Re: nil object in create_time_zone_conversion_attribute?

KenM
Fri, 19 Dec 2008 21:23:36 -0000

Some further information....

This issue is apparently caused by not passing enough parameters to
the route helpers when you have nested resources.  For example, I have
a gallery, which has a nested image resource.  When generating links
in the view, I called the helper, but I didn''t pass an array with both
the gallery and the image, only the image.

The first time presenting the view would work; the second, I would get
the stack trace, and from that point on the mongrel instance is
hooped, and would not serve any content.  It would have to be
restarted.

I''ve fixed the view, and the problem is now resolved.

However, I''m concerned about being able to crash mongrel hard this
way.....

On Dec 19, 1:47 pm, KenM <Anda...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> Full trace below...
>
> This issue is not machine specific, as I get the same error on my
> laptop.  Both systems are up to date with respect to gems....
>
> NoMethodError (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.include?):
>     /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/
> active_record/attribute_methods.rb:142:in
> `create_time_zone_conversion_attribute?''
>     /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/
> active_record/attribute_methods.rb:75:in
`define_attribute_methods''
>     /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/
> active_record/attribute_methods.rb:71:in `each''
>     /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/
> active_record/attribute_methods.rb:71:in
`define_attribute_methods''
>     /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/
> active_record/attribute_methods.rb:242:in `method_missing''
>     /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/
> active_record/base.rb:2662:in `hash''
>     /opt/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/
> action_controller/dispatcher.rb:150:in `clear''
>     /opt/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/
> action_controller/dispatcher.rb:150:in `reload_application''
>     /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/
> active_support/callbacks.rb:178:in `send''
>     /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/
> active_support/callbacks.rb:178:in `evaluate_method''
>     /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/
> active_support/callbacks.rb:166:in `call''
>     /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/
> active_support/callbacks.rb:90:in `run''
>     /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/
> active_support/callbacks.rb:90:in `each''
>     /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/
> active_support/callbacks.rb:90:in `send''
>     /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/
> active_support/callbacks.rb:90:in `run''
>     /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/
> active_support/callbacks.rb:277:in `run_callbacks''
>     /opt/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/
> action_controller/dispatcher.rb:109:in `dispatch_unlocked''
>     /opt/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/
> action_controller/dispatcher.rb:123:in `dispatch''
>     /opt/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/
> action_controller/dispatcher.rb:122:in `synchronize''
>     /opt/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/
> action_controller/dispatcher.rb:122:in `dispatch''
>     /opt/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/
> action_controller/dispatcher.rb:132:in `dispatch_cgi''
>     /opt/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/
> action_controller/dispatcher.rb:39:in `dispatch''
>     /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/
> rails.rb:76:in `process''
>     /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/
> rails.rb:74:in `synchronize''
>     /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/
> rails.rb:74:in `process''
>     /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:
> 159:in `process_client''
>     /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:
> 158:in `each''
>     /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:
> 158:in `process_client''
>     /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:
> 285:in `run''
>     /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:
> 285:in `initialize''
>     /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:
> 285:in `new''
>     /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:
> 285:in `run''
>     /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:
> 268:in `initialize''
>     /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:
> 268:in `new''
>     /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:
> 268:in `run''
>     /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/
> configurator.rb:282:in `run''
>     /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/
> configurator.rb:281:in `each''
>     /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/
> configurator.rb:281:in `run''
>     /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/mongrel_rails:
> 128:in `run''
>     /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/
> command.rb:212:in `run''
>     /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/mongrel_rails:
> 281
>     /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/
> active_support/dependencies.rb:142:in
> `load_without_new_constant_marking''
>     /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/
> active_support/dependencies.rb:142:in `load''
>     /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/
> active_support/dependencies.rb:521:in `new_constants_in''
>     /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/
> active_support/dependencies.rb:142:in `load''
>     /opt/local/lib/ruby/gems/1.8/gems/rails-2.2.2/lib/commands/servers/
> mongrel.rb:64
>     /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
> `gem_original_require''
>     /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
> `require''
>     /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/
> active_support/dependencies.rb:153:in `require''
>     /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/
> active_support/dependencies.rb:521:in `new_constants_in''
>     /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/
> active_support/dependencies.rb:153:in `require''
>     /opt/local/lib/ruby/gems/1.8/gems/rails-2.2.2/lib/commands/
> server.rb:49
>     /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
> `gem_original_require''
>     /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
> `require''
>     script/server:3
>
> On Dec 19, 12:36 pm, sadeesh kumar viswanathan
<sadath...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> wrote:
>
> > Paste you full error trace here.
>
> > Thanks,
> > Sadeesh.
>
> > On Dec 19, 9:23 pm, KenM
<Anda...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > > Happily coding away in a Rails 2.2.2 Bort based-app, when I
suddenly
> > > start getting this error after a few requests:
>
> > > NoMethodError (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.include?):
> > >     /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/
> > > active_record/attribute_methods.rb:142:in
> > > `create_time_zone_conversion_attribute?''
> > >     /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/
> > > active_record/attribute_methods.rb:75:in
`define_attribute_methods''
>
> > > This only appears if I authenticate to the application.  I can
make a
> > > couple of requests, then i start getting the above error.  While
I
> > > don''t think I''ve made any changes to cause
something like this, when
> > > you''re so far removed from the low-level bits of the
framework, it''s
> > > hard to tell.
>
> > > I''ve searched the net, and while I''ve found a
few hits on this, there
> > > are no solutions to be found.
>
> > > Anyone have any suggestions?
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