I prefer keeping ruby version in Gemfile even when I do not use Heroku On Tuesday, March 1, 2016 at 2:32:18 PM UTC+3, krfg wrote: > > The Ruby on Rails Tutorial > <https://www.railstutorial.org/book/frontmatter> by Michael Hartl uses a > Gemfile without specifying a Ruby version: the ruby keyword is missing in > all the applications. > > When I deploy to Heroku I receive the following warning: > > > remote: ###### WARNING: > remote: You have not declared a Ruby version in your Gemfile. > remote: To set your Ruby version add this line to your Gemfile: > remote: ruby '2.2.4' > remote: # See https://devcenter.heroku.com/articles/ruby-versions for > more information. > > The tutorial says > <https://www.railstutorial.org/book/sign_up#sec-ruby_version_number> that > "*the costs associated with including such an explicit Ruby version > number outweigh the (negligible) benefits, so you should ignore this > warning for now. The main issue is that keeping your sample app and system > in sync with the latest Ruby version can be a huge inconvenience*". > > > I am wondering what is better (if I can choose), between using the same > Ruby version at Heroku and specifying any Ruby version it suits me. Since I > am using Ruby 2.2.1p85 for my application, adding ruby "2.2.1", > :patchlevel => "85" would work and make Heroku adjust to this version or > rather I am supposed to adjust to Heroku and add as suggested ruby '2.2.4'? > Can I leave out the Ruby version with no worries? > > > I am using rvm and a specific gemset with a specific Ruby version, for no > other reason than trying to use an environment as much close to the > tutorial as possible. > > How can I decide what Ruby version and what version of the gems in the > Gemfile are suitable for my application? >
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