# Find the gems and plugins used in Rails Application

**URL:** <https://www.ruby-forum.com/t/find-the-gems-and-plugins-used-in-rails-application/175734>\
**Category:** Rails\
**Created:** [September 18, 2009, 6:30pm UTC](https://www.ruby-forum.com/t/find-the-gems-and-plugins-used-in-rails-application/175734 "2009-09-18T18:30:40Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![little\_kostas](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/f9ae1b/32.png) [@little\_kostas](https://www.ruby-forum.com/u/little_kostas)\
**Post date:** [September 18, 2009, 6:30pm UTC](https://www.ruby-forum.com/t/find-the-gems-and-plugins-used-in-rails-application/175734/1 "2009-09-18T18:30:40Z")

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Hi all!!

I want to copy my Rails Application to another computer. How can i  
make all the gems and plug-ins used in my computer available to the  
other computer without having to install each one seperatly again???

Is there a way to see only the gems and plugins used in my app not the  
gems i see when i run e.g gem-list command???

Thanx in advance  
Kostas L.

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**Author:** ![little\_kostas](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/f9ae1b/32.png) [@little\_kostas](https://www.ruby-forum.com/u/little_kostas)\
**Post date:** [September 20, 2009, 3:50am UTC](https://www.ruby-forum.com/t/find-the-gems-and-plugins-used-in-rails-application/175734/2 "2009-09-20T03:50:05Z")

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Ok thanx Litwin i’ll give it a try!

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**Author:** ![little\_kostas](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/f9ae1b/32.png) [@little\_kostas](https://www.ruby-forum.com/u/little_kostas)\
**Post date:** [September 21, 2009, 10:55am UTC](https://www.ruby-forum.com/t/find-the-gems-and-plugins-used-in-rails-application/175734/3 "2009-09-21T10:55:24Z")

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Just saw this. Would like to know what is Litwin’s answer?

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**Author:** ![little\_kostas](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/f9ae1b/32.png) [@little\_kostas](https://www.ruby-forum.com/u/little_kostas)\
**Post date:** [September 21, 2009, 12:40pm UTC](https://www.ruby-forum.com/t/find-the-gems-and-plugins-used-in-rails-application/175734/4 "2009-09-21T12:40:55Z")

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Yes please!

On Mon, Sep 21, 2009 at 11:55 AM, Sijo Kg

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<div class="post-metadata">

**Author:** ![little\_kostas](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/f9ae1b/32.png) [@little\_kostas](https://www.ruby-forum.com/u/little_kostas)\
**Post date:** [September 26, 2009, 10:28pm UTC](https://www.ruby-forum.com/t/find-the-gems-and-plugins-used-in-rails-application/175734/5 "2009-09-26T22:28:14Z")

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@Litwin: if i specify the gems in the environment.rb file, when i  
transfer the application  
and run gems:install all these gems will install automatically to the  
machine??  
Thanx

@xiexie11: i dont want only to see the gems used from the app, i want  
to know how to make them available when i transfer the app to another  
computer

Thanx

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<div class="post-metadata">

**Author:** ![little\_kostas](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/f9ae1b/32.png) [@little\_kostas](https://www.ruby-forum.com/u/little_kostas)\
**Post date:** [September 26, 2009, 11:01pm UTC](https://www.ruby-forum.com/t/find-the-gems-and-plugins-used-in-rails-application/175734/6 "2009-09-26T23:01:40Z")

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> @xiexie11: i dont want only to see the gems used from the app, i want  
> to know how to make them available when i transfer the app to another  
> computer
> 
> Thanx

If one of your gem is compiled, then you’ll run in troubles if the  
target computer is not the same as the source computer.

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<div class="post-metadata">

**Author:** ![little\_kostas](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/f9ae1b/32.png) [@little\_kostas](https://www.ruby-forum.com/u/little_kostas)\
**Post date:** [September 24, 2009, 12:22am UTC](https://www.ruby-forum.com/t/find-the-gems-and-plugins-used-in-rails-application/175734/7 "2009-09-24T00:22:09Z")

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If you just want to see what your app is using and you haven’t used  
config gem with the versions set, you can use the console and run:

Rails.configuration.gems.sort{|a,b| a.specification.name \<=\>  
b.specification.name}.collect{|g| “#{g.specification.name} - #  
{g.specification.version}”}