NoMethodError in PostsController#create

You have a nil object when you didn't expect it!
The error occured while evaluating nil.zero?

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

vendor/plugins/acts_as_threaded/lib/threaded.rb:73:in `after_create'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/callbacks.rb:348:in `callback'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/callbacks.rb:262:in `create_without_timestamps'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/timestamp.rb:30:in `create'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/base.rb:1718:in `create_or_update_without_callbacks'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/callbacks.rb:249:in `create_or_update'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/base.rb:1392:in `save_without_validation'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/validations.rb:724:in `save_without_transactions'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/transactions.rb:126:in `save'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/connection_adapters/abstract/database_statements.rb:51:in `transaction'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/transactions.rb:91:in `transaction'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/transactions.rb:118:in `transaction'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/transactions.rb:126:in `save'
#{RAILS_ROOT}/app/controllers/posts_controller.rb:31:in `create'

vendor/plugins/acts_as_threaded/lib/threaded.rb:73:in `after_create'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/callbacks.rb:348:in `callback'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/callbacks.rb:262:in `create_without_timestamps'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/timestamp.rb:30:in `create'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/base.rb:1718:in `create_or_update_without_callbacks'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/callbacks.rb:249:in `create_or_update'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/base.rb:1392:in `save_without_validation'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/validations.rb:724:in `save_without_transactions'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/transactions.rb:126:in `save'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/connection_adapters/abstract/database_statements.rb:51:in `transaction'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/transactions.rb:91:in `transaction'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/transactions.rb:118:in `transaction'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/transactions.rb:126:in `save'
/usr/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/base.rb:910:in `perform_action_without_filters'
/usr/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/filters.rb:368:in `perform_action_without_benchmark'
/usr/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/benchmarking.rb:69:in `perform_action_without_rescue'
/usr/lib/ruby/1.8/benchmark.rb:293:in `measure'
/usr/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/benchmarking.rb:69:in `perform_action_without_rescue'
/usr/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/rescue.rb:82:in `perform_action'
/usr/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/base.rb:381:in `process_without_filters'
/usr/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/filters.rb:377:in `process_without_session_management_support'
/usr/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/session_management.rb:117:in `process'
/usr/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/dispatcher.rb:38:in `dispatch'
/usr/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/webrick_server.rb:115:in `handle_dispatch'
/usr/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/webrick_server.rb:81:in `service'
/usr/lib/ruby/1.8/webrick/httpserver.rb:104:in `service'
/usr/lib/ruby/1.8/webrick/httpserver.rb:65:in `run'
/usr/lib/ruby/1.8/webrick/server.rb:173:in `start_thread'
/usr/lib/ruby/1.8/webrick/server.rb:162:in `start_thread'
/usr/lib/ruby/1.8/webrick/server.rb:95:in `start'
/usr/lib/ruby/1.8/webrick/server.rb:92:in `start'
/usr/lib/ruby/1.8/webrick/server.rb:23:in `start'
/usr/lib/ruby/1.8/webrick/server.rb:82:in `start'
/usr/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/webrick_server.rb:67:in `dispatch'
/usr/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/commands/servers/webrick.rb:59
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in `require'
/usr/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:in `require'
/usr/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/commands/server.rb:30
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in `require'
/usr/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:in `require'
script/server:3

vendor/plugins/acts_as_threaded/lib/threaded.rb:73:in `after_create'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/callbacks.rb:348:in `callback'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/callbacks.rb:262:in `create_without_timestamps'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/timestamp.rb:30:in `create'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/base.rb:1718:in `create_or_update_without_callbacks'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/callbacks.rb:249:in `create_or_update'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/base.rb:1392:in `save_without_validation'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/validations.rb:724:in `save_without_transactions'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/transactions.rb:126:in `save'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/connection_adapters/abstract/database_statements.rb:51:in `transaction'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/transactions.rb:91:in `transaction'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/transactions.rb:118:in `transaction'
/usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/transactions.rb:126:in `save'
#{RAILS_ROOT}/app/controllers/posts_controller.rb:31:in `create'
/usr/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/base.rb:910:in `perform_action_without_filters'
/usr/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/filters.rb:368:in `perform_action_without_benchmark'
/usr/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/benchmarking.rb:69:in `perform_action_without_rescue'
/usr/lib/ruby/1.8/benchmark.rb:293:in `measure'
/usr/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/benchmarking.rb:69:in `perform_action_without_rescue'
/usr/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/rescue.rb:82:in `perform_action'
/usr/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/base.rb:381:in `process_without_filters'
/usr/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/filters.rb:377:in `process_without_session_management_support'
/usr/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/session_management.rb:117:in `process'
/usr/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/dispatcher.rb:38:in `dispatch'
/usr/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/webrick_server.rb:115:in `handle_dispatch'
/usr/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/webrick_server.rb:81:in `service'
/usr/lib/ruby/1.8/webrick/httpserver.rb:104:in `service'
/usr/lib/ruby/1.8/webrick/httpserver.rb:65:in `run'
/usr/lib/ruby/1.8/webrick/server.rb:173:in `start_thread'
/usr/lib/ruby/1.8/webrick/server.rb:162:in `start_thread'
/usr/lib/ruby/1.8/webrick/server.rb:95:in `start'
/usr/lib/ruby/1.8/webrick/server.rb:92:in `start'
/usr/lib/ruby/1.8/webrick/server.rb:23:in `start'
/usr/lib/ruby/1.8/webrick/server.rb:82:in `start'
/usr/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/webrick_server.rb:67:in `dispatch'
/usr/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/commands/servers/webrick.rb:59
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in `require'
/usr/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:in `require'
/usr/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/commands/server.rb:30
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in `require'
/usr/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:in `require'
script/server:3

Request

Parameters: {"commit"=>"Create", "post"=>{"updated_at(1i)"=>"2006", "updated_at(2i)"=>"6", "created_at(1i)"=>"2006", "updated_at(3i)"=>"1", "created_at(2i)"=>"6", "body"=>"test22", "title"=>"test2", "updated_at(4i)"=>"16", "created_at(3i)"=>"1", "depth"=>"0", "updated_at(5i)"=>"07", "created_at(4i)"=>"16", "lft"=>"0", "created_at(5i)"=>"07", "parent_id"=>"", "rgt"=>"0"}}

Show session dump

--- 
flash: !map:ActionController::Flash::FlashHash {}


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