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Andrew Pope
Andrew Pope
11,915 Points

*RESOLVED* MySQL Error (gem install) with Rails

Hi everyone,

I am currently following along with Hampton's course on ActiveRecord Basics. In the Migrations video in Stage 2, the project is created using

rails new biller -d mysql

However, when I try I get an error when it tries to install mysql with gem install.

Here is my console output

Errno::EACCES: Permission denied @ rb_sysopen - /Users/andrew/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/mysql2-0.3.16/MIT-LICENSE
An error occurred while installing mysql2 (0.3.16), and Bundler cannot continue.
Make sure that `gem install mysql2 -v '0.3.16'` succeeds before bundling.
         run  bundle exec spring binstub --all
/Users/andrew/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/bundler-1.6.2/lib/bundler/resolver.rb:352:in `resolve': Could not find gem 'mysql2 (>= 0) ruby' in the gems available on this machine. (Bundler::GemNotFound)
    from /Users/andrew/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/bundler-1.6.2/lib/bundler/resolver.rb:165:in `start'
    from /Users/andrew/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/bundler-1.6.2/lib/bundler/resolver.rb:129:in `resolve'
    from /Users/andrew/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/bundler-1.6.2/lib/bundler/definition.rb:203:in `resolve'
    from /Users/andrew/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/bundler-1.6.2/lib/bundler/definition.rb:133:in `specs'
    from /Users/andrew/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/bundler-1.6.2/lib/bundler/definition.rb:178:in `specs_for'
    from /Users/andrew/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/bundler-1.6.2/lib/bundler/definition.rb:167:in `requested_specs'
    from /Users/andrew/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/bundler-1.6.2/lib/bundler/environment.rb:18:in `requested_specs'
    from /Users/andrew/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/bundler-1.6.2/lib/bundler/runtime.rb:13:in `setup'
    from /Users/andrew/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/bundler-1.6.2/lib/bundler.rb:120:in `setup'
    from /Users/andrew/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/bundler-1.6.2/lib/bundler/setup.rb:17:in `<top (required)>'
    from /Users/andrew/.rbenv/versions/2.1.2/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /Users/andrew/.rbenv/versions/2.1.2/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'

I already have mysql installed as part of MAMP, however the server is not running (neither httpd or mysql).

Any ideas why the command won't complete would be greatly appreciated!

Thanks in advance,


7 Answers

Andrew Pope
Andrew Pope
11,915 Points

Sorry, all is fixed now!

For anyone experiencing the same, or a similar error here is what I did:

If you haven't installed homebrew, then install it!

Ensure the latest version of mysql is installed to your machine

brew install mysql

if you don't have mysql installed, or alternatively

brew upgrade mysql

to update to the latest version.

then run

sudo gem install mysql2

and finally, create the rails project

rails new biller -d mysql

Hope this helps somebody!


Cavan Biggs
Cavan Biggs
25,212 Points

Great work, thanks for the help.

Cavan Biggs
Cavan Biggs
25,212 Points

Also if anyone gets a "brew:command not found" this link will help you get through that http://techsharehub.blogspot.com/2013/08/brew-command-not-found.html

What if you're not using a mac?

Holly Banning
Holly Banning
16,096 Points

Yes, is there an equivalent for windows users?

Well, I sort of resolved the issue. I tried various fixes, but nothing worked. So, finally, I opted for working within a virtual workspace. Don't know why I didn't think of this earlier. Take Windows out of the equation, and no more conflict.

Windows users: Disable your antivirus. Wait let me say it again for those of you who don't believe me. DISABLE YOUR ANTIVIRUS. Make sure it's disabled while attempting to install mysql2.

I'm still having this issue. Can't figure out what it is.

Jaime Young
Jaime Young
8,110 Points

Hi I installed the mysql2 gem properly but when I input rake db:create, it still creates an error.

/Users/JaimeYoung/.rvm/gems/ruby-2.2.0@global/gems/activesupport-4.0.2/lib/active_support/values/time_zone.rb:282: warning: circular argument reference - now Access denied for user 'root'@'localhost' (using password: NO)Please provide the root password for your mysql installation

^ i type in my root password and it still rejects me