Comments on: Ruby UUID Generator

By: UUIDHunter

UUIDHunter — Mon, 13 Sep 2010 19:23:12 +0000

Hello,

the first line in your example script ‘uuid = UUID.new’ throws this error: uninitialized constant UUID (NameError)

Any idea why?

Thanks

By: Alexey

Alexey — Mon, 08 Dec 2008 17:11:00 +0000

In windows you can easily do the trick with HOME system environment variable.

from command prompt:
set HOME=c:\home

But better:

right click on My Computer > Advanced tab > Environment variables button
then add “New variable” with name=”HOME” and value=”c:\home”
OK > OK

you’re done.

p.s. dont forget to create “c:\home” dir.
p.s.s. can replace “c:\home” with anything u want.

if you running “ruby server/start” from command prompt reopen it (command promt) to “reload” environment vars..

It worked for me.

Regards,

By: Assaf

Assaf — Thu, 20 Nov 2008 01:44:50 +0000

I don’t right now have a Windows setup to test this. I am working on that, but meanwhile if anyone can provide a patch.

By: Devon

Devon — Mon, 17 Nov 2008 22:29:32 +0000

I am getting the same error as the person above on my Windows development machine.

ArgumentError: couldn’t find HOME environment — expanding `~/.ruby-uuid
- this is using 2.0, I have the older version working just fine on a test server

By: Anonymous

Anonymous — Tue, 28 Oct 2008 15:06:08 +0000

OK, so I’m using 2.0 now, and it’s working OK on my production Linux box. But on my Windows development machine it keeps erring with this message:

ArgumentError in LoginController#signin

couldn’t find HOME environment — expanding `~/.ruby-uuid’

RAILS_ROOT: ./script/../config/..

Application Trace | Framework Trace | Full Trace

C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/uuid-2.0.1/lib/uuid.rb:147:in `expand_path’
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/uuid-2.0.1/lib/uuid.rb:147:in `state_file’
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/uuid-2.0.1/lib/uuid.rb:160:in `initialize’
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/uuid-2.0.1/lib/uuid.rb:113:in `new’
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/uuid-2.0.1/lib/uuid.rb:113:in `generate’
C:/InstantRails/rails_apps/lifespan/app/models/contact.rb:113:in `remember_me’
C:/InstantRails/rails_apps/lifespan/app/controllers/login_controller.rb:15:in `signin’
-e:2:in `load’
-e:2

I’ve added permissions to the C:\Documents and Settings\All Users\Application Data folder so that Everyone has modify (read/write/exec) access, but it still fails. I even created the file manually, but still the error. I take it there is also no longer a uuid.config option that can be used to set the path to the uuid file?

By: Assaf

Assaf — Fri, 10 Oct 2008 19:54:48 +0000

UUID 2.0 is not just better but also different, uuid-setup is gone, and API changed a bit. The documentation is now hosted on Github.

By: Chris Bloom

Chris Bloom — Fri, 10 Oct 2008 14:25:09 +0000

I’m currently running the uuid-2.0.1 gem, which worked before upgrading, but no longer. My app keeps erroring out with the message:

“can’t convert UUID into String”

Where do I call uuid-setup from? I tried it from my app root, but get a message saying:

“/usr/bin/uuid-setup:19:in `load’: no such file to load — uuid-setup”
“(LoadError) from /usr/bin/uuid-setup:19″

Any help would be appreciated.

By: Assaf

Assaf — Sat, 12 Apr 2008 02:38:37 +0000

You can call UUID.config and tell it where the state file is located.

The state file is used to record the node ID and a sequence number that gets incremented each time you start the application, to prevent duplicate IDs. It can be anywhere but ideally not in a temp directory because you want it to stick around.

By: Brian Meidell

Brian Meidell — Fri, 11 Apr 2008 08:19:59 +0000

Is there any chance you’d consider storing the uuid.state file in the temp dir or somewhere besides the current dir?
Also, any chance you could make uuid default to not print out status messages on every invoke?

By: Corey Jewett

Corey Jewett — Sun, 08 Apr 2007 03:39:57 +0000

Of course I can no longer reproduce the UUID problem. Very weird. I even turned fastthread on and off, but everything seems happy now. I don’t think fastthread was enabled in the first place. Regardless, ignore my last.