Ruby-on-rails – Rails, Ruby 1.9.3p0, and thesql gem

rubyruby-on-railsruby-on-rails-3ruby-on-rails-3.1rubygems

I'm running CentOS6 and installed Ruby from source, along with Rails and some other staff. 

ruby -v
ruby 1.9.3p0 (2011-10-30 revision 33570) [x86_64-linux]  

rails -v
Rails 3.1.3

Some gems: 

*** LOCAL GEMS ***

actionmailer (3.1.3, 2.3.14)
actionpack (3.1.3, 2.3.14)
activemodel (3.1.3)
activerecord (3.1.3, 2.3.14)
activeresource (3.1.3, 2.3.14)
activesupport (3.1.3, 2.3.14)
archive-tar-minitar (0.5.2)
arel (2.2.1)
bigdecimal (1.1.0)
bouncy-castle-java (1.5.0146.1)
builder (3.0.0)
bundler (1.0.21)
coderay (0.9.7)
columnize (0.3.5)
edavis10-object_daddy (0.4.3)
erubis (2.7.0)
fastercsv (1.5.0)
ffi (1.0.11)
hike (1.2.1)
hoe (2.12.4)
i18n (0.6.0, 0.4.2)
io-console (0.3)
jruby-openssl (0.7.4)
json (1.5.4)
linecache19 (0.5.13)
mail (2.3.0)
metaclass (0.0.1)
mime-types (1.17.2)
minitest (2.5.1)
mocha (0.10.0)
multi_json (1.0.4)
mysql (2.8.1)
mysql2 (0.3.11, 0.2.7)
net-ldap (0.2.2)
polyglot (0.3.3)
rack (1.3.5, 1.1.2)
rack-cache (1.1)
rack-mount (0.8.3)
rack-ssl (1.3.2)
rack-test (0.6.1)
rails (3.1.3, 2.3.14)
railties (3.1.3)
rake (0.9.2.2)
rdoc (3.9.4)
rmagick (2.13.1)
ruby-debug-base19 (0.11.26, 0.11.25)
ruby-debug19 (0.11.6)
ruby-mysql (2.9.4)
ruby-openid (2.1.4)
ruby_core_source (0.1.5)
rubygems-update (1.8.12)
rubytree (0.5.2)
shoulda (2.11.3, 2.10.3)
sprockets (2.0.3)
sqlite3 (1.3.5, 0.1.1)
sqlite3-ruby (1.3.3, 1.2.5)
thor (0.14.6)
tilt (1.3.3)
treetop (1.4.10)
tzinfo (0.3.31)

I need Rails in order to run chiliproject, but when running the following command 

RAILS_ENV=production bundle exec rake db:migrate

I get:

!!! The bundled mysql.rb driver has been removed from Rails 2.2. Please install the mysql gem and try again: gem install mysql.
rake aborted!
cannot load such file -- mysql

Tasks: TOP => db:migrate => environment
(See full trace by running task with --trace)

Now with --trace:

RAILS_ENV=production bundle exec rake db:migrate --trace >> tmp/rake
** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
!!! The bundled mysql.rb driver has been removed from Rails 2.2. Please install the mysql gem and try again: gem install mysql.
rake aborted!
cannot load such file -- mysql
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:184:in `require'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:184:in `require'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/core_ext/kernel/requires.rb:7:in `block in require_library_or_gem'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/core_ext/kernel/reporting.rb:11:in `silence_warnings'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/core_ext/kernel/requires.rb:5:in `require_library_or_gem'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/connection_adapters/mysql_adapter.rb:61:in `mysql_connection'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/connection_adapters/abstract/connection_pool.rb:223:in `new_connection'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/connection_adapters/abstract/connection_pool.rb:245:in `checkout_new_connection'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/connection_adapters/abstract/connection_pool.rb:188:in `block (2 levels) in checkout'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/connection_adapters/abstract/connection_pool.rb:184:in `loop'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/connection_adapters/abstract/connection_pool.rb:184:in `block in checkout'
/usr/local/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/connection_adapters/abstract/connection_pool.rb:183:in `checkout'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/connection_adapters/abstract/connection_pool.rb:98:in `connection'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/connection_adapters/abstract/connection_pool.rb:326:in `retrieve_connection'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/connection_adapters/abstract/connection_specification.rb:123:in `retrieve_connection'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/connection_adapters/abstract/connection_specification.rb:115:in `connection'
/var/www/html/chiliproject/vendor/plugins/awesome_nested_set/lib/awesome_nested_set.rb:218:in `quoted_left_column_name'
/var/www/html/chiliproject/vendor/plugins/awesome_nested_set/lib/awesome_nested_set.rb:94:in `acts_as_nested_set'
/var/www/html/chiliproject/app/models/issue.rb:33:in `'
/var/www/html/chiliproject/app/models/issue.rb:15:in `'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:184:in `require'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:184:in `require'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:291:in `require_or_load'
/var/www/html/chiliproject/vendor/plugins/engines/lib/engines/rails_extensions/dependencies.rb:133:in `require_or_load_with_engine_additions'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:451:in `load_missing_constant'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:106:in `const_missing_with_dependencies'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:118:in `const_missing'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/inflector.rb:375:in `const_get'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/inflector.rb:375:in `block in constantize'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/inflector.rb:374:in `each'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/inflector.rb:374:in `constantize'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/core_ext/string/inflections.rb:162:in `constantize'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/observer.rb:157:in `observed_class'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/observer.rb:183:in `observed_classes'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/observer.rb:166:in `initialize'
/usr/local/lib/ruby/1.9.1/singleton.rb:141:in `new'
/usr/local/lib/ruby/1.9.1/singleton.rb:141:in `block in instance'
:10:in `synchronize'
/usr/local/lib/ruby/1.9.1/singleton.rb:139:in `instance'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/observer.rb:38:in `block in instantiate_observers'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/observer.rb:36:in `each'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/observer.rb:36:in `instantiate_observers'
/usr/local/lib/ruby/gems/1.9.1/gems/actionpack-2.3.14/lib/action_controller/dispatcher.rb:15:in `block in define_dispatcher_callbacks'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/callbacks.rb:182:in `call'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/callbacks.rb:182:in `evaluate_method'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/callbacks.rb:166:in `call'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/callbacks.rb:90:in `block in run'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/callbacks.rb:90:in `each'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/callbacks.rb:90:in `run'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/callbacks.rb:276:in `run_callbacks'
/usr/local/lib/ruby/gems/1.9.1/gems/actionpack-2.3.14/lib/action_controller/dispatcher.rb:51:in `run_prepare_callbacks'
/usr/local/lib/ruby/gems/1.9.1/gems/rails-2.3.14/lib/initializer.rb:631:in `prepare_dispatcher'
/usr/local/lib/ruby/gems/1.9.1/gems/rails-2.3.14/lib/initializer.rb:185:in `process'
/usr/local/lib/ruby/gems/1.9.1/gems/rails-2.3.14/lib/initializer.rb:113:in `run'
/var/www/html/chiliproject/config/environment.rb:39:in `'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:182:in `require'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:182:in `block in require'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:547:in `new_constants_in'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:182:in `require'
/usr/local/lib/ruby/gems/1.9.1/gems/rails-2.3.14/lib/tasks/misc.rake:4:in `block in '
/usr/local/lib/ruby/1.9.1/rake/task.rb:205:in `call'
/usr/local/lib/ruby/1.9.1/rake/task.rb:205:in `block in execute'
/usr/local/lib/ruby/1.9.1/rake/task.rb:200:in `each'
/usr/local/lib/ruby/1.9.1/rake/task.rb:200:in `execute'
/usr/local/lib/ruby/1.9.1/rake/task.rb:158:in `block in invoke_with_call_chain'
/usr/local/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'
/usr/local/lib/ruby/1.9.1/rake/task.rb:151:in `invoke_with_call_chain'
/usr/local/lib/ruby/1.9.1/rake/task.rb:176:in `block in invoke_prerequisites'
/usr/local/lib/ruby/1.9.1/rake/task.rb:174:in `each'
/usr/local/lib/ruby/1.9.1/rake/task.rb:174:in `invoke_prerequisites'
/usr/local/lib/ruby/1.9.1/rake/task.rb:157:in `block in invoke_with_call_chain'
/usr/local/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'
/usr/local/lib/ruby/1.9.1/rake/task.rb:151:in `invoke_with_call_chain'
/usr/local/lib/ruby/1.9.1/rake/task.rb:144:in `invoke'
/usr/local/lib/ruby/1.9.1/rake/application.rb:116:in `invoke_task'
/usr/local/lib/ruby/1.9.1/rake/application.rb:94:in `block (2 levels) in top_level'
/usr/local/lib/ruby/1.9.1/rake/application.rb:94:in `each'
/usr/local/lib/ruby/1.9.1/rake/application.rb:94:in `block in top_level'
/usr/local/lib/ruby/1.9.1/rake/application.rb:133:in `standard_exception_handling'
/usr/local/lib/ruby/1.9.1/rake/application.rb:88:in `top_level'
/usr/local/lib/ruby/1.9.1/rake/application.rb:66:in `block in run'
/usr/local/lib/ruby/1.9.1/rake/application.rb:133:in `standard_exception_handling'
/usr/local/lib/ruby/1.9.1/rake/application.rb:63:in `run'
/usr/local/bin/rake:32:in `'
Tasks: TOP => db:migrate => environment

Does anyone knows what's wrong with mysql gem files?

I also tried to install mysql gem files like this

gem install ruby-mysql2 --no-rdoc --no-ri -- --with-mysql-config=/usr/bin/mysql_config

Best Answer

I was just having similar problems and you may be doing what I was: I was using 'gem list' to determine what was installed (it lists *** LOCAL GEMS *** just like you show) and I saw mysql, but the Gemfile for my project was not requiring bundler to install mysql.

If you just type bundle show does it list 'mysql'? If not, then the Gemfile in chiliproject is not causing bundler to install mysql. I found this all very confusing until I realized I was confusing different ways of managing what gems are installed.

If you or others who comes this way are having the same issue, then perhaps this is helpful. (And perhaps this poor explanation will encourage one of the rails gurus to elaborate for us.)

To say it another way, the list of your locally installed gems, isn't the same as the list installed in your app's bundle of gems (hence where the name of the bundler tool comes from). When you're running your app, and managing its dependencies with bundler you have to do everything within the bundler scope, in order to make sure it all works together. When you do that it's actually very straight forward and solves a lot of problems for you, but if you're coming from previous experience on apps that didn't use bundler then it just takes a little getting used to.

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