在这台机器上可用的宝石中找不到宝石'jquery-rails（= 2.0.0）ruby'

Question

So in the GemFile if I leave it as gem 'query-rails' and install the bundle, it works. But if I specify the version like this:

gem 'jquery-rails', '2.0.0'

and want to install or update the bundle, it doesn't work and shows the error in the title.

I also did a

sudo gem install jquery-rails

and tried again to give a version to jQuery but still didn't work.

Why?!

Answer 1

There is no v2.0.0 jquery-rails gem available - it was yanked . You should try using 2.0.1 or later. Generally, it's better to specify the '~>' helper to get the latest bug fixes for that minor version:

gem 'jquery-rails', '~> 2.0.0'

This will install v2.0.3 which is the latest of the 2.0.x series. Read What does tilde-greater-than (~>) mean in Ruby gem dependencies? and http://semver.org/ for more info on this.