attempt to call a nil value | require "json" (plugin JSON is installed)

Comments

• keszegh Member

  March 2022

  you can convert the module to a class quite easily, someone should post it here or on the wiki actually. (i have a further modification, so that would not be that good for sharing)

  Longtitle Productions, creator of
  Fragmenter - animated loop machine and IKONOMIKON - the memory game

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• talis Guru

  March 2022 edited March 2022

  hi definisto, as far as remember when you are using external lua modules like dataSaver,
  you should mark 'exclude from execution' in gideros studio. Because on run every lua file is merged into one main.lua file which datasaver.lua shouldn't be merged into.
  please try it, hence i am not using gideros for so long just my memory reminds me of such an error when i read your post.
  hope it will help.
  

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• definisto Member

  March 2022

  talis said:

  hi definisto, as far as remember when you are using external lua modules like dataSaver,
  you should mark 'exclude from execution' in gideros studio. Because on run every lua file is merged into one main.lua file which datasaver.lua shouldn't be merged into.
  please try it, hence i am not using gideros for so long just my memory reminds me of such an error when i read your post.
  hope it will help.
  

  when i've did this i'm getting such error

  attempt to index nil with 'saveValue'

  
  I think it because when i exclude dataSaver.lua from execution, in main.lua file dataSaver.saveFile command can't be recognized

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• keszegh Member

  March 2022 edited March 2022 Accepted Answer

  to make it a class do this:
  replace

  module("dataSaver", package.seeall)

  with:

  DataSaver = Core.class() function DataSaver.init() end

  and then the functions should look like this:

  function DataSaver.saveValue(key, value)

  etc.

  Likes: definisto

  Longtitle Productions, creator of
  Fragmenter - animated loop machine and IKONOMIKON - the memory game

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• talis Guru

  March 2022

  in your code maybe you are trying to insert a null value to your json?
  If this is the case can you do it like this;
  -Use Json.Null() to insert a null value into a Json object
  
  This is from json.lua file in github.
  https://github.com/ar2rsawseen/Json/blob/master/json.lua
  

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• definisto Member

  March 2022

  talis said:

  in your code maybe you are trying to insert a null value to your json?
  If this is the case can you do it like this;
  -Use Json.Null() to insert a null value into a Json object
  
  This is from json.lua file in github.
  

  No, the problem was in dataSaver.lua in this line

  module("dataSaver", package.seeall)

  I replaced it with

  function DataSaver.init() end

  and renamed the functions in dataSaver.lua and everything is now working

  Likes: MoKaLux, talis

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