How to specify Gemfile so that it won't install a specific version of a gem

Question

I'm new to ruby, and I'm trying to specify a specific version number to rack. I want 1.4.5 installed and 1.5.2 removed, and I did gem uninstall rack --version 1.5.2, and specified the version number of rack to 1.4.5 in file Gemfile.lock.

But after I got up this morning I found that rack 1.5.2 was automatically installed back again, and the version of rack in Gemfile.lock was reset to 1.5.2. How can I specify a configuration so the machine doesn't automatically do the things above?

You should use `Gemfile`, not `Gemfile.lock` for this purpose. You should never edit `Gemfile.lock` by hand. — Marek Lipka, Apr 02 '14 at 08:01

score 5 · Accepted Answer · answered Apr 02 '14 at 08:01

5

Dont edit the Gemfile.lock, write this in the Gemfile:

gem 'rack', '1.4.5'

If you have some warning or error message, type bundle update rack

Notice: Basically Gemfile.lock is the result of the Gemfile bundle

answered Apr 02 '14 at 08:01

apneadiving

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How to specify Gemfile so that it won't install a specific version of a gem

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