57: attempt to index field 'len' (a string value)

[Pifi]

Hi. Help me! PLS! What CMD means - (a string value)?

include("shared.lua")
surface.CreateFont("NameYourFont",{font = "Arial",extended = false,size = 50, weight = 500})

function ENT:Initialize()
    self.len = {"text","ani","",""}
    self.deni = 1
    print(self.deni)
end

function ENT:Draw()
    self:DrawModel()
    local oang = self:GetAngles()

    local ang1 = self:GetAngles()
    local pos1 = self:GetPos()

    ang1:RotateAroundAxis(oang:Up(), -270)
    ang1:RotateAroundAxis(oang:Right(), 0)

    pos1 = pos1 + oang:Forward() * -20 + oang:Up() * 2 + oang:Right() * 40

    cam.Start3D2D(pos1,ang1,0.1)
        draw.SimpleTextOutlined(self.len[1], 'NameYourFont', 0,0,Color(255,255,255), TEXT_ALIGN_LEFT ,TEXT_ALIGN_TOP,1,Color(0,0,0,alpha))
    cam.End3D2D()
    cam.Start3D2D(pos1 + oang:Right() * -40,ang1,0.1)
        draw.SimpleTextOutlined(self.len[2], 'NameYourFont', 0,0,Color(255,255,255), TEXT_ALIGN_LEFT ,TEXT_ALIGN_TOP,1,Color(0,0,0,alpha))
    cam.End3D2D()

    net.Receive("SendDermaS",function()
            local frame = vgui.Create("DFrame")
            frame:SetSize(500,200)
            frame:Center()
            frame:SetVisible(true)
            frame:MakePopup()

            local NumberWang = vgui.Create("DNumberWang",frame)
            NumberWang:SetPos(25,80)
            NumberWang:SetEnterAllowed(true)
            NumberWang:SetMax(15)
            NumberWang:SetMin(1)
            NumberWang:SetDecimals(self.deni)
            function NumberWang:OnValueChanged()
                self.deni = NumberWang:GetValue()
                print(self.deni)
            end
            print(self.deni .. "main")

            local TextEntry = vgui.Create( "DTextEntry", frame ) -- create the form as a child of fram
            TextEntry:SetPos( 25, 50 )
            TextEntry:SetSize( 85, 20 )
            TextEntry:SetEnterAllowed(true)
            TextEntry:SetText(self.len[self.deni])
            TextEntry.OnEnter = function()
                self.deni = NumberWang:GetValue()
                print(self.deni .. " world")
                self.len[self.deni] = TextEntry:GetValue()    
                print(self.len[1])
            end
    end)
end

57 - self.len[self.deni] = TextEntry:GetValue() 

[c👌de_g🎷]

You shouldn't declare a net.Receive in an ENT:Draw - it will add a new receive hook every time the entity draws. Declare it outside of the entity and send the entity in the serverside net message.

[bigdogmat]

Somewhere you're setting `self.len` to a string. It's not in the snippet you've posted.

PS: Don't define a net.Receive in ENTITY/Draw, network the entity in the net message and set it on that. Secondly, your `function NumberWang:OnValueChanged()`is overwriting the local `self` variable, so that `self.deni = NumberWang:GetValue()` is actually setting it on the NumberWang, not the entity.

[Pifi]

I only understood that I have to declare net outside.. but I don't know what I have to do with `self.deni`
How my code looks:

include("shared.lua")
surface.CreateFont("NameYourFont",{font = "Arial",extended = false,size = 50, weight = 500})

function ENT:Initialize()
    self.len = {"text","ani","",""}
    self.deni = 1
    print(self.deni)
end

net.Receive("SendDermaS",function()
        local frame = vgui.Create("DFrame")
        frame:SetSize(500,200)
        frame:Center()
        frame:SetVisible(true)
        frame:MakePopup()

        local NumberWang = vgui.Create("DNumberWang",frame)
        self.deni = NumberWang:GetValue()
        NumberWang:SetPos(25,80)
        NumberWang:SetEnterAllowed(true)
        NumberWang:SetMax(15)
        NumberWang:SetMin(1)
        NumberWang:SetDecimals(self.deni)
        print(self.deni)

        print(self.deni .. "main")

        local TextEntry = vgui.Create( "DTextEntry", frame ) -- create the form as a child of fram
        TextEntry:SetPos( 25, 50 )
        TextEntry:SetSize( 85, 20 )
        TextEntry:SetEnterAllowed(true)
        TextEntry:SetText(self.len[self.deni])
        TextEntry.OnEnter = function()
            self.deni = NumberWang:GetValue()
            print(self.deni .. " world")
            self.len[self.deni] = TextEntry:GetValue()    
            print(self.len[1])
        end
end)

function ENT:Draw()
    self:DrawModel()
    local oang = self:GetAngles()

    local ang1 = self:GetAngles()
    local pos1 = self:GetPos()

    ang1:RotateAroundAxis(oang:Up(), -270)
    ang1:RotateAroundAxis(oang:Right(), 0)

    pos1 = pos1 + oang:Forward() * -20 + oang:Up() * 2 + oang:Right() * 40

    cam.Start3D2D(pos1,ang1,0.1)
        draw.SimpleTextOutlined(self.len[1], 'NameYourFont', 0,0,Color(255,255,255), TEXT_ALIGN_LEFT ,TEXT_ALIGN_TOP,1,Color(0,0,0,alpha))
    cam.End3D2D()
    cam.Start3D2D(pos1 + oang:Right() * -40,ang1,0.1)
        draw.SimpleTextOutlined(self.len[2], 'NameYourFont', 0,0,Color(255,255,255), TEXT_ALIGN_LEFT ,TEXT_ALIGN_TOP,1,Color(0,0,0,alpha))
    cam.End3D2D()
end       

[c👌de_g🎷]

You aren't defining self in your net callback - you have to net.WriteEntity the entity you want to use serverside, then net.ReadEntity clientside in the callback.

[SweptThrone]

I'm no expert, and I guess this is kinda a question if I'm wrong, but
since ".len" is a part of the string library, is it trying to run ".len" on "self", expecting it to be "string" or of the same type instead and failing?

[bigdogmat]

No

`foo[1] = bar`
In the above example Lua will attempt to look up the `__newindex` meta method for `foo`. If it doesn't have one and it's not a table then it'll error with "attempt to index global 'foo' (a typename value)".

Only difference between my example and the problem in this thread is that it's a table field so it says "field" instead of "global".

[Pifi]

-_-
ERROR: 9: attempt to index global 'self' (a nil value) -  self.deni = net.ReadEntity()

SERVER SIDE
function ENT:AcceptInput( name, activator, caller )
    if( !caller:IsValid() || !caller:IsPlayer() || name != "Use" ) then return end
    net.Start('SendDermaS')
    net.WriteEntity(self.denis)
    net.Broadcast()
end   
CLIENT SIDE
net.Receive("SendDermaS",function()
        self.deni = net.ReadEntity()

        local frame = vgui.Create("DFrame")
        frame:SetSize(500,200)
        frame:Center()
        frame:SetVisible(true)
        frame:MakePopup()

        local NumberWang = vgui.Create("DNumberWang",frame)
        NumberWang:SetPos(25,80)
        NumberWang:SetEnterAllowed(true)
        NumberWang:SetMax(15)
        NumberWang:SetMin(1)
        NumberWang:SetDecimals(self.deni)
        print(self.deni)

        print(self.deni .. "main")

        local TextEntry = vgui.Create( "DTextEntry", frame ) -- create the form as a child of fram
        TextEntry:SetPos( 25, 50 )
        TextEntry:SetSize( 85, 20 )
        TextEntry:SetEnterAllowed(true)
        TextEntry:SetText(self.len[self.deni])
        TextEntry.OnEnter = function()
            self.deni = NumberWang:GetValue()
            print(self.deni .. " world")
            self.len[self.deni] = TextEntry:GetValue()    
            print(self.len[1])
        end
end)

[Bronson]

I have not used 'self' much but im pretty sure in a net.Receive it is not able to be used so self.deni = net.ReadEntity() would not work as self does not exist, try setting the variable to something else like local local variableName = net.ReadEntity() since there is no point appending it to self when it is only called within that function.

[c👌de_g🎷]

Not self.deni, just self.

[Pifi]

Aa? Yes, maybe I am a little bit dumb.. but I am just learning
Error: attempt to concatenate field 'm_iDecimals' (a nil value)
net.Receive("SendDermaS",function()
        self = net.ReadEntity() ---?????

        local frame = vgui.Create("DFrame")
        frame:SetSize(500,200)
        frame:Center()
        frame:SetVisible(true)
        frame:MakePopup()

        local NumberWang = vgui.Create("DNumberWang",frame)
        NumberWang:SetPos(25,80)
        NumberWang:SetEnterAllowed(true)
        NumberWang:SetMax(15)
        NumberWang:SetMin(1)
        NumberWang:SetDecimals(self.deni)
        print(self.deni)

        print(self.deni .. "main")

        local TextEntry = vgui.Create( "DTextEntry", frame ) -- create the form as a child of fram
        TextEntry:SetPos( 25, 50 )
        TextEntry:SetSize( 85, 20 )
        TextEntry:SetEnterAllowed(true)
        TextEntry:SetText(self.len[self.deni])
        TextEntry.OnEnter = function()
            self.deni = NumberWang:GetValue()
            print(self.deni .. " world")
            self.len[self.deni] = TextEntry:GetValue()    
            print(self.len[1])
        end
end)

[c👌de_g🎷]

Can you post your serverside code? Also, make self a local variable.

[charozoid]

What exactly are you trying to create? We can keep helping you fix errors but it would be better to know what you're trying to do and maybe offer a better solution.

[Pifi]

CLIENT SIDE
include("shared.lua")
surface.CreateFont("NameYourFont",{font = "Arial",extended = false,size = 50, weight = 500})

function ENT:Initialize()
    self.len = {"text","ani","",""}
end

net.Receive("SendDermaS",function()
        self = net.ReadEntity()

        local frame = vgui.Create("DFrame")
        frame:SetSize(500,200)
        frame:Center()
        frame:SetVisible(true)
        frame:MakePopup()

        local NumberWang = vgui.Create("DNumberWang",frame)
        NumberWang:SetPos(25,80)
        NumberWang:SetEnterAllowed(true)
        NumberWang:SetMax(15)
        NumberWang:SetMin(1)
        NumberWang:SetDecimals(self.deni)
        print(self.deni)

        print(self.deni .. "main")

        local TextEntry = vgui.Create( "DTextEntry", frame ) -- create the form as a child of fram
        TextEntry:SetPos( 25, 50 )
        TextEntry:SetSize( 85, 20 )
        TextEntry:SetEnterAllowed(true)
        TextEntry:SetText(self.len[self.deni])
        TextEntry.OnEnter = function()
            self.deni = NumberWang:GetValue()
            print(self.deni .. " world")
            self.len[self.deni] = TextEntry:GetValue()    
            print(self.len[1])
        end
end)

function ENT:Draw()
    self:DrawModel()
    local oang = self:GetAngles()

    local ang1 = self:GetAngles()
    local pos1 = self:GetPos()

    ang1:RotateAroundAxis(oang:Up(), -270)
    ang1:RotateAroundAxis(oang:Right(), 0)

    pos1 = pos1 + oang:Forward() * -20 + oang:Up() * 2 + oang:Right() * 40

    cam.Start3D2D(pos1,ang1,0.1)
        draw.SimpleTextOutlined(self.len[1], 'NameYourFont', 0,0,Color(255,255,255), TEXT_ALIGN_LEFT ,TEXT_ALIGN_TOP,1,Color(0,0,0,alpha))
    cam.End3D2D()
    cam.Start3D2D(pos1 + oang:Right() * -40,ang1,0.1)
        draw.SimpleTextOutlined(self.len[2], 'NameYourFont', 0,0,Color(255,255,255), TEXT_ALIGN_LEFT ,TEXT_ALIGN_TOP,1,Color(0,0,0,alpha))
    cam.End3D2D()
end     
   SERVER SIDE
AddCSLuaFile("cl_init.lua")
AddCSLuaFile("shared.lua")
include("shared.lua")

util.AddNetworkString("SendDermaS")

function ENT:Initialize()
    self:SetModel("models/hunter/plates/plate1x2.mdl")
    self:SetMaterial("models/rendertarget")
    self:PhysicsInit(SOLID_VPHYSICS)
    self:SetMoveType(MOVETYPE_VPHYSICS)
    self:SetSolid(SOLID_VPHYSICS)
    self:SetUseType(SIMPLE_USE)
    self.isRunning = false
    local phys = self:GetPhysicsObject()
    if(phys:IsValid()) then
        phys:Wake()
    end    
end

function ENT:AcceptInput( name, activator, caller )
    if( !caller:IsValid() || !caller:IsPlayer() || name != "Use" ) then return end
    net.Start('SendDermaS')
    net.WriteEntity(self.denis)
    net.Broadcast()
end    

[c👌de_g🎷]

You're still writing self.denis even though should be writing self. Also, again, make self a local variable clientside.

[Pifi]

And what I have to do with this local variable?
Error: 35: attempt to index global 'self' (a nil value) - TextEntry:SetText(self.len[deni])
SERVER SIDE
AddCSLuaFile("cl_init.lua")
AddCSLuaFile("shared.lua")
include("shared.lua")

util.AddNetworkString("SendDermaS")

function ENT:Initialize()
    self:SetModel("models/hunter/plates/plate1x2.mdl")
    self:SetMaterial("models/rendertarget")
    self:PhysicsInit(SOLID_VPHYSICS)
    self:SetMoveType(MOVETYPE_VPHYSICS)
    self:SetSolid(SOLID_VPHYSICS)
    self:SetUseType(SIMPLE_USE)
    self.isRunning = false
    local phys = self:GetPhysicsObject()
    if(phys:IsValid()) then
        phys:Wake()
    end    
end

function ENT:AcceptInput( name, activator, caller )
    if( !caller:IsValid() || !caller:IsPlayer() || name != "Use" ) then return end
    net.Start('SendDermaS')
    net.WriteEntity(self)
    net.Broadcast()
end    

CLIENT SIDE
include("shared.lua")
surface.CreateFont("NameYourFont",{font = "Arial",extended = false,size = 50, weight = 500})

function ENT:Initialize()
    self.len = {"text","ani","",""}
end

net.Receive("SendDermaS",function()
        local deni = net.ReadEntity()
        print(deni)

        local frame = vgui.Create("DFrame")
        frame:SetSize(500,200)
        frame:Center()
        frame:SetVisible(true)
        frame:MakePopup()

        local NumberWang = vgui.Create("DNumberWang",frame)
        deni = NumberWang:GetDecimals()
        print(deni)
        NumberWang:SetPos(25,80)
        NumberWang:SetEnterAllowed(true)
        NumberWang:SetMax(15)
        NumberWang:SetMin(1)
        NumberWang:SetDecimals(deni)

        print(deni .. "main")

        local TextEntry = vgui.Create( "DTextEntry", frame ) -- create the form as a child of fram
        TextEntry:SetPos( 25, 50 )
        TextEntry:SetSize( 85, 20 )
        TextEntry:SetEnterAllowed(true)
        TextEntry:SetText(self.len[deni])
        TextEntry.OnEnter = function()
            deni = NumberWang:GetValue()
            print(deni .. " world")
            self.len[deni] = TextEntry:GetValue()    
            print(self.len[1])
        end
end)

function ENT:Draw()
    self:DrawModel()
    local oang = self:GetAngles()

    local ang1 = self:GetAngles()
    local pos1 = self:GetPos()

    ang1:RotateAroundAxis(oang:Up(), -270)
    ang1:RotateAroundAxis(oang:Right(), 0)

    pos1 = pos1 + oang:Forward() * -20 + oang:Up() * 2 + oang:Right() * 40

    cam.Start3D2D(pos1,ang1,0.1)
        draw.SimpleTextOutlined(self.len[1], 'NameYourFont', 0,0,Color(255,255,255), TEXT_ALIGN_LEFT ,TEXT_ALIGN_TOP,1,Color(0,0,0,alpha))
    cam.End3D2D()
    cam.Start3D2D(pos1 + oang:Right() * -40,ang1,0.1)
        draw.SimpleTextOutlined(self.len[2], 'NameYourFont', 0,0,Color(255,255,255), TEXT_ALIGN_LEFT ,TEXT_ALIGN_TOP,1,Color(0,0,0,alpha))
    cam.End3D2D()
end       

[c👌de_g🎷]

Why did you rename the self variable to deni?

[Pifi]

You said: You have to create local variable. And what I have to do with it? Sit and watch in monitor? XD I guess I have to use this variable

[c👌de_g🎷]

I meant keep the previous variable name "self" but make it local - not change it to deni.

[Pifi]

Like that =( ? And what next
net.Receive("SendDermaS",function()
        local self = net.ReadEntity()
        print(deni)

        local frame = vgui.Create("DFrame")
        frame:SetSize(500,200)
        frame:Center()
        frame:SetVisible(true)
        frame:MakePopup()

        local NumberWang = vgui.Create("DNumberWang",frame)
        NumberWang:SetPos(25,80)
        NumberWang:SetEnterAllowed(true)
        NumberWang:SetMax(15)
        NumberWang:SetMin(1)
        NumberWang:SetDecimals(self.deni)
        print(self.deni)

        print(self.deni .. "main")

        local TextEntry = vgui.Create( "DTextEntry", frame ) -- create the form as a child of fram
        TextEntry:SetPos( 25, 50 )
        TextEntry:SetSize( 85, 20 )
        TextEntry:SetEnterAllowed(true)
        TextEntry:SetText(self.len[self.deni])
        TextEntry.OnEnter = function()
            self.deni = NumberWang:GetValue()
            print(self.deni .. " world")
            self.len[self.deni] = TextEntry:GetValue()    
            print(self.len[1])
        end
end)

[c👌de_g🎷]

Looks fine with your previous entity code - what's the issue?

[Pifi]

attempt to concatenate field 'm_iDecimals' (a nil value)
cl_init.lua:24

CL SIDE
include("shared.lua")
surface.CreateFont("NameYourFont",{font = "Arial",extended = false,size = 50, weight = 500})

function ENT:Initialize()
    self.len = {"text","ani","",""}
end

net.Receive("SendDermaS",function()
        local self = net.ReadEntity()
        print(deni)

        local frame = vgui.Create("DFrame")
        frame:SetSize(500,200)
        frame:Center()
        frame:SetVisible(true)
        frame:MakePopup()

        local NumberWang = vgui.Create("DNumberWang",frame)
        NumberWang:SetPos(25,80)
        NumberWang:SetEnterAllowed(true)
        NumberWang:SetMax(15)
        NumberWang:SetMin(1)    
        NumberWang:SetDecimals(self.deni)
        print(self.deni)

        print(self.deni .. "main")

        local TextEntry = vgui.Create( "DTextEntry", frame ) -- create the form as a child of fram
        TextEntry:SetPos( 25, 50 )
        TextEntry:SetSize( 85, 20 )
        TextEntry:SetEnterAllowed(true)
        TextEntry:SetText(self.len[self.deni])
        TextEntry.OnEnter = function()
            self.deni = NumberWang:GetValue()
            print(self.deni .. " world")
            self.len[self.deni] = TextEntry:GetValue()    
            print(self.len[1])
        end
end)

function ENT:Draw()
    self:DrawModel()
    local oang = self:GetAngles()

    local ang1 = self:GetAngles()
    local pos1 = self:GetPos()

    ang1:RotateAroundAxis(oang:Up(), -270)
    ang1:RotateAroundAxis(oang:Right(), 0)

    pos1 = pos1 + oang:Forward() * -20 + oang:Up() * 2 + oang:Right() * 40

    cam.Start3D2D(pos1,ang1,0.1)
        draw.SimpleTextOutlined(self.len[1], 'NameYourFont', 0,0,Color(255,255,255), TEXT_ALIGN_LEFT ,TEXT_ALIGN_TOP,1,Color(0,0,0,alpha))
    cam.End3D2D()
    cam.Start3D2D(pos1 + oang:Right() * -40,ang1,0.1)
        draw.SimpleTextOutlined(self.len[2], 'NameYourFont', 0,0,Color(255,255,255), TEXT_ALIGN_LEFT ,TEXT_ALIGN_TOP,1,Color(0,0,0,alpha))
    cam.End3D2D()
end       
SV SIDE
AddCSLuaFile("cl_init.lua")
AddCSLuaFile("shared.lua")
include("shared.lua")

util.AddNetworkString("SendDermaS")

function ENT:Initialize()
    self:SetModel("models/hunter/plates/plate1x2.mdl")
    self:SetMaterial("models/rendertarget")
    self:PhysicsInit(SOLID_VPHYSICS)
    self:SetMoveType(MOVETYPE_VPHYSICS)
    self:SetSolid(SOLID_VPHYSICS)
    self:SetUseType(SIMPLE_USE)
    self.isRunning = false
    local phys = self:GetPhysicsObject()
    if(phys:IsValid()) then
        phys:Wake()
    end    
end

function ENT:AcceptInput( name, activator, caller )
    if( !caller:IsValid() || !caller:IsPlayer() || name != "Use" ) then return end
    net.Start('SendDermaS')
    net.WriteEntity(self)
    net.Broadcast()
end    

[c👌de_g🎷]

You are calling NumberWang:SetDecimals(self.deni) before you define self.deni - maybe you should define it to 1 by default in your ENT:Initialize?

[Pifi]

Wow! Much better! But when I press Enter to change text CMD says:
attempt to index global 'NumberWang' (a nil value) :27: -
self.deni = NumberWang:GetValue()

[c👌de_g🎷]

Because "self" refers to the entity read off the netstream - you can't access the entity until you've stored it into a variable, hence local self.

[Pifi]

I made small test and when I change value of the NumberWang print spams about twenty times

https://files.facepunch.com/forum/upload/157971/c15e482e-16f9-4421-a9ec-f9259671d808/изображение.png

[c👌de_g🎷]

Maybe you should store your frame and numberwang to the (self.frame, etc.) entity and check if one exists before creating a new one.

[Pifi]

 Error:attempt to index field 'TextEntry' (a nil value)
function self.NumberWang:OnValueChanged(val)    
            if !( IsValid(entity ) ) then
                self.TextEntry:SetText(self.len[val])
            end
        end

[c👌de_g🎷]

You have to put an actual variable in the IsValid parenthesis - entity is nil. Also, think about your code logically: if an entity is NOT VALID, run this code. Seems backwards.

[Pifi]

Too hard... actual variable of what?