Mysql + ruby on rails + linux mint = not working
I am using Linux Mint and I have just started learning Ruby on Rails. I have been following Lynda.com tutorials and I am getting hung up on mysql setup. I've tried everything people asked before and I can't seem to find a solution. Let me explain. I installed everything correctly.
matth@MatijaComp ~ $ ruby -v
ruby 2.2.2p95 (2015-04-13 revision 50295) [x86_64-linux]
matth@MatijaComp ~ $ rails -v
Rails 4.2.3
matth@MatijaComp ~ $ mysql --version
mysql Ver 14.14 Distrib 5.5.44, for debian-linux-gnu (x86_64) using readline 6.3
when i start the project with "-d mysql", start my mysql server, run "rake db: create", set up the database.yml file to fill in the password and then just execute "rails server". I hope I've explained all my steps, maybe I forgot something, but I think I've tried everything. Setting a password is not a problem. (without mysql server rails works fine)
[2015-07-25 02:58:46] INFO WEBrick 1.3.1
[2015-07-25 02:58:46] INFO ruby 2.2.2 (2015-04-13) [x86_64-linux]
[2015-07-25 02:58:46] INFO WEBrick::HTTPServer#start: pid=11689 port=3000
Started GET "/" for 127.0.0.1 at 2015-07-25 02:58:48 +0200
Gem::LoadError (Specified 'mysql2' for database adapter, but the gem is not loaded. Add `gem 'mysql2'` to your Gemfile (and ensure its version is at the minimum required by ActiveRecord).):
activerecord (4.2.3) lib/active_record/connection_adapters/connection_specification.rb:177:in `rescue in spec'
activerecord (4.2.3) lib/active_record/connection_adapters/connection_specification.rb:174:in `spec'
activerecord (4.2.3) lib/active_record/connection_handling.rb:50:in `establish_connection'
activerecord (4.2.3) lib/active_record/railtie.rb:120:in `block (2 levels) in <class:Railtie>'
activesupport (4.2.3) lib/active_support/lazy_load_hooks.rb:38:in `instance_eval'
activesupport (4.2.3) lib/active_support/lazy_load_hooks.rb:38:in `execute_hook'
activesupport (4.2.3) lib/active_support/lazy_load_hooks.rb:45:in `block in run_load_hooks'
activesupport (4.2.3) lib/active_support/lazy_load_hooks.rb:44:in `each'
activesupport (4.2.3) lib/active_support/lazy_load_hooks.rb:44:in `run_load_hooks'
activerecord (4.2.3) lib/active_record/base.rb:315:in `<module:ActiveRecord>'
activerecord (4.2.3) lib/active_record/base.rb:26:in `<top (required)>'
activerecord (4.2.3) lib/active_record/migration.rb:383:in `connection'
activerecord (4.2.3) lib/active_record/migration.rb:370:in `call'
actionpack (4.2.3) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
activesupport (4.2.3) lib/active_support/callbacks.rb:84:in `run_callbacks'
actionpack (4.2.3) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
actionpack (4.2.3) lib/action_dispatch/middleware/reloader.rb:73:in `call'
actionpack (4.2.3) lib/action_dispatch/middleware/remote_ip.rb:78:in `call'
actionpack (4.2.3) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call'
web-console (2.2.1) lib/web_console/middleware.rb:39:in `call'
actionpack (4.2.3) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
railties (4.2.3) lib/rails/rack/logger.rb:38:in `call_app'
railties (4.2.3) lib/rails/rack/logger.rb:20:in `block in call'
activesupport (4.2.3) lib/active_support/tagged_logging.rb:68:in `block in tagged'
activesupport (4.2.3) lib/active_support/tagged_logging.rb:26:in `tagged'
activesupport (4.2.3) lib/active_support/tagged_logging.rb:68:in `tagged'
railties (4.2.3) lib/rails/rack/logger.rb:20:in `call'
actionpack (4.2.3) lib/action_dispatch/middleware/request_id.rb:21:in `call'
rack (1.6.4) lib/rack/methodoverride.rb:22:in `call'
rack (1.6.4) lib/rack/runtime.rb:18:in `call'
activesupport (4.2.3) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
rack (1.6.4) lib/rack/lock.rb:17:in `call'
actionpack (4.2.3) lib/action_dispatch/middleware/static.rb:116:in `call'
rack (1.6.4) lib/rack/sendfile.rb:113:in `call'
railties (4.2.3) lib/rails/engine.rb:518:in `call'
railties (4.2.3) lib/rails/application.rb:165:in `call'
rack (1.6.4) lib/rack/lock.rb:17:in `call'
rack (1.6.4) lib/rack/content_length.rb:15:in `call'
rack (1.6.4) lib/rack/handler/webrick.rb:88:in `service'
/usr/share/rvm/rubies/ruby-2.2.2/lib/ruby/2.2.0/webrick/httpserver.rb:138:in `service'
/usr/share/rvm/rubies/ruby-2.2.2/lib/ruby/2.2.0/webrick/httpserver.rb:94:in `run'
/usr/share/rvm/rubies/ruby-2.2.2/lib/ruby/2.2.0/webrick/server.rb:294:in `block in start_thread'
It always shows this error no matter what I try. Even if I remove the gems for mysql, comment out the database in the database.yml file, it still doesn't want to work. Thank!
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Try running first bundle exec rails s
and see if it gives a different result. If it complains that you are not running the package, run it first bundle install
. A Gem::LoadError
usually means a problem with your Gemfile, and sometimes - for example, if you installed Ruby via a system package manager or installer - the binary rails
will be linked to your system gems, not your projects.The c prefix commands bundle exec
will ensure they run in the context of the current Gemfile.
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