Is there a way to determine what version of Ruby is running from within Rails (either on the web or through script/console)? I have Ruby 1.8.6 installed but I've also installed Ruby Enterprise Edition 1.8.7-20090928 and want to ensure that it's using the right installation.
views:
508answers:
4
+3
A:
Try the constant RUBY_VERSION. I use this extensively to determine whether I'm running under 1.8 or JRuby.
Also, if you're not in production mode, you can do a quick check by hitting the URL "/rails/info/properties"
Mark Westling
2009-10-19 16:40:53
+10
A:
Use the Top-Level Constant
RUBY_VERSION
other useful Top-Level Constants are
RUBY_PATCHLEVEL
RUBY_PLATFORM
RUBY_RELEASE_DATE
here is an irb session:
irb(main):001:0> RUBY_VERSION
=> "1.8.7"
avguchenko
2009-10-19 16:41:54
+1
A:
In addition to the RUBY_VERSION constant and friends you may also want to check out Config::CONFIG. This hash contains not only the version numbers but also a ton of other useful runtime information, like the path to the binary, the hostname, ...
averell
2009-10-21 14:08:30