side

[ryanm2711]

What would I do to 'define' it?

[dubb]

Use the second argument of ENTITY/Use

[ryanm2711]

Fixed it now. Now I got the forcefield to work but I need a way to disable if not in the area. I did this

local IsForceFieldActivated = false;

if SERVER then
    function PART:Use(ply)
    local exterior = self.exterior
        self:EmitSound( Sound( "doctorwho1200/coral/keyboard2.wav" ))
        if(!IsForceFieldActivated) then
            if(ents.FindInSphere(exterior:GetPos(), 30)) then
                ply:GodEnable()
            end
        IsForceFieldActivated = true;
        else
        if(IsForceFieldActivated) then
            self:EmitSound( Sound( "doctorwho1200/coral/keyboard2.wav" ))
            ply:GodDisable()
            IsForceFieldActivated = false;
        end
    end

    function PART:Think(ply)
        if(!ents.FindInSphere(exterior:GetPos(), 30)) then
            ply:GodDisable()
        end
    end
end
end

[dubb]

Think doesn't have any arguments
ents.FindInSphere returns a table, so your if check isn't going to do anything
You should use the second argument of Use as per the wiki
I would use a table to track who has god mode enabled from the sphere and use that to see if the player left the sphere.

[ryanm2711]

Like this?

local IsForceFieldActivated = false;

if SERVER then
    function PART:Use(ply)
    local exterior = self.exterior
        self:EmitSound( Sound( "doctorwho1200/coral/keyboard2.wav" ))
        if(!IsForceFieldActivated) then
            for k,v in pairs(ents.FindInSphere(exterior:GetPos(), 30)) do
                if(v:HasGodMode()) then
                    v:GodEnable()
                else
                    v:GodDisable()
                end
            end
        IsForceFieldActivated = true;
        else
        if(IsForceFieldActivated) then
            self:EmitSound( Sound( "doctorwho1200/coral/keyboard2.wav" ))
            ply:GodDisable()
            IsForceFieldActivated = false;
        end
    end
end
end