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I am trying to install RedMine on CentOS 6.2 but I am running into difficulties when I try to access the site. Using this guide, I have configured the following in environment.rb:

# Load the rails application
require File.expand_path('../application', __FILE__)

# Make sure there's no plugin in vendor/plugin before starting
vendor_plugins_dir = File.join(Rails.root, "vendor", "plugins")
if Dir.glob(File.join(vendor_plugins_dir, "*")).any?
  $stderr.puts "Plugins in vendor/plugins (#{vendor_plugins_dir}) are no longer allowed. " +
    "Please, put your Redmine plugins in the `plugins` directory at the root of your " +
    "Redmine directory (#{File.join(Rails.root, "plugins")})"
  exit 1

ENV['RAILS_ENV'] ||= 'production'

#RAILS_ENV=production bundle exec rake generate_session_store
RAILS_ENV=production bundle exec rake db:migrate

# Initialize the rails application

Unfortunately, I keep running into the following error:

undefined method 'db' for main:Object

I get the same problem when I try to run the command manually:

[root@nag0 config]# rake db:migrate --trace
(in /var/www/html/redmine-2.2.2)
** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
rake aborted!
undefined method `db' for main:Object
/usr/lib64/ruby/gems/1.8/gems/railties-3.2.11/lib/rails/application.rb:103:in `require'
/usr/lib64/ruby/gems/1.8/gems/railties-3.2.11/lib/rails/application.rb:103:in `require_environment!'
/usr/lib64/ruby/gems/1.8/gems/railties-3.2.11/lib/rails/application.rb:297:in `initialize_tasks'
/usr/lib64/ruby/gems/1.8/gems/rake-10.0.3/lib/rake/task.rb:228:in `call'
/usr/lib64/ruby/gems/1.8/gems/rake-10.0.3/lib/rake/task.rb:228:in `execute'
/usr/lib64/ruby/gems/1.8/gems/rake-10.0.3/lib/rake/task.rb:223:in `each'
/usr/lib64/ruby/gems/1.8/gems/rake-10.0.3/lib/rake/task.rb:223:in `execute'
/usr/lib64/ruby/gems/1.8/gems/rake-10.0.3/lib/rake/task.rb:166:in `invoke_with_call_chain'
/usr/lib/ruby/1.8/monitor.rb:242:in `synchronize'
/usr/lib64/ruby/gems/1.8/gems/rake-10.0.3/lib/rake/task.rb:159:in `invoke_with_call_chain'
/usr/lib64/ruby/gems/1.8/gems/rake-10.0.3/lib/rake/task.rb:187:in `invoke_prerequisites'
/usr/lib64/ruby/gems/1.8/gems/rake-10.0.3/lib/rake/task.rb:185:in `each'
/usr/lib64/ruby/gems/1.8/gems/rake-10.0.3/lib/rake/task.rb:185:in `invoke_prerequisites'
/usr/lib64/ruby/gems/1.8/gems/rake-10.0.3/lib/rake/task.rb:165:in `invoke_with_call_chain'
/usr/lib/ruby/1.8/monitor.rb:242:in `synchronize'
/usr/lib64/ruby/gems/1.8/gems/rake-10.0.3/lib/rake/task.rb:159:in `invoke_with_call_chain'
/usr/lib64/ruby/gems/1.8/gems/rake-10.0.3/lib/rake/task.rb:152:in `invoke'
/usr/lib64/ruby/gems/1.8/gems/rake-10.0.3/lib/rake/application.rb:143:in `invoke_task'
/usr/lib64/ruby/gems/1.8/gems/rake-10.0.3/lib/rake/application.rb:101:in `top_level'
/usr/lib64/ruby/gems/1.8/gems/rake-10.0.3/lib/rake/application.rb:101:in `each'
/usr/lib64/ruby/gems/1.8/gems/rake-10.0.3/lib/rake/application.rb:101:in `top_level'
/usr/lib64/ruby/gems/1.8/gems/rake-10.0.3/lib/rake/application.rb:110:in `run_with_threads'
/usr/lib64/ruby/gems/1.8/gems/rake-10.0.3/lib/rake/application.rb:95:in `top_level'
/usr/lib64/ruby/gems/1.8/gems/rake-10.0.3/lib/rake/application.rb:73:in `run'
/usr/lib64/ruby/gems/1.8/gems/rake-10.0.3/lib/rake/application.rb:160:in `standard_exception_handling'
/usr/lib64/ruby/gems/1.8/gems/rake-10.0.3/lib/rake/application.rb:70:in `run'
/usr/bin/rake:19:in `load'
Tasks: TOP => db:migrate => environment

I have configured the database.yml file with my MySQL database login/password.

Given that I am new to Ruby in general, I am sure that I am doing something wrong, but unfortunately I do not know enough about how Ruby works to troubleshoot much further.

Any suggestions are always appreciated.

share|improve this question
Did you run bundle install? – Michael Hampton Feb 13 '13 at 23:37
Yep, I did. Your bundle is complete! Use bundle show [gemname]` to see where a bundled gem is installed` – tacos_tacos_tacos Feb 13 '13 at 23:39
up vote 1 down vote accepted

Can you confirm that you've configured config/database.yml rather than config/db.yml? If not, you've named your database configuration file incorrectly.

You've also misread the guide. Under the section Generate the session store, commands to execute are listed - not additions to environment.rb.

Remove the lines

#RAILS_ENV=production bundle exec rake generate_session_store
RAILS_ENV=production bundle exec rake db:migrate

from your environment.rb and proceed with the guide by executing the commands in the Generate the session store at the command line instead.

share|improve this answer
I mis-typed, the database.yml file was named correctly. But, after removing those lines and running update_rubygems, those commands worked! – tacos_tacos_tacos Feb 13 '13 at 23:53

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