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Is it possible to check the gem version of the currently loaded gem in a ruby/rails app?
During debugging, I would like to be able to do something like:
puts RubyGem.loaded_version(:active_support) Anything like that exist?
566
Since your goal is to verify a gem is installed with the correct version, use gem list . You can limit to the specific gem by using gem list data_mapper . To verify that it's installed and working, you'll have to try to require the gem and then use it in your code.
The Gem command is included with Ruby 1.9+ now, and is a standard addition to Ruby pre-1.9. Because local_gems relies on group_by , it returns a hash of the gems, where the key is the gem's name, and the value is an array of the gem specifications.
There are several ways to specify gem versions: Use a specific version: gem "name-of-gem", "1.0" . You can find specific versions on Rubygems.org (provided that's the source you”re using) by searching for your gem and looking at the “Versions” listed. Use a version operator: gem "name-of-gem", ">1.0" .
puts Gem.loaded_specs["activesupport"].version If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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