Rails 4 railties's executable “rails” conflicts with rails

问题

I have rails 4 and that's my default version (and I still wants it to be). but I d'like to add rails 3.2 on my computer. On the following command: gem install rails -v 3.2.16

I have this Warning:

railties's executable "rails" conflicts with rails
Overwrite the executable? [yN] 

I d'like to know if this will cause some bugs to my 4.0.1?

回答1:

You should use rvm and install rails 3 into a new gemset. Exactly do steps as follows:

1. Install rvm.

2. Install or use a ruby:

   rvm install ruby-2.0.0
   

3. Create a gemset, and then use it:

   rvm gemset create rails_1_app
   rvm gemset use rails_1_app
   

4. Install bunlder:

   gem install bundler
   

5. Create Gemfile, and specify rails 4 in it:

   gem 'rails', '~> 4.0'
   

6. Install requires gems:

   bundle install
   

7. Repeat steps 3-6 for a new gemset, but specifying rails 3 in it:

   gem 'rails', '~> 3.0'
   

来源：https://stackoverflow.com/questions/20899772/rails-4-railtiess-executable-rails-conflicts-with-rails