How to uninstall datamapper (or any rubygem)

November 19th, 2008 • Uncategorized

gem list dm --no-version | xargs sudo gem uninstall -a -x
gem list data --no-version | xargs sudo gem uninstall -a -x
gem list do_ --no-version | xargs sudo gem uninstall -a -x

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3 Responses (Add Your Comment)

  1. Lukas Rieder November 20, 2008
    at 9:02 pm

    This is a nice one. Thank you.

    Recently I’ve had a lot of trouble with a gem which was installed in my ~/.gems and /usr/lib/ruby/1.8/gems.
    To get rid of this be aware of the sudo.


    # either do (for system wide gem installations)
    $ sudo gem uninstall

    # or do (for ~/.gems installations)
    $ gem uninstall
    # and you can just go to the directory and remove it

    Something I find very usefull when working with gems is:

    $ gem which ActiveRecord
    (checking gem activerecord-2.1.2 for ActiveRecord)
    /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.1.2/lib/ActiveRecord.rb

    Have fun!

  2. Martin Gamsjäger November 27, 2008
    at 4:53 am

    Hey Lukas,

    Thx for the hint about sudo reaching out for system wide installed gems only! It’s good to remember this should the need arise. Currently I don’t have any gems in my ~/.gems directory but I’m sure the time will come and then I (hopefully) will remember your words :-)

    Also, I didn’t know about the ‘gem which’ command! I already see me using this when dealing with both my MRI and REE ruby installs :-)

    Thx for your comments!

  3. jaigouk January 5, 2009
    at 5:43 pm

    thanks. It really helped me.

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