Install mysql2 -v '0.3.19' via bundle (Gemfile) on rails - mysql

Question

I have an error while trying to 'bundle install' when listing 'mysql2' on the Gemfile on OSX Lion. I'm currenly building an app with Rails. If I run 'bundle install', it hangs forever. First I tried to fix the issue by modifying the gem file to 'gem 'mysql2', :git => 'git://github.com/sodabrew/mysql2.git', :ref => 'a2800f'', as suggested here: https://github.com/brianmario/mysql2/pull/654. The infinite loop got fixed, I ran 'bundle install' sucessfully but when I run 'rake db:create', I got this error:
rake aborted!
LoadError: dlopen(/Users/macbook/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/bundler/gems/mysql2-a2800f86754b/lib/mysql2/mysql2.bundle, 9): Library not loaded: /usr/local/lib/libmysqlclient.18.dylib
Referenced from: /Users/macbook/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/bundler/gems/mysql2-a2800f86754b/lib/mysql2/mysql2.bundle
Reason: image not found - /Users/macbook/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/bundler/gems/mysql2-a2800f86754b/lib/mysql2/mysql2.bundle
/Users/macbook/Desktop/tutorial/billingleap2/moviestore/config/application.rb:7:in `<top (required)>'
/Users/macbook/Desktop/tutorial/billingleap2/moviestore/Rakefile:4:in `<top (required)>'
I also try to 'brew install mysql' and it worked, but then on 'rake db:create', I got this error:
#<Mysql2::Error: Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)>
Couldn't create database for {"adapter"=>"mysql2", "encoding"=>"utf8", "pool"=>5, "username"=>"root", "password"=>nil, "host"=>"localhost", "database"=>"moviestore_development"}, {:charset=>"utf8", :collation=>"utf8_unicode_ci"}
(If you set the charset manually, make sure you have a matching collation)
#<Mysql2::Error: Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)>
Couldn't create database for {"adapter"=>"mysql2", "encoding"=>"utf8","pool"=>5, "username"=>"root", "password"=>nil, "host"=>"localhost", "database"=>"moviestore_test"}, {:charset=>"utf8", :collation=>"utf8_unicode_ci"}
(If you set the charset manually, make sure you have a matching collation)
So then I 'brew uninstall mysql' and that problem was gone, but now I have the first one.
Trying 'gem install mysql2 -v '0.3.19'' also hangs.
What could be the problem?

Answer 1

As you are using bundler, you have to fix the first issue (why bundle install is failing) and install the mysql2 gem using bundler. There must have some gem dependency issue that you need to look at.
And, you should run: bundle exec rake db:migrate as you are using bundler and Gemfile etc. that will ensure your rake task runs in the context of the current project.
Update: 1
If you already ran: bundle install successfully and installed the mysql2 gem successfully, then try running:
`bundle exec rake db:create`
If this causes you the specified error (which means your libmysqlclient library is not loading for some reason):
rake aborted!
LoadError: dlopen(/Users/macbook/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/bundler/gems/mysql2-a2800f86754b/lib/mysql2/mysql2.bundle, 9): Library not loaded: /usr/local/lib/libmysqlclient.18.dylib
Referenced from: /Users/macbook/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/bundler/gems/mysql2-a2800f86754b/lib/mysql2/mysql2.bundle
Reason: image not found - /Users/macbook/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/bundler/gems/mysql2-a2800f86754b/lib/mysql2/mysql2.bundle
/Users/macbook/Desktop/tutorial/billingleap2/moviestore/config/application.rb:7:in `<top (required)>'
/Users/macbook/Desktop/tutorial/billingleap2/moviestore/Rakefile:4:in `<top (required)>'
then you should look at this answer and this one too which have some prescribed solutions for similar issue. Try those see if that works.
Update: 2
So, mysql gem has some development dependencies which needs to be installed in your system before you can actually use mysql. Do the following:
sudo gem install mysql-server mysql-client
sudo gem install libmysql-ruby libmysqlclient-dev
sudo gem install mysql
And, then try again:
bundle install
Update: 3
First, to find your socket file:
mysqladmin variables | grep socket
It will give you something like this:
| socket | /tmp/mysql.sock
Then, add a line to your config/database.yml:
development:
adapter: mysql2
host: localhost
username: root
password: xxxx
database: xxxx
socket: /tmp/mysql.sock