# How to validate a patch submitted to rails core using .git **URL:** \ **Category:** Rails\ **Created:** [May 11, 2009, 3:11pm UTC](https://www.ruby-forum.com/t/how-to-validate-a-patch-submitted-to-rails-core-using-git/167686 "2009-05-11T15:11:39Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![dorelal](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/3da27b/32.png) [@dorelal](https://www.ruby-forum.com/u/dorelal)\ **Post date:** [May 11, 2009, 3:11pm UTC](https://www.ruby-forum.com/t/how-to-validate-a-patch-submitted-to-rails-core-using-git/167686/1 "2009-05-11T15:11:39Z")
This is what I did. I have Rails 2.3.2 installed. rails demo ruby script/generate scaffold User name:string rake db:create rake db:migrate > ruby script/console > Loading development environment (Rails 2.3.2) > > > User.first > > User Load (0.3ms) SELECT \* FROM “users” LIMIT 1 > > =\> nil > > > So far so good. Now I will freeze rails. > rake rails:freeze:gems > Try script/console again > > > User.first > > User Load (0.3ms) SELECT \* FROM “users” LIMIT 1 > > =\> nil Now I will get rid of frozen rails. > rake rails:unfreeze > (in /Users/nkumar/dev/scratch/demo) > rm -rf vendor/rails Now I will install rails from github so that later I could apply the patch. > git clone git://github.com/rails/rails.git Now I will try script/console and I get error. Loading development environment (Rails 2.3.2) /Library/Ruby/Site/1.8/rubygems/requirement.rb:150:in `parse':ArgumentError: Illformed requirement ["~> 1.1.pre"] /Library/Ruby/Site/1.8/rubygems/requirement.rb:150:in`parse’:ArgumentError: Illformed requirement ["~\> 1.1.pre"] /Users/nkumar/dev/scratch/demo/vendor/rails/railties/lib/console\_with\_helpers.rb:5:NameError: uninitialized constant ApplicationController > > User.first > > NameError: uninitialized constant User > > from (irb):1 Notice that I have not even applied the patch I want to test. I am just getting ready to apply the patch. If I look at vendor/rails I see following directories. -rw-r–r-- 1 nkumar staff 3019 May 11 09:07 Rakefile drwxr-xr-x 9 nkumar staff 306 May 11 09:07 actionmailer drwxr-xr-x 10 nkumar staff 340 May 11 09:07 actionpack drwxr-xr-x 7 nkumar staff 238 May 11 09:07 activemodel drwxr-xr-x 11 nkumar staff 374 May 11 09:07 activerecord drwxr-xr-x 8 nkumar staff 272 May 11 09:07 activeresource drwxr-xr-x 10 nkumar staff 340 May 11 09:07 activesupport drwxr-xr-x 8 nkumar staff 272 May 11 09:07 ci drwxr-xr-x 3 nkumar staff 102 May 11 09:07 doc -rwxr-xr-x 1 nkumar staff 416 May 11 09:07 pushgems.rb drwxr-xr-x 18 nkumar staff 612 May 11 09:07 railties -rwxr-xr-x 1 nkumar staff 723 May 11 09:07 release.rb drwxr-xr-x 3 nkumar staff 102 May 11 09:07 tools When I had done rake:rails:freeze then I had following directories. drwxr-xr-x 9 nkumar staff 306 May 11 09:09 actionmailer drwxr-xr-x 10 nkumar staff 340 May 11 09:09 actionpack drwxr-xr-x 10 nkumar staff 340 May 11 09:09 activerecord drwxr-xr-x 7 nkumar staff 238 May 11 09:09 activeresource drwxr-xr-x 5 nkumar staff 170 May 11 09:09 activesupport drwxr-xr-x 16 nkumar staff 544 May 11 09:09 railties Can someone tell me what is the right way to test a patch. I know Rails contribution guide has information on how to test a patch. However the document tells you to checkout rails from github and then apply a patch. I did. However how do I tell my demo app to use the newly patch applied rails version. The only way I know of is to do vendor/rails and ,as I illustrated above, that did not work for me. ---
**Author:** ![dorelal](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/3da27b/32.png) [@dorelal](https://www.ruby-forum.com/u/dorelal)\ **Post date:** [May 11, 2009, 3:47pm UTC](https://www.ruby-forum.com/t/how-to-validate-a-patch-submitted-to-rails-core-using-git/167686/2 "2009-05-11T15:47:27Z")
On May 11, 2:11 pm, Raj S. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > Now I will try script/console and I get error. > Loading development environment (Rails 2.3.2) > /Library/Ruby/Site/1.8/rubygems/requirement.rb:150:in > `parse':ArgumentError: Illformed requirement ["~> 1.1.pre"] /Library/Ruby/Site/1.8/rubygems/requirement.rb:150:in `parse’:ArgumentError: Illformed requirement [“~\> 1.1.pre”] > /Users/nkumar/dev/scratch/demo/vendor/rails/railties/lib/console\_with\_helpe rs.rb:5:NameError: IIRC with edge rails you need the latest version of rubygems (1.3.3 currently). Fred ---
**Author:** ![dorelal](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/3da27b/32.png) [@dorelal](https://www.ruby-forum.com/u/dorelal)\ **Post date:** [May 11, 2009, 4:10pm UTC](https://www.ruby-forum.com/t/how-to-validate-a-patch-submitted-to-rails-core-using-git/167686/3 "2009-05-11T16:10:01Z")
Thanks Frederick. I upgraded ro rubygems 1.3.3 and things are working fine. Thank you.