How do you check the Gem Version in Ruby at Runtime?

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)

Anyt开发者_运维百科hing like that exist?

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puts Gem.loaded_specs["activesupport"].version

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careful when comparing against Gem.loaded_specs['mini_magick'].version as it's not a String but a Gem::Version object !

the version string is accessible using Gem.loaded_specs['mini_magick'].version.version which is ugly and might not work as expected e.g. '2.2' > '2.10' !

the correct way to compare against a gem version is :

Gem.loaded_specs['mini_magick'].version < Gem::Version.create('2.0')