# Create rails app using old version of rails

**URL:** <https://www.ruby-forum.com/t/create-rails-app-using-old-version-of-rails/119916>\
**Category:** Rails\
**Created:** [November 12, 2007, 6:08am UTC](https://www.ruby-forum.com/t/create-rails-app-using-old-version-of-rails/119916 "2007-11-12T06:08:47Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Chuong\_Huynh](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/3bc359/32.png) [@Chuong\_Huynh](https://www.ruby-forum.com/u/Chuong_Huynh)\
**Post date:** [November 12, 2007, 6:08am UTC](https://www.ruby-forum.com/t/create-rails-app-using-old-version-of-rails/119916/1 "2007-11-12T06:08:47Z")

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Hi all,

This may be a silly question, but how can we create a new rails  
(skeleton) app using an older version of rails on the system?  
Say I’ve installed rails 2.0 (RC), and now I want to create a rails  
1.2.5 app (the corresponding gems already installed). how could I do  
that?

Thanks.

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**Author:** ![Chuong\_Huynh](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/3bc359/32.png) [@Chuong\_Huynh](https://www.ruby-forum.com/u/Chuong_Huynh)\
**Post date:** [November 12, 2007, 7:00am UTC](https://www.ruby-forum.com/t/create-rails-app-using-old-version-of-rails/119916/2 "2007-11-12T07:00:11Z")

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It’s pretty easy. Specify the full path to rails in your 1.2.5 gems  
folder. On my system, that is usr/local/lib/ruby/gems/1.8/gems/  
rails-1.2.4/bin/rails. Make sure that the new app has the proper  
version set in environment.rb. Thats it.

-Bill

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**Author:** ![Chuong\_Huynh](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/3bc359/32.png) [@Chuong\_Huynh](https://www.ruby-forum.com/u/Chuong_Huynh)\
**Post date:** [November 12, 2007, 8:10am UTC](https://www.ruby-forum.com/t/create-rails-app-using-old-version-of-rails/119916/3 "2007-11-12T08:10:18Z")

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Thanks, I will try.

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**Author:** ![Chuong\_Huynh](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/3bc359/32.png) [@Chuong\_Huynh](https://www.ruby-forum.com/u/Chuong_Huynh)\
**Post date:** [November 12, 2007, 8:18am UTC](https://www.ruby-forum.com/t/create-rails-app-using-old-version-of-rails/119916/4 "2007-11-12T08:18:29Z")

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On Nov 12, 2007 4:59 PM, William P. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> It’s pretty easy. Specify the full path to rails in your 1.2.5 gems  
> folder. On my system, that is usr/local/lib/ruby/gems/1.8/gems/  
> rails-1.2.4/bin/rails. Make sure that the new app has the proper  
> version set in environment.rb. Thats it.
> 
> -Bill

Alternatively:

rails _1.2.5_ appname

(Works for any executable in a gem. 🙂