HOw to fix bundler issue: You have already activated mysql 2.7, but your Gemfile requires mysql 2.8.1. Consider using bundle exec

After I deployed my rails 2.2.2 application to production I am getting this error: "You have already activated mysql 2.7, but your Gemfile requires mysql 2.8.1. Consider using bundle exec"

Gemfile has the correct information. How do I fix this issue?

Update I would li开发者_如何转开发ke to use gem 'mysql', '2.8.1' but somehow didn't work for me. Here is what I have in server gem list:

....
libxml-ruby (1.1.3)
memcache-client (1.6.3)
mysql (2.7)
net-scp (1.0.2)
net-sftp (2.0.2)
net-ssh (2.0.11)
....

Here is how my Gemfile look like:

require 'rubygems'
source 'http://rubygems.org'
source 'http://gemcutter.org'
source 'http://gems.github.com'
gem 'rails', '2.2.2'
gem 'hpricot', '0.6.0'
gem "composite_primary_keys", '2.2.0'
gem 'javan-whenever', '0.3.7'
gem 'mysql', '2.7' ** earlier I was trying with 2.8.1 then used 2.7 and it worked**
gem 'activerecord-oracle_enhanced-adapter', '1.1.9'
gem 'ruby-oci8', '1.0.3'
gem 'crypto', '0.0.3'
gem 'rack', '1.0.0'
gem 'mechanize', '1.0.0'

group :test do
  gem 'mocha', '0.9.5'
  gem 'rspec',             '1.3.1', :require => 'spec'
  gem 'rspec-rails',       '1.3.3'
end

group :cruise do
  gem 'metric_fu', '1.5.1'
end

Try to explicitly set mysql version in Gemfile: gem "mysql", "2.7"

Did you try to uninstall the 2.7 version and then install the 2.8 one? The reason I am asking is I've faced exactly the same error with another gem... Just yesterday in fact. I fixed this simply with these:

gem uninstall mysql -v 2.7
gem install mysql -v 2.8.1

I believe if you run the first command and then running bundle install, you will get the correct one. Or you may go back and change the version string in your Gemfile to the one you really want.