Лог после запуска seeds.rb

log.txt

vagrant@precise32:/vagrant/flashcards$ rake db:seed --trace
** Invoke db:seed (first_time)
** Execute db:seed
** Invoke db:abort_if_pending_migrations (first_time)
** Invoke environment (first_time)
** Execute environment
** Execute db:abort_if_pending_migrations
rake aborted!
NoMethodError: undefined method `css' for ["class", "column-1"]:Array
/vagrant/flashcards/db/seeds.rb:9:in `block in <top (required)>'
/usr/local/rvm/gems/ruby-2.1.1/gems/nokogiri-1.6.6.2/lib/nokogiri/xml/node.rb:331:in `block in each'
/usr/local/rvm/gems/ruby-2.1.1/gems/nokogiri-1.6.6.2/lib/nokogiri/xml/node.rb:330:in `each'
/usr/local/rvm/gems/ruby-2.1.1/gems/nokogiri-1.6.6.2/lib/nokogiri/xml/node.rb:330:in `each'
/vagrant/flashcards/db/seeds.rb:8:in `<top (required)>'
/usr/local/rvm/gems/ruby-2.1.1/gems/activesupport-4.1.0/lib/active_support/dependencies.rb:241:in `load'
/usr/local/rvm/gems/ruby-2.1.1/gems/activesupport-4.1.0/lib/active_support/dependencies.rb:241:in `block in l                               oad'
/usr/local/rvm/gems/ruby-2.1.1/gems/activesupport-4.1.0/lib/active_support/dependencies.rb:232:in `load_depen                               dency'
/usr/local/rvm/gems/ruby-2.1.1/gems/activesupport-4.1.0/lib/active_support/dependencies.rb:241:in `load'
/usr/local/rvm/gems/ruby-2.1.1/gems/railties-4.1.0/lib/rails/engine.rb:543:in `load_seed'
/usr/local/rvm/gems/ruby-2.1.1/gems/activerecord-4.1.0/lib/active_record/tasks/database_tasks.rb:184:in `load                               _seed'
/usr/local/rvm/gems/ruby-2.1.1/gems/activerecord-4.1.0/lib/active_record/railties/databases.rake:173:in `bloc                               k (2 levels) in <top (required)>'
/usr/local/rvm/gems/ruby-2.1.1/gems/rake-10.4.2/lib/rake/task.rb:240:in `call'
/usr/local/rvm/gems/ruby-2.1.1/gems/rake-10.4.2/lib/rake/task.rb:240:in `block in execute'
/usr/local/rvm/gems/ruby-2.1.1/gems/rake-10.4.2/lib/rake/task.rb:235:in `each'
/usr/local/rvm/gems/ruby-2.1.1/gems/rake-10.4.2/lib/rake/task.rb:235:in `execute'
/usr/local/rvm/gems/ruby-2.1.1/gems/rake-10.4.2/lib/rake/task.rb:179:in `block in invoke_with_call_chain'
/usr/local/rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/monitor.rb:211:in `mon_synchronize'
/usr/local/rvm/gems/ruby-2.1.1/gems/rake-10.4.2/lib/rake/task.rb:172:in `invoke_with_call_chain'
/usr/local/rvm/gems/ruby-2.1.1/gems/rake-10.4.2/lib/rake/task.rb:165:in `invoke'
/usr/local/rvm/gems/ruby-2.1.1/gems/rake-10.4.2/lib/rake/application.rb:150:in `invoke_task'
/usr/local/rvm/gems/ruby-2.1.1/gems/rake-10.4.2/lib/rake/application.rb:106:in `block (2 levels) in top_level                               '
/usr/local/rvm/gems/ruby-2.1.1/gems/rake-10.4.2/lib/rake/application.rb:106:in `each'
/usr/local/rvm/gems/ruby-2.1.1/gems/rake-10.4.2/lib/rake/application.rb:106:in `block in top_level'
/usr/local/rvm/gems/ruby-2.1.1/gems/rake-10.4.2/lib/rake/application.rb:115:in `run_with_threads'
/usr/local/rvm/gems/ruby-2.1.1/gems/rake-10.4.2/lib/rake/application.rb:100:in `top_level'
/usr/local/rvm/gems/ruby-2.1.1/gems/rake-10.4.2/lib/rake/application.rb:78:in `block in run'
/usr/local/rvm/gems/ruby-2.1.1/gems/rake-10.4.2/lib/rake/application.rb:176:in `standard_exception_handling'
/usr/local/rvm/gems/ruby-2.1.1/gems/rake-10.4.2/lib/rake/application.rb:75:in `run'
/usr/local/rvm/gems/ruby-2.1.1/gems/rake-10.4.2/bin/rake:33:in `<top (required)>'
/usr/local/rvm/gems/ruby-2.1.1/bin/rake:23:in `load'
/usr/local/rvm/gems/ruby-2.1.1/bin/rake:23:in `<main>'
Tasks: TOP => db:seed