downgrade rails 3.1 project from ruby 1.9.2 to 1.8.7

rubyonrails-talk
1

Hey this may be a dumb question but I am attempting to downgrade my ruby version to 1.8.7 for my rails 3.1 project, since that is the version supported by my hosting solution. I have uninstalled 1.9.2 and installed ruby 1.8.7 on my dev machine and when I ran bundle install and my gems installed just fine. But when I tried to run 'rails server' I got some funny errors:

Invalid gemspec in [C:/Ruby187/lib/ruby/gems/1.8/specifications/execjs-1.2.4.gemspec]: invalid date format in specification: "2011-08-03 00:00:00.000000000Z" Invalid gemspec in [C:/Ruby187/lib/ruby/gems/1.8/specifications/rack-cache-1.0.3.gemspec]: invalid date format in specification: "2011-08-27 00:00:00.000000000Z" Invalid gemspec in [C:/Ruby187/lib/ruby/gems/1.8/specifications/tilt-1.3.3.gemspec]: invalid date format in specification: "2011-08-25 00:00:00.000000000Z" Invalid gemspec in [C:/Ruby187/lib/ruby/gems/1.8/specifications/execjs-1.2.4.gemspec]: invalid date format in specification: "2011-08-03 00:00:00.000000000Z" Invalid gemspec in [C:/Ruby187/lib/ruby/gems/1.8/specifications/rack-cache-1.0.3.gemspec]: invalid date format in specification: "2011-08-27 00:00:00.000000000Z" Invalid gemspec in [C:/Ruby187/lib/ruby/gems/1.8/specifications/tilt-1.3.3.gemspec]: invalid date format in specification: "2011-08-25 00:00:00.000000000Z" Invalid gemspec in [C:/Ruby187/lib/ruby/gems/1.8/specifications/execjs-1.2.4.gemspec]: invalid date format in specification: "2011-08-03 00:00:00.000000000Z" Invalid gemspec in [C:/Ruby187/lib/ruby/gems/1.8/specifications/rack-cache-1.0.3.gemspec]: invalid date format in specification: "2011-08-27 00:00:00.000000000Z" Invalid gemspec in [C:/Ruby187/lib/ruby/gems/1.8/specifications/tilt-1.3.3.gemspec]: invalid date format in specification: "2011-08-25 00:00:00.000000000Z" ←[31mCould not find rack-cache-1.0.3 in any of the sources←[0m ←[33mRun `bundle install` to install missing gems.←[0m

I just went through all the steps to install 1.8.7 and 'gem install rails' to get everything in order, and it looked like it installed rack-cache just fine

'Successfully installed rack-cache-1.0.3'

If anyone has any tips on how to clean this up and successfully downgrade my ruby version I would greatly appreciate it!

Thanks!

2

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If anyone has any tips on how to clean this up and successfully downgrade my ruby version I would greatly appreciate it!

I think you want to use RVM - http://beginrescueend.com/

Dan Nachbar

3

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If anyone has any tips on how to clean this up and successfully downgrade my ruby version I would greatly appreciate it!

I think you want to use RVM - http://beginrescueend.com/

+1, but doesn't 3.1 require 1.9.2 or better? I could swear that's a given.

Walter

4

+1, but doesn't 3.1 require 1.9.2 or better? I could swear that's a given.

Is Rails 3.1 only available on 1.9.2? I was going by this:

which says it only requires 1.8.7 or higher, but to avoid a couple 1.8.7 versions because they don't work.

5

I think I saw that an upcoming version of rails will require 1.9.2 but up till then 1.8.7 is fine.

Colin

6

I think you want to use RVM - http://beginrescueend.com/

So if I use rvm or pik (on windows: GitHub - vertiginous/pik: Ruby version manager for Windows) that should clear up those problems?

7

Sorry, yes pik for Windows. I assume pik works comparably. (I know almost nothing about Windows.)

From what you've sent (and the fact that I am not a windows guy) it's a little hard for me to guess how deep a hole you are in and consequently if starting with RVM/pik now will fix what all that is broken.

My point is more that having RVM/pik in place eliminates the need to uninstall/reinstall in order to dynamically switch versions.

So, if I were in your shoes, I'd set up RVM/pik then install ruby 1.8.7 (and ruby 1.9.2 if you wish) and rails 3.1, and try again.

Dan Nachbar

8

Qualify this with : I am a ruby and rails newbie so for what it's worth:

I recently started the rails journey and was working in windows using cygwin etc... I switched to ubuntu and originally was trying to make ruby 1.8.7 work with 3.1.0 and it just wasn't happening... can't remember the details of the problems I was having but they were numerous...

I switched to 1.9.2 and rails 3.1.0 and it's been pretty smooth sailing since... still haven't gotten great results in windows but haven't spent much time trying since I got ubuntu working and solid. I do have a friend who works in windows (not sure if he does just ruby or does rails too though).... but he uses mingw which I set up and did feel better about....

Fwiw...

Max

[mailto:rubyonrails-talk@googlegroups.com] On Behalf Of Colin Law