# Switching between Rails 3 and Rails 2 **URL:** \ **Category:** Rails\ **Created:** [April 4, 2010, 5:52am UTC](https://www.ruby-forum.com/t/switching-between-rails-3-and-rails-2/186304 "2010-04-04T05:52:38Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![smarter](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/9fc29f/32.png) [@smarter](https://www.ruby-forum.com/u/smarter)\ **Post date:** [April 4, 2010, 5:52am UTC](https://www.ruby-forum.com/t/switching-between-rails-3-and-rails-2/186304/1 "2010-04-04T05:52:38Z")
Hi there: Any docs that show best ways (preferably on Mac) to switch between Rails 3 and Rails2…that is Upgrade and Downgrade both? ---
**Author:** ![smarter](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/9fc29f/32.png) [@smarter](https://www.ruby-forum.com/u/smarter)\ **Post date:** [April 4, 2010, 6:59am UTC](https://www.ruby-forum.com/t/switching-between-rails-3-and-rails-2/186304/2 "2010-04-04T06:59:44Z")
This may help [http://robotarmyma.de/post/446214895/users-cjs-home-notes-rvm](http://robotarmyma.de/post/446214895/users-cjs-home-notes-rvm) ---
**Author:** ![smarter](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/9fc29f/32.png) [@smarter](https://www.ruby-forum.com/u/smarter)\ **Post date:** [April 4, 2010, 8:18am UTC](https://www.ruby-forum.com/t/switching-between-rails-3-and-rails-2/186304/3 "2010-04-04T08:18:10Z")
On Sat, Apr 3, 2010 at 8:52 PM, Smart RoR [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > Hi there: > > Any docs that show best ways (preferably on Mac) to switch between Rails > 3 and Rails2…that is Upgrade and Downgrade both? In regards to upgrading, I would recommend taking a look at the following: > **[加速器ios免费|免费加速器](https://www.railsupgradehandbook.com)** > > 加速器ios免费成立于2002年7月，是一家壹级劳务分包企业，公司管理机制完善，技术力量雄厚，具备了模板工、木工、钢筋工、抹灰工、瓦工、架子工、混凝土工、水电暖工为一体的专业综合施工能力。以建设厂房、综合楼、高层住宅为主 > **[GitHub - rails/rails\_upgrade: Plugin to run checks on your Rails 2.x/3.x to...](https://github.com/rails/rails_upgrade)** > > Plugin to run checks on your Rails 2.x/3.x to check for obvious upgrade points on the path to 3.0 - GitHub - rails/rails\_upgrade: Plugin to run checks on your Rails 2.x/3.x to check for obvious upg... Good luck, -Conrad ---
**Author:** ![smarter](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/9fc29f/32.png) [@smarter](https://www.ruby-forum.com/u/smarter)\ **Post date:** [April 4, 2010, 2:30pm UTC](https://www.ruby-forum.com/t/switching-between-rails-3-and-rails-2/186304/4 "2010-04-04T14:30:15Z")
The downgrade or may be just switching between both. rails _2.3.5_ and rails _3.0.0_ styles may not work if both 2.3.5 and 3.0.0 is there? Just want to be able to switch easily on Mac. ---
**Author:** ![smarter](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/9fc29f/32.png) [@smarter](https://www.ruby-forum.com/u/smarter)\ **Post date:** [April 6, 2010, 2:14pm UTC](https://www.ruby-forum.com/t/switching-between-rails-3-and-rails-2/186304/5 "2010-04-06T14:14:00Z")
On Sun, Apr 4, 2010 at 8:30 AM, Smart RoR [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > Just want to be able to switch easily on Mac. > If you are talking about switching between different projects using > different rails versions, as opposed to switching a particular project > between different rails versions, then you should look into rvm which > allows you to manage not only different versions of ruby on the same > machine but different gemsets for different projects. ## [http://rvm.beginrescueend.com/](http://rvm.beginrescueend.com/) [Avoiding Rails 3 Dependency Hell With RVM | railway](http://www.railway.at/2010/02/13/avoiding-rails-3-dependency-hell-with-rvm/) Rick DeNatale Blog: [http://talklikeaduck.denhaven2.com/](http://talklikeaduck.denhaven2.com/) Github: [rubyredrick (Rick DeNatale) · GitHub](http://github.com/rubyredrick) Twitter: @RickDeNatale WWR: [http://www.workingwithrails.com/person/9021-rick-denatale](http://www.workingwithrails.com/person/9021-rick-denatale) LinkedIn: [http://www.linkedin.com/in/rickdenatale](http://www.linkedin.com/in/rickdenatale) ---
**Author:** ![smarter](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/9fc29f/32.png) [@smarter](https://www.ruby-forum.com/u/smarter)\ **Post date:** [April 9, 2010, 5:16pm UTC](https://www.ruby-forum.com/t/switching-between-rails-3-and-rails-2/186304/6 "2010-04-09T17:16:44Z")
Rick Denatale wrote: > On Sun, Apr 4, 2010 at 8:30 AM, Smart RoR [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > > Just want to be able to switch easily on Mac. > > If you are talking about switching between different projects using > > different rails versions, as opposed to switching a particular project > > between different rails versions, then you should look into rvm which > > allows you to manage not only different versions of ruby on the same > > machine but different gemsets for different projects. > > ## [http://rvm.beginrescueend.com/](http://rvm.beginrescueend.com/) [Avoiding Rails 3 Dependency Hell With RVM | railway](http://www.railway.at/2010/02/13/avoiding-rails-3-dependency-hell-with-rvm/) > > Rick DeNatale > > Blog: [http://talklikeaduck.denhaven2.com/](http://talklikeaduck.denhaven2.com/) > Github: [rubyredrick (Rick DeNatale) · GitHub](http://github.com/rubyredrick) > Twitter: @RickDeNatale > WWR: [http://www.workingwithrails.com/person/9021-rick-denatale](http://www.workingwithrails.com/person/9021-rick-denatale) > LinkedIn: [http://www.linkedin.com/in/rickdenatale](http://www.linkedin.com/in/rickdenatale) This answers it: [http://www.railway.at/2010/02/13/avoiding-rails-3-dependency-hell-with-rvm/](http://www.railway.at/2010/02/13/avoiding-rails-3-dependency-hell-with-rvm/) Thanks.