Hi,
I am trying to save an ActiveRecord object, and I am getting a strange
error - I checked and all of the required fields of the objects seem to
be present. Here is what I try to do:
self.user.save!
And the error is:
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.+
Do you have an idea what it may be? When I put a debug statement right
before, and examined self.user, it showed as if it''s ok:
#<User:0xb70ea1e8
@attributes={"salt"=>"L8Qymoyol2O7rA==",
"updated_at"=>"2007-12-30 09:58:06",
"details"=>"Valentin Chilaru, New
York NY", "lock_version"=>nil,
"password_salt"=>"bf99b345ef5e9c70c9afeb9dbdebdaed9b09ca3f41bb714c749e7aac3647f989",
"id"=>"3", "exposure"=>"0",
"first_name"=>"Valentin",
"login"=>"vchilaru",
"created_at"=>"2007-12-30 09:58:06",
"balance"=>"1000",
"active"=>"1"}>
Thanks
stacktrace:
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/connection_adapters/abstract/database_statements.rb:59:in
`transaction''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/transactions.rb:95:in
`transaction''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/transactions.rb:121:in
`transaction''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/transactions.rb:133:in
`save!''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/associations/association_proxy.rb:123:in
`send''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/associations/association_proxy.rb:123:in
`method_mis
--
Posted via http://www.ruby-forum.com/.
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On 12/30/07, Victor Al <rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org> wrote:> > Hi, > > I am trying to save an ActiveRecord object, and I am getting a strange > error - I checked and all of the required fields of the objects seem to > be present. Here is what I try to do: > > self.user.save! > > And the error is: > > 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.+ > > Do you have an idea what it may be?Not really but you can test stuff before trying to save it: self.user.save unless self.user.nil? You can''t access user.errors to find the validation that failed if user doesn''t first exist. -- Greg Donald http://destiney.com/ --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
Thanks, but as I said in my post, the user does exists (I have included the user object as shown by ruby-debugger). Greg Donald wrote:> On 12/30/07, Victor Al <rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org> wrote: >> >> 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.+ >> >> Do you have an idea what it may be? > > Not really but you can test stuff before trying to save it: > > self.user.save unless self.user.nil? > > You can''t access user.errors to find the validation that failed if > user doesn''t first exist. > > > -- > Greg Donald > http://destiney.com/-- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
On 31 Dec 2007, at 17:57, Victor Al wrote:> > Thanks, but as I said in my post, the user does exists (I have > included > the user object as shown by ruby-debugger).There should be a backtrace in the logs/console when your error occurs. That should guide you on your way. Fred> > > Greg Donald wrote: >> On 12/30/07, Victor Al <rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org> wrote: >>> >>> 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.+ >>> >>> Do you have an idea what it may be? >> >> Not really but you can test stuff before trying to save it: >> >> self.user.save unless self.user.nil? >> >> You can''t access user.errors to find the validation that failed if >> user doesn''t first exist. >> >> >> -- >> Greg Donald >> http://destiney.com/ > > -- > Posted via http://www.ruby-forum.com/. > > >--~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
How is the current object (self) associated with the user object? The references to AssociationProxy in the stacktrace may be pointing in that direction (malformed has_many/habtm/etc). AndyV On Dec 30 2007, 10:10 am, Victor Al <rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org> wrote:> Hi, > > I am trying to save an ActiveRecord object, and I am getting a strange > error - I checked and all of the required fields of the objects seem to > be present. Here is what I try to do: > > self.user.save! > > And the error is: > > 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.+ > > Do you have an idea what it may be? When I put a debug statement right > before, and examined self.user, it showed as if it''s ok: > > #<User:0xb70ea1e8 @attributes={"salt"=>"L8Qymoyol2O7rA==", > "updated_at"=>"2007-12-30 09:58:06", "details"=>"Valentin Chilaru, New > York NY", "lock_version"=>nil, > "password_salt"=>"bf99b345ef5e9c70c9afeb9dbdebdaed9b09ca3f41bb714c749e7aac3647f989", > "id"=>"3", "exposure"=>"0", "first_name"=>"Valentin", > "login"=>"vchilaru", "created_at"=>"2007-12-30 09:58:06", > "balance"=>"1000", "active"=>"1"}> > > Thanks > > stacktrace: > > /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/connection_adapters/abstract/database_statements.rb:59:in > `transaction'' > /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/transactions.rb:95:in > `transaction'' > /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/transactions.rb:121:in > `transaction'' > /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/transactions.rb:133:in > `save!'' > /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/associations/association_proxy.rb:123:in > `send'' > /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/associations/association_proxy.rb:123:in > `method_mis > -- > Posted viahttp://www.ruby-forum.com/.--~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
I think you are right - this seems to me to be the only explanation for this cryptic error about which I cannot see any more details. Thanks a lot for suggesting it. I have a very simple polymorphic association set up activity.rb belongs_to :transactionable, :polymorphic=>:true belongs_to :user user.rb has_many :activities and finally transfer.rb has_one :activity, :through=>:transactionable So there is no fancy association between user and activity, just belongs_to/has_many. I am simply trying to get to the user from the activity with activity.user.save! The polymorphic association is not even involved here. I know see one of the major drawbacks of Ruby as a language: very poor error messages. Thanks, V AndyV wrote:> How is the current object (self) associated with the user object? The > references to AssociationProxy in the stacktrace may be pointing in > that direction (malformed has_many/habtm/etc). > > AndyV > > On Dec 30 2007, 10:10 am, Victor Al <rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>-- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
> I know see one of the major drawbacks of Ruby as a language: very poor > error messages.I''m going to have to disagree with you there. The error messages are extremely detailed and the backtrace lets you see which files called what method on what line (unlike certain other languages). Can you show us the complete method that you''re calling? You could also try user.save! without the self. -- Ryan Bigg http://www.frozenplague.net Feel free to add me to MSN and/or GTalk as this email. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
Sure, here is the full error:
NoMethodError in ActivitiesController#new
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.+
RAILS_ROOT: script/../config/..
Application Trace | Framework Trace | Full Trace
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/locking/optimistic.rb:64:in
`update_without_callbacks''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/callbacks.rb:267:in
`update_without_timestamps''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/timestamp.rb:39:in
`update''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/base.rb:1792:in
`create_or_update_without_callbacks''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/callbacks.rb:242:in
`create_or_update''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/base.rb:1554:in
`save_without_validation!''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/validations.rb:762:in
`save_without_transactions!''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/transactions.rb:133:in
`save!''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/connection_adapters/abstract/database_statements.rb:59:in
`transaction''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/transactions.rb:95:in
`transaction''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/transactions.rb:121:in
`transaction''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/transactions.rb:133:in
`save!''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/associations/association_proxy.rb:123:in
`send''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/associations/association_proxy.rb:123:in
`method_missing''
/home/victor/workspaces/grow/app/controllers/activities_controller.rb:76:in
`update_user_balance''
/home/victor/workspaces/grow/app/controllers/activities_controller.rb:33:in
`new''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/locking/optimistic.rb:64:in
`update_without_callbacks''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/callbacks.rb:267:in
`update_without_timestamps''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/timestamp.rb:39:in
`update''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/base.rb:1792:in
`create_or_update_without_callbacks''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/callbacks.rb:242:in
`create_or_update''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/base.rb:1554:in
`save_without_validation!''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/validations.rb:762:in
`save_without_transactions!''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/transactions.rb:133:in
`save!''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/connection_adapters/abstract/database_statements.rb:59:in
`transaction''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/transactions.rb:95:in
`transaction''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/transactions.rb:121:in
`transaction''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/transactions.rb:133:in
`save!''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/associations/association_proxy.rb:123:in
`send''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/associations/association_proxy.rb:123:in
`method_missing''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/base.rb:1101:in
`send''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/base.rb:1101:in
`perform_action_without_filters''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/filters.rb:696:in
`call_filters''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/filters.rb:688:in
`perform_action_without_benchmark''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/benchmarking.rb:66:in
`perform_action_without_rescue''
/usr/lib/ruby/1.8/benchmark.rb:293:in `measure''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/benchmarking.rb:66:in
`perform_action_without_rescue''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/rescue.rb:83:in
`perform_action''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/base.rb:435:in
`send''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/base.rb:435:in
`process_without_filters''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/filters.rb:684:in
`process_without_session_management_support''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/session_management.rb:114:in
`process''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/base.rb:334:in
`process''
/usr/lib/ruby/gems/1.8/gems/rails-1.2.5/lib/dispatcher.rb:41:in
`dispatch''
/usr/lib/ruby/gems/1.8/gems/rails-1.2.5/lib/webrick_server.rb:113:in
`handle_dispatch''
/usr/lib/ruby/gems/1.8/gems/rails-1.2.5/lib/webrick_server.rb:79: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''
/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 `each''
/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-1.2.5/lib/webrick_server.rb:63:in
`dispatch''
/usr/lib/ruby/gems/1.8/gems/rails-1.2.5/lib/commands/servers/webrick.rb:59
/usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:27:in
`gem_original_require''
/usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:27:in `require''
/usr/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/dependencies.rb:495:in
`require''
/usr/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/dependencies.rb:342:in
`new_constants_in''
/usr/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/dependencies.rb:495:in
`require''
/usr/lib/ruby/gems/1.8/gems/rails-1.2.5/lib/commands/server.rb:39
/usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:27:in
`gem_original_require''
/usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:27:in `require''
script/server:3
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/locking/optimistic.rb:64:in
`update_without_callbacks''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/callbacks.rb:267:in
`update_without_timestamps''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/timestamp.rb:39:in
`update''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/base.rb:1792:in
`create_or_update_without_callbacks''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/callbacks.rb:242:in
`create_or_update''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/base.rb:1554:in
`save_without_validation!''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/validations.rb:762:in
`save_without_transactions!''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/transactions.rb:133:in
`save!''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/connection_adapters/abstract/database_statements.rb:59:in
`transaction''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/transactions.rb:95:in
`transaction''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/transactions.rb:121:in
`transaction''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/transactions.rb:133:in
`save!''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/associations/association_proxy.rb:123:in
`send''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/associations/association_proxy.rb:123:in
`method_missing''
/home/victor/workspaces/grow/app/controllers/activities_controller.rb:76:in
`update_user_balance''
/home/victor/workspaces/grow/app/controllers/activities_controller.rb:33:in
`new''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/base.rb:1101:in
`send''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/base.rb:1101:in
`perform_action_without_filters''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/filters.rb:696:in
`call_filters''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/filters.rb:688:in
`perform_action_without_benchmark''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/benchmarking.rb:66:in
`perform_action_without_rescue''
/usr/lib/ruby/1.8/benchmark.rb:293:in `measure''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/benchmarking.rb:66:in
`perform_action_without_rescue''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/rescue.rb:83:in
`perform_action''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/base.rb:435:in
`send''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/base.rb:435:in
`process_without_filters''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/filters.rb:684:in
`process_without_session_management_support''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/session_management.rb:114:in
`process''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/base.rb:334:in
`process''
/usr/lib/ruby/gems/1.8/gems/rails-1.2.5/lib/dispatcher.rb:41:in
`dispatch''
/usr/lib/ruby/gems/1.8/gems/rails-1.2.5/lib/webrick_server.rb:113:in
`handle_dispatch''
/usr/lib/ruby/gems/1.8/gems/rails-1.2.5/lib/webrick_server.rb:79: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''
/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 `each''
/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-1.2.5/lib/webrick_server.rb:63:in
`dispatch''
/usr/lib/ruby/gems/1.8/gems/rails-1.2.5/lib/commands/servers/webrick.rb:59
/usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:27:in
`gem_original_require''
/usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:27:in `require''
/usr/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/dependencies.rb:495:in
`require''
/usr/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/dependencies.rb:342:in
`new_constants_in''
/usr/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/dependencies.rb:495:in
`require''
/usr/lib/ruby/gems/1.8/gems/rails-1.2.5/lib/commands/server.rb:39
/usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:27:in
`gem_original_require''
/usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:27:in `require''
script/server:3
Request
Parameters: {"commit"=>"Save changes",
"transfer"=>{"approval"=>"true"},
"activity"=>{"size"=>"1",
"transactionable_type"=>"Transfer",
"description"=>"a",
"user_id"=>"3"}}
Show session dump
---
:current_user_id: 1
flash: !map:ActionController::Flash::FlashHash {}
Ryan Bigg wrote:>> I know see one of the major drawbacks of Ruby as a language: very poor
>> error messages.
>
>
> I''m going to have to disagree with you there. The error messages
are
> extremely detailed and the backtrace lets you see which files called
> what
> method on what line (unlike certain other languages).
>
> Can you show us the complete method that you''re calling?
>
> You could also try user.save! without the self.
>
> --
> Ryan Bigg
> http://www.frozenplague.net
> Feel free to add me to MSN and/or GTalk as this email.
--
Posted via http://www.ruby-forum.com/.
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On Jan 3, 2008 8:52 PM, Victor Al <rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org> wrote:> > Sure, here is the full error: > > NoMethodError in ActivitiesController#new > > 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.+ > > RAILS_ROOT: script/../config/.. > Application Trace | Framework Trace | Full Trace > > /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/locking/optimistic.rb:64:in > `update_without_callbacks''And what is in this file? /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/locking/optimistic.rb:64:in I''d bet it has something to do with lock_version being nil. -- Rick Olson http://lighthouseapp.com http://weblog.techno-weenie.net http://mephistoblog.com --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
There should be a much bigger backtrace than just that. Show us all of it please. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
What exactly would that mean and how would I fix it? If you want to see a larger stacktrace how would I get that? Thanks. Rick Olson wrote:> On Jan 3, 2008 8:52 PM, Victor Al <rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org> > wrote: >> Application Trace | Framework Trace | Full Trace >> >> /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/locking/optimistic.rb:64:in >> `update_without_callbacks'' > > And what is in this file? > > /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/locking/optimistic.rb:64:in > > I''d bet it has something to do with lock_version being nil. > > > > -- > Rick Olson > http://lighthouseapp.com > http://weblog.techno-weenie.net > http://mephistoblog.com-- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
On Jan 4, 2008 1:29 AM, Victor Al <rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org> wrote:> > What exactly would that mean and how would I fix it? > If you want to see a larger stacktrace how would I get that? > > Thanks. > > Rick Olson wrote: > > On Jan 3, 2008 8:52 PM, Victor Al <rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org> > > wrote: > >> Application Trace | Framework Trace | Full Trace > >> > >> /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/locking/optimistic.rb:64:in > >> `update_without_callbacks'' > > > > And what is in this file? > > > > /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/locking/optimistic.rb:64:in > > > > I''d bet it has something to do with lock_version being nil.Victor, First off, you really should learn not to top-post, adding your comments to the end rather than the beginning of messages (after appropriately trimming what''s being quoted, makes it much easier to follow the thread. That said, let me expand on Rick''s sage nudge on what to look for. Here are three lines from /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/locking/optimistic.rb starting with line 62, as the name of the file implies this has to do with ActiveRecord''s optimistic locking feature. lock_col = self.class.locking_column previous_value = send(lock_col) send(lock_col + ''='', previous_value + 1) Now what''s blowing up is that previous_value + 1, and previous_value is obviously nil from the error message. Where did previous value come from? Well it came from an attribute in the AR object whose name came from the class method locking_column, which unless you''ve overridden it, will return the name of the standard attribute name which AR uses for the lock field which is lock_version. Note that you posted this: #<User:0xb70ea1e8 @attributes={"salt"=>"L8Qymoyol2O7rA==", "updated_at"=>"2007-12-30 09:58:06", "details"=>"Valentin Chilaru, New York NY", "lock_version"=>nil, ... Showing that lock_version is indeed nil. Okay, now that we know that, we need to look at how AR expects you to set up lock_version. By convention it should be an integer field with a default value of 0, and this should be defined in a migration. class FixLockVersionInUser < ActiveRecord::Migration def self.up execute "UPDATE users SET lock_version = 0 WHERE lock_version IS NULL" change_column :users, :lock_version, :integer, :default => 0 end def self.down # You can probably just leave this out but to be pro-forma we put things back the way they were on a down. change_column :users, :lock_version, :integer end end -- Rick DeNatale My blog on Ruby http://talklikeaduck.denhaven2.com/ --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
> That said, let me expand on Rick''s sage nudge on what to look for. >Thanks for expanding that, Rick :) FWIW, Rails 2.0.x should fix this by calling #to_i on the nil value first. I can''t remember exactly when the fix was applied, so it might be in the next release of rails. It''s definitely in edge. -- Rick Olson http://lighthouseapp.com http://weblog.techno-weenie.net http://mephistoblog.com --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
On Jan 4, 2008 4:00 PM, Rick Olson <technoweenie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> > > That said, let me expand on Rick''s sage nudge on what to look for. > > > > Thanks for expanding that, Rick :)Hey, we Ricks need to hang together! <G> -- Rick DeNatale My blog on Ruby http://talklikeaduck.denhaven2.com/ --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
Rick Denatale wrote:> On Jan 4, 2008 4:00 PM, Rick Olson <technoweenie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote: >> >> > That said, let me expand on Rick''s sage nudge on what to look for. >> > >> >> Thanks for expanding that, Rick :) > > Hey, we Ricks need to hang together! <G> > > -- > Rick DeNatale > > My blog on Ruby > http://talklikeaduck.denhaven2.com/Guys, thanks a lot for helping me find the cause of this error! I now know to look more carefully at the error log. I had no idea this was due to the locking being nil, and I was going to mistakenly stop using polymorphic associations thinking it was due to it. -- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---