NoMethodError in Admin/generalController#update_database

You have a nil object when you didn't expect it!
You might have expected an instance of Array.
The error occurred while evaluating nil.collect

RAILS_ROOT: ../config/..
Application Trace | Framework Trace | Full Trace

/home/specinti/typo41/app/controllers/admin/general_controller.rb:18:in `update_database'

#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/base.rb:1097:in `perform_action_without_filters'
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:723:in `call_filters'
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:680:in `perform_action_without_benchmark'
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/benchmarking.rb:66:in `perform_action_without_rescue'
/usr/lib/ruby/1.8/benchmark.rb:293:in `measure'
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/benchmarking.rb:66:in `perform_action_without_rescue'
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/rescue.rb:83:in `perform_action'
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/base.rb:431:in `process_without_filters'
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:685:in `process_without_session_management_support'
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/session_management.rb:114:in `process'
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/base.rb:330:in `process'
#{RAILS_ROOT}/vendor/rails/railties/lib/dispatcher.rb:41:in `dispatch'
#{RAILS_ROOT}/vendor/rails/railties/lib/fcgi_handler.rb:168:in `process_request'
#{RAILS_ROOT}/vendor/rails/railties/lib/fcgi_handler.rb:143:in `process_each_request!'
#{RAILS_ROOT}/vendor/rails/railties/lib/fcgi_handler.rb:109:in `with_signal_handler'
#{RAILS_ROOT}/vendor/rails/railties/lib/fcgi_handler.rb:142:in `process_each_request!'
/usr/lib/ruby/gems/1.8/gems/fcgi-0.8.7/lib/fcgi.rb:612:in `each_cgi'
/usr/lib/ruby/gems/1.8/gems/fcgi-0.8.7/lib/fcgi.rb:609:in `each_cgi'
#{RAILS_ROOT}/vendor/rails/railties/lib/fcgi_handler.rb:141:in `process_each_request!'
#{RAILS_ROOT}/vendor/rails/railties/lib/fcgi_handler.rb:55:in `process!'
#{RAILS_ROOT}/vendor/rails/railties/lib/fcgi_handler.rb:25:in `process!'
dispatch.fcgi:24

/home/specinti/typo41/app/controllers/admin/general_controller.rb:18:in `update_database'
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/base.rb:1097:in `perform_action_without_filters'
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:723:in `call_filters'
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:680:in `perform_action_without_benchmark'
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/benchmarking.rb:66:in `perform_action_without_rescue'
/usr/lib/ruby/1.8/benchmark.rb:293:in `measure'
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/benchmarking.rb:66:in `perform_action_without_rescue'
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/rescue.rb:83:in `perform_action'
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/base.rb:431:in `process_without_filters'
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:685:in `process_without_session_management_support'
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/session_management.rb:114:in `process'
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/base.rb:330:in `process'
#{RAILS_ROOT}/vendor/rails/railties/lib/dispatcher.rb:41:in `dispatch'
#{RAILS_ROOT}/vendor/rails/railties/lib/fcgi_handler.rb:168:in `process_request'
#{RAILS_ROOT}/vendor/rails/railties/lib/fcgi_handler.rb:143:in `process_each_request!'
#{RAILS_ROOT}/vendor/rails/railties/lib/fcgi_handler.rb:109:in `with_signal_handler'
#{RAILS_ROOT}/vendor/rails/railties/lib/fcgi_handler.rb:142:in `process_each_request!'
/usr/lib/ruby/gems/1.8/gems/fcgi-0.8.7/lib/fcgi.rb:612:in `each_cgi'
/usr/lib/ruby/gems/1.8/gems/fcgi-0.8.7/lib/fcgi.rb:609:in `each_cgi'
#{RAILS_ROOT}/vendor/rails/railties/lib/fcgi_handler.rb:141:in `process_each_request!'
#{RAILS_ROOT}/vendor/rails/railties/lib/fcgi_handler.rb:55:in `process!'
#{RAILS_ROOT}/vendor/rails/railties/lib/fcgi_handler.rb:25:in `process!'
dispatch.fcgi:24

Request

Parameters: None

Show session dump

---
:user: !ruby/object:User
  articles:
  attributes:
    notify_via_jabber:
    name: Matt
    notify_watch_my_articles:
    notify_via_email:
    id: "1"
    jabber:
    notify_on_comments:
    password: 4659c6dbac133e6a77425bfb6b9db3b57ad6390d
    login: mattbisme
    notify_on_new_articles:
    email: mattsubs@gmail.com
  notifications:
  notify_contents:
flash: !map:ActionController::Flash::FlashHash {}


Response
Headers: {"cookie"=>[], "Cache-Control"=>"no-cache"}