Issues with Metatables and Logging

[khamarr3524]

Hello, I'm currently working on a project where I have a file Unit.lua containing a global table tUnit with tUnit.__index = tUnit set. tUnit is used to create table instances of units through passing a table through tUnit:new{args}. For some reason, using

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function tUnit:new(t)
    setmetatable(t, self)

it says t is a nil value.

I've extensively read about metatables and this is baffling in how irritating this is. tUnit has various functions defined and throughout tUnit:new(t) I use the self operator to initialize values. No matter what I do, t is continuously nil, and the meta table breaks. Any ideas? What am I doing wrong here?

Secondly, I am trying to set up a logging system and need to know how I can reopen a log that is already created and write to it. Do I just use love.filesystem.newFile with the same name? It works for the first line, but I don't know anything else because the tUnit class is breaking.

[kikito]

Hi there, welcome to LÖVE!

Your problem probably lies on a different line than the 2 you showed us.

Please give us the complete stack trace and all the source code. Ideally, give us a *.love file so we can execute it quickly and trace it ourselves. Otherwise it's very difficult to help you.

Good luck, in any case !

[khamarr3524]

Here's the .love. I believe a lot of the code is probably messy and needs to be redone entirely, it's probably the cause of my problem. I've been tweaking it for a few days now.

Edit: Most of my questions were really on how to best implement these structural ideas. I would like to find the best implementations and what should be done. Sometimes just patching code can frustrate me and make it seem like the concepts behind it are muddy. More often than not, because of how modular I make my code I can simply scrap a "module" or section of the code to improve the interfacing capacity, make it more readable, modifiable, and be more conceptually sound.

[kikito]

tUnit.new expected two parameters (tUnit and t) but you only gave it one (t).

Your issue is that in main.lua you wrote:

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 tUnit.new{ ... }

Instead, you should write this:

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 tUnit:new({ ... })

That is the same as writing this:

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 tUnit.new(tUnit, { ... })

Which is what you wanted.

[khamarr3524]

Ah, i forgot that .syntax doesn't carry the class over. Thanks so much, I knew it was simple.

[Engineer]

tUnit.new expected two parameters (tUnit and t) but you only gave it one (t). ]
Instead, you should write this:

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 tUnit:new({ ... })

That is the same as writing this:

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 tUnit.new(tUnit, { ... })

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 tUnit:new { } 

This is also valid.