Can't overwrite a file (Windows 10)

Getting Started Newbie Questions
#1

Is there some kind of a problem with Windows 10, Corona and file writing?

If the file doesn’t exists, the file is written. If the file exists, I’ll get an error message:

attempt to index local 'file' (a nil value)

Code:

local path = system.pathForFile( "gameData.json", system.DocumentsDirectory ) local file = io.open(path, "w") file:write( "Hi!") io.close( file )

Tried also with “w+”

When testing with Mac, everything works.

Corona version 2015.2731 (2015.10.5)
 

#2

Try using my io extensions instead of rolling your own, or dig through them and see if my code is different from yours:

http://github.com/roaminggamer/SSKCorona/blob/master/ssk/extensions/io.lua

If you use the file, save it in root as io_ext.lua or as io.lua a folder called extensions, then require it like this:

require "io\_ext" -- OR require "extensions.io"
#3

Here is a project with all the extensions you need for file IO and table/load save:

http://github.com/roaminggamer/RG_FreeStuff/raw/master/AskEd/2015/11/extensions.zip

Does this:

require "extensions.string" require "extensions.table" require "extensions.io" local settings = {} settings.volume = 0.5 settings.score = 10 settings.name = "Bob" settings.inventory = { "eggs", "bacon" } table.dump( settings ) table.print\_r( settings ) table.save( settings, "settings.json", system.DocumentsDirectory ) settings = nil -- clearing to prove it loads settings = table.load( "settings.json", system.DocumentsDirectory ) table.dump( settings ) table.print\_r( settings )

PS - I’m Running Windows 10 and I tested the above.  Works perfectly.  So, save time, use my stuff, and get yer game or app done.   :smiley:

#4

Thanks roaminggamer. Don’t know what it was, 'cause now everything works with my original codes. I think Windows temporarily locked the file/folder somehow… I used this code: https://github.com/robmiracle/Simple-Table-Load-Save-Functions-for-Corona-SDK

#5

Where was the game folder located?  You’re not keeping in under one of the ‘program’ folders are you?

If so, you don’t want to do that.  Keep it in a documents folder, desktop sub-folder, or separate data drive.

#6

Try using my io extensions instead of rolling your own, or dig through them and see if my code is different from yours:

http://github.com/roaminggamer/SSKCorona/blob/master/ssk/extensions/io.lua

If you use the file, save it in root as io_ext.lua or as io.lua a folder called extensions, then require it like this:

require "io\_ext" -- OR require "extensions.io"
#7

Here is a project with all the extensions you need for file IO and table/load save:

http://github.com/roaminggamer/RG_FreeStuff/raw/master/AskEd/2015/11/extensions.zip

Does this:

require "extensions.string" require "extensions.table" require "extensions.io" local settings = {} settings.volume = 0.5 settings.score = 10 settings.name = "Bob" settings.inventory = { "eggs", "bacon" } table.dump( settings ) table.print\_r( settings ) table.save( settings, "settings.json", system.DocumentsDirectory ) settings = nil -- clearing to prove it loads settings = table.load( "settings.json", system.DocumentsDirectory ) table.dump( settings ) table.print\_r( settings )

PS - I’m Running Windows 10 and I tested the above.  Works perfectly.  So, save time, use my stuff, and get yer game or app done.   :smiley:

#8

Thanks roaminggamer. Don’t know what it was, 'cause now everything works with my original codes. I think Windows temporarily locked the file/folder somehow… I used this code: https://github.com/robmiracle/Simple-Table-Load-Save-Functions-for-Corona-SDK

#9

Where was the game folder located?  You’re not keeping in under one of the ‘program’ folders are you?

If so, you don’t want to do that.  Keep it in a documents folder, desktop sub-folder, or separate data drive.