[I posted this earlier today but it didn’t show up on the list so i am
reposting. Pardon if you seen this already]
A few days ago I got a new Macbook Pro (yippie!). Until now, I was
using Instant Rails on Windows. I am now trying to get my rails
projects to run on the MBP having copied them from Windows.
From the terminal window, I can see that Rails and Ruby are installed
as advertised (–version works). For now, I am happy with Ruby 1.8.6
and Rails 1.2.6 that are on there. HOWEVER, when I try “ruby script/
server” or “ruby script/console” I keep getting the following error.
Cannot find gem for Rails ~>1.2.3.0:
Install the missing gem with ‘gem install -v=1.2.3 rails’, or
change environment.rb to define RAILS_GEM_VERSION with your
desired version.
What am I missing? Isn’t all the “basic” stuff preinstalled out of the
box? The project I am trying to run is very simple - no fancy gems or
anything. It was also built using 1.8.6
I read this http://developer.apple.com/tools/developonrailsleopard.html
but its trying to get me to update and I’d like to stick to 1.8.6 and
1.2.6 since some of my other projects are based on that.
Thanks, Roupen N.
nahabed wrote:
Cannot find gem for Rails ~>1.2.3.0:
Install the missing gem with ‘gem install -v=1.2.3 rails’, or
change environment.rb to define RAILS_GEM_VERSION with your
desired version.
Just do what the message tells you:
- either install version 1.2.3 with the provided gem command
- or change the dependency of your application to the installed 1.2.6
nahabed wrote:
Cannot find gem for Rails ~>1.2.3.0:
Install the missing gem with ‘gem install -v=1.2.3 rails’, or
change environment.rb to define RAILS_GEM_VERSION with your
desired version.
That’s the key. It means that your application has defined the rails
version to use in config/environment.rb, which is rails default
behaviour when you create a new project. I’d ignore the gem installation
and instead update the environment.rb file (or you can set the
RAILS_GEM_VERSION environment variable to “1.2.6”)
Find the line in that file that reads:
Specifies gem version of Rails to use when vendor/rails is not present
RAILS_GEM_VERSION = ‘1.2.3’ unless defined? RAILS_GEM_VERSION
and change it to read:
RAILS_GEM_VERSION = ‘1.2.6’ unless defined? RAILS_GEM_VERSION
and all should be well again.
Mac
That fixed it - thanks 
On Mar 16, 9:29 pm, Paul M. [email protected]