Creating a new rails app in 3.0.10 while I have 3.1.3

Question

I want to create a new rails app in 3.0.10 but the latest rails in my machine is 3.1.3. If I run:

gem list rails

Then I get the following output:

*** LOCAL GEMS ***

rails (3.1.3, 3.0.11, 3.0.10, 3.0.9, 3.0.7, 3.0.6, 3.0.4.rc1)
rails3-jquery-autocomplete (1.0.5)

Now I have applications in both 3.1 and 3.0 so I don't want to remove 3.1. How can I create this new rails app in 3.0.10?

Hi visit http://stackoverflow.com/questions/379141/specifying-rails-version-to-use-when-creating-a-new-application — Soundar Rathinasamy, Mar 19 '12 at 06:25
@soundar looks like that worked. Put the same comment in the answer and I will accept it. — Kashyap, Mar 19 '12 at 06:28

Aldo 'xoen' Giambelluca · Accepted Answer · 2014-02-12T18:17:04.760

29

To create a rails application for a specific version you can use this syntax: $rails _3.0.10_ new appname

NOTE: The underscores are needed.

edited Feb 12 '14 at 18:17

answered Mar 19 '12 at 07:19

Aldo 'xoen' Giambelluca

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For a moment I thought the underscores were used as emphasis, but they're actually part of this undocumented syntax. – Lloeki Feb 12 '14 at 13:57

score 3 · Answer 2 · answered Mar 19 '12 at 07:20

You should definitely use RVM (ruby version manager), to use different versions of rails can be reached easily:

rvm gemset create rails3
rvm gemset create rails3.2
rvm gemset create rails3.1

then, to you should use on of them to create rails project

rvm gemset use rails3 && gem install rails -v 3.0.10
rvm gemset use rails3.2 && gem install rails -v 3.2.2
rvm gemset use rails3.1 && gem install rails -v 3.1

Creating a new rails app in 3.0.10 while I have 3.1.3

2 Answers2