CODEWITHSUNDEEP
luaworld-of-warcraft
Nathan1995
Nathan1995

Reputation: 111

attempt to index field 'text' (a nil value)

I am receiving the following error in my wow client during addon development/

83x FrameXML\OptionsFrameTemplates.lua:157: attempt to index field 
'text' (a nil value)
FrameXML\OptionsFrameTemplates.lua:157: in function <FrameXML\OptionsFrameTemplates.lua:156>

Locals:
self = ShiftDropDown_Button {
 0 = <userdata>
 toggle = ShiftDropDown_ButtonToggle {
 }
}
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = "attempt to index field 'text' (a nil value)"

I am calling it in the XML file with this

        <Button name="ShiftDropDown_Button" inherits="InterfaceOptionsListButtonTemplate" text="Select Target">
            <Size>
                <AbsDimension x="150" y="10" />
            </Size>
            <Anchors>
                <Anchor point="TOPLEFT">
                    <Offset x="189" y="-115" />
                </Anchor>
            </Anchors>
            <Scripts>
                <OnLoad>
                    ShiftDropDown_Button_OnLoad(self)
                </OnLoad>
                <OnClick>
                    ShiftDropDownFrame:Show()
                </OnClick>
            </Scripts>

and the function in the Lua is here 

function ShiftDropDown_Button_OnLoad(self)
    self:RegisterEvent('ADDON_LOADED')
    self:SetScript('OnEvent', function(self, event, ...)
        if event == 'ADDON_LOADED' and ... == 'TauntMasterReborn' then
            TauntMasterRebornDB = TauntMasterRebornDB or {}
            for option, value in pairs(TauntM_defaults) do
                if not TauntMasterRebornDB[option] then TauntMasterRebornDB[option] = value end
            end
            self:SetText(TauntMasterRebornDBChar.SHIFTTARGET1)
        end
    end)
end

Can anyone shed some light on why it is throwing this error? I have searched through lots of examples and cannot find a way to debug this or solve myself.

Upvotes: 2

Views: 2359

Answers (1)

Syncrow
Syncrow

Reputation: 71

Your button inherits from InterfaceOptionsListButtonTemplate which inherits initially from OptionsListButtonTemplate.

This template has a button text:

<ButtonText name="$parentText" justifyH="LEFT" wordwrap="false"/>

Here is the code, where the error occures:

function OptionsListButton_OnEnter (self)
  if (self.text:IsTruncated()) then
    GameTooltip:SetOwner(self, "ANCHOR_RIGHT");
    GameTooltip:SetText(self:GetText(), NORMAL_FONT_COLOR[1], NORMAL_FONT_COLOR[2], NORMAL_FONT_COLOR[3], 1, true);
  end
end

It tries to use the property value of the button text - in this case self - by using self.text. The text parentKey isn't assigned in the xml file but in the OnLoad function, which was overwritten by yours.

To fix your template, you have to expand your ShiftDropDown_Button_OnLoad function:

function ShiftDropDown_Button_OnLoad(self)
    self.text = _G[self:GetName() .. "Text"];
    self.highlight = self:GetHighlightTexture();

    self:RegisterEvent('ADDON_LOADED')
    self:SetScript('OnEvent', function(self, event, ...)
        if event == 'ADDON_LOADED' and ... == 'TauntMasterReborn' then
            TauntMasterRebornDB = TauntMasterRebornDB or {}
            for option, value in pairs(TauntM_defaults) do
                if not TauntMasterRebornDB[option] then TauntMasterRebornDB[option] = value end
            end
            self:SetText(TauntMasterRebornDBChar.SHIFTTARGET1)
        end
    end)
end

Upvotes: 5

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