rbenv Your Ruby version is 2.0.0, but your Gemfile specified 2.1.2

Question

I'm using rbenv and I have the follow error when I execute rails s

Your Ruby version is 2.0.0, but your Gemfile specified 2.1.2

I was reading this thread: Mavericks, RBENV, Your Ruby version is 2.0.0, but your Gemfile specified 2.1.1

But the error persist.

rails -v
Your Ruby version is 2.0.0, but your Gemfile specified 2.1.2

and the commands

sudo gem install bundler 
rbenv rehash

$ which ruby /usr/bin/ruby

$ bundle exec which ruby Your Ruby version is 2.0.0, but your Gemfile specified 2.1.2

doenst solve the problem. I'm doing something wrong?

Answer 1

What version of ruby are you using?

ruby -v

It sounds like the Gemfile has a ruby requirement listed for 2.1.2. You may need to install that version:

rbenv install 2.1.2

Then you may need to tell rbenv to use that version for that project:

rbenv local 2.1.2

It looks like the rbenv team/community decided against adding support for ruby versions specified in the Gemfile. Reference: https://github.com/sstephenson/rbenv/issues/223

Answer 2

If you get this in a Rails project, and you recently upgraded your ruby version you might have spring running with the old version of ruby. ./bin/spring stop will fix this.

Answer 3

If it's macOS, and your new Ruby is from homebrew, try sudo gem bundler