Installed Ruby version are different in macOS and Bundle

Question

I'm not using RVM but brew to install and update Ruby and Gem version up-to-date. But when I was trying bundle install , I got an error showed that the Ruby version requirement does not conform.

I added ruby '2.1.9' to the Gemfile and did some check:

(●—●) ↪ bundle platform                                                                                
Your platform is: universal.x86_64-darwin16

Your app has gems that work on these platforms:
* ruby

Your Gemfile specifies a Ruby version requirement:
* ruby 2.1.9

Your Ruby version is 2.0.0, but your Gemfile specified 2.1.9
(●—●) ↪ ruby -v                                                                                         
ruby 2.4.0p0 (2016-12-24 revision 57164) [x86_64-darwin16]
(●—●) ↪ gem -v                                                                                         
2.6.11

I found that there is a lower version Ruby in my project.

/Users/veck/Desktop/Project/vendor/bundle/ruby/2.0.0

How do I fix this problem?

Answer 1

I found that I successfully did bundle install with following action:

gem install bundler

After this installation, my vendor/bundle/ruby has one more version 2.4.0 . Then I retry bundle install and all works fine.

Note : But 2.0.0 version of ruby still stay in vendor/bundle.