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I use Ruby 1.9.x syntax in my Rails 3 app, but after pushing it to Heroku it crashes due to older Ruby version (1.8). How can I control it?

Andrei
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  • You can now specify what version of ruby you wish to run on Cedar too: http://blog.heroku.com/archives/2012/5/9/multiple_ruby_version_support_on_heroku/ – Schneems Jun 11 '12 at 19:57

3 Answers3

34

Heroku's current stack, Cedar, uses 1.9.2 by default. Cedar also supports specifying the Ruby version in your Gemfile. Currently, 1.9.2 and 1.9.3 are valid options.

# Gemfile
source "https://rubygems.org"
ruby "1.9.3"
...

More details are available in the Ruby support article: https://devcenter.heroku.com/articles/ruby-support

If you are currently using Aspen or Bamboo, you can switch to 1.9.2 by using the stack:migrate command:

$ heroku stack:migrate bamboo-mri-1.9.2

You cannot automatically migrate to the Cedar stack at this time, but there is a guide on how to do so: https://devcenter.heroku.com/articles/cedar-migration

wuputah
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4

You can now explicitly specify a Ruby version on Heroku.

Simply setup your Gemfile as so

# Gemfile
source "https://rubygems.org"
ruby "1.9.3"

# Gems go here
mshafrir
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0

I wanted to use the version I already had defined in the .ruby-version file so I ended up creating a buildpack that can be used before heroku-buildpack-ruby that injects the version from the .ruby-version into the Gemfile. It also support versions without patch or aliases.

https://github.com/platanus/heroku-buildpack-ruby-version

This way you can have your version defined only in one place.

blackjid
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