Rails - Apr 2009 - rake aborted! undefined method `empty?' for nil:NilClass

Hi,

I''m getting the next errors, would anyone have any suggestions?

Thanks.


[~/rails/hip]# rake --trace db:migrate RAILS_ENV="production"
(in /home/domain/rails/hip)
** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
rake aborted!
undefined method `empty?'' for nil:NilClass
/usr/lib/ruby/1.8/erb.rb:469:in `scan''
/usr/lib/ruby/1.8/erb.rb:525:in `compile''
/usr/lib/ruby/1.8/erb.rb:692:in `initialize''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/template_handlers/erb.rb:51:in
`new''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/template_handlers/erb.rb:51:in
`compile''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/template_handler.rb:11:in
`call''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/renderable.rb:21:in
`_unmemoized_compiled_source''
/usr/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/active_support/memoizable.rb:57:in
`compiled_source''
/usr/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/active_support/memoizable.rb:25:in
`__send__''
/usr/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/active_support/memoizable.rb:25:in
`memoize_all''
/usr/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/active_support/memoizable.rb:22:in
`each''
/usr/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/active_support/memoizable.rb:22:in
`memoize_all''
/usr/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/active_support/memoizable.rb:17:in
`freeze''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/paths.rb:88:in
`reload!''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/paths.rb:102:in
`templates_in_path''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/paths.rb:100:in
`each''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/paths.rb:100:in
`templates_in_path''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/paths.rb:86:in
`reload!''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/paths.rb:78:in
`load''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/paths.rb:109:in
`load''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/paths.rb:109:in
`each''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/paths.rb:109:in
`load''
/usr/lib/ruby/gems/1.8/gems/rails-2.2.2/lib/initializer.rb:357:in
`load_view_paths''
/usr/lib/ruby/gems/1.8/gems/rails-2.2.2/lib/initializer.rb:182:in
`process''
/usr/lib/ruby/gems/1.8/gems/rails-2.2.2/lib/initializer.rb:112:in
`send''
/usr/lib/ruby/gems/1.8/gems/rails-2.2.2/lib/initializer.rb:112:in `run''
/home/domain/rails/hip/config/environment.rb:15
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
`gem_original_require''
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require''
/usr/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/active_support/dependencies.rb:153:in
`require''
/usr/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/active_support/dependencies.rb:521:in
`new_constants_in''
/usr/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/active_support/dependencies.rb:153:in
`require''
/usr/lib/ruby/gems/1.8/gems/rails-2.2.2/lib/tasks/misc.rake:3
/usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:617:in `call''
/usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:617:in `execute''
/usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:612:in `each''
/usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:612:in `execute''
/usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:578:in
`invoke_with_call_chain''
/usr/lib/ruby/1.8/monitor.rb:242:in `synchronize''
/usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:571:in
`invoke_with_call_chain''
/usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:588:in
`invoke_prerequisites''
/usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:585:in `each''
/usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:585:in
`invoke_prerequisites''
/usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:577:in
`invoke_with_call_chain''
/usr/lib/ruby/1.8/monitor.rb:242:in `synchronize''
/usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:571:in
`invoke_with_call_chain''
/usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:564:in `invoke''
/usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:2019:in
`invoke_task''
/usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1997:in `top_level''
/usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1997:in `each''
/usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1997:in `top_level''
/usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:2036:in
`standard_exception_handling''
/usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1991:in `top_level''
/usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1970:in `run''
/usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:2036:in
`standard_exception_handling''
/usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1967:in `run''
/usr/lib/ruby/gems/1.8/gems/rake-0.8.3/bin/rake:31
/usr/bin/rake:19:in `load''
/usr/bin/rake:19
-- 
Posted via http://www.ruby-forum.com/.

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On 4-Apr-09, at 5:21 PM, comopasta Gr wrote:
>
> Hi,
>
> I''m getting the next errors, would anyone have any suggestions?
>
> Thanks.
>
>

> /home/domain/rails/hip/config/environment.rb:15
>

what''s on line 15 of your config/environment.rb ?


Jodi


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> what''s on line 15 of your config/environment.rb ?

Hi, yeah I was looking at that as well.

This is the line: config.active_record.observers = :user_observer
Commenting it out didn''t make a difference...

Regards.
-- 
Posted via http://www.ruby-forum.com/.

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On 4-Apr-09, at 5:51 PM, comopasta Gr wrote:
>
>
>> what''s on line 15 of your config/environment.rb ?
>
>
> Hi, yeah I was looking at that as well.
>
> This is the line: config.active_record.observers = :user_observer
> Commenting it out didn''t make a difference...
you restarted after commenting it out? the env is loaded once.

Jodi

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On 4-Apr-09, at 5:51 PM, comopasta Gr wrote:
>
>
>> what''s on line 15 of your config/environment.rb ?
>
>
> Hi, yeah I was looking at that as well.
>
> This is the line: config.active_record.observers = :user_observer
> Commenting it out didn''t make a difference...

forget my last comment. forgot it was a rake task - but you must have  
a different stack trace though...

J

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On Apr 4, 10:21 pm, comopasta Gr
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:
> Hi,
>
> I''m getting the next errors, would anyone have any suggestions?
>
> Thanks.
>
> [~/rails/hip]# rake --trace db:migrate RAILS_ENV="production"
> (in /home/domain/rails/hip)
> ** Invoke db:migrate (first_time)
> ** Invoke environment (first_time)
> ** Execute environment
> rake aborted!
> undefined method `empty?'' for nil:NilClass
> /usr/lib/ruby/1.8/erb.rb:469:in `scan''
> /usr/lib/ruby/1.8/erb.rb:525:in `compile''
> /usr/lib/ruby/1.8/erb.rb:692:in `initialize''
> /usr/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/template_handl
ers/erb.rb:51:in
> `new''
> /usr/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/template_handl
ers/erb.rb:51:in
> `compile''
> /usr/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/template_handl
er.rb:11:in
> `call''
From this part of the stack trace it looks likes it''s happening when
it preloads your view templates, maybe a template with something funny
in it ?

Fred
> /usr/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/renderable.rb:
21:in
> `_unmemoized_compiled_source''
> /usr/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/active_support/memoizab
le.rb:57:in
> `compiled_source''
> /usr/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/active_support/memoizab
le.rb:25:in
> `__send__''
> /usr/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/active_support/memoizab
le.rb:25:in
> `memoize_all''
> /usr/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/active_support/memoizab
le.rb:22:in
> `each''
> /usr/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/active_support/memoizab
le.rb:22:in
> `memoize_all''
> /usr/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/active_support/memoizab
le.rb:17:in
> `freeze''
> /usr/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/paths.rb:88:in
> `reload!''
> /usr/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/paths.rb:102:i
n
> `templates_in_path''
> /usr/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/paths.rb:100:i
n
> `each''
> /usr/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/paths.rb:100:i
n
> `templates_in_path''
> /usr/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/paths.rb:86:in
> `reload!''
> /usr/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/paths.rb:78:in
> `load''
> /usr/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/paths.rb:109:i
n
> `load''
> /usr/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/paths.rb:109:i
n
> `each''
> /usr/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/paths.rb:109:i
n
> `load''
> /usr/lib/ruby/gems/1.8/gems/rails-2.2.2/lib/initializer.rb:357:in
> `load_view_paths''
> /usr/lib/ruby/gems/1.8/gems/rails-2.2.2/lib/initializer.rb:182:in
> `process''
> /usr/lib/ruby/gems/1.8/gems/rails-2.2.2/lib/initializer.rb:112:in
`send''
> /usr/lib/ruby/gems/1.8/gems/rails-2.2.2/lib/initializer.rb:112:in
`run''
> /home/domain/rails/hip/config/environment.rb:15
> /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
> `gem_original_require''
> /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
`require''
> /usr/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/active_support/dependen
cies.rb:153:in
> `require''
> /usr/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/active_support/dependen
cies.rb:521:in
> `new_constants_in''
> /usr/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/active_support/dependen
cies.rb:153:in
> `require''
> /usr/lib/ruby/gems/1.8/gems/rails-2.2.2/lib/tasks/misc.rake:3
> /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:617:in `call''
> /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:617:in
`execute''
> /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:612:in `each''
> /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:612:in
`execute''
> /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:578:in
> `invoke_with_call_chain''
> /usr/lib/ruby/1.8/monitor.rb:242:in `synchronize''
> /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:571:in
> `invoke_with_call_chain''
> /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:588:in
> `invoke_prerequisites''
> /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:585:in `each''
> /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:585:in
> `invoke_prerequisites''
> /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:577:in
> `invoke_with_call_chain''
> /usr/lib/ruby/1.8/monitor.rb:242:in `synchronize''
> /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:571:in
> `invoke_with_call_chain''
> /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:564:in `invoke''
> /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:2019:in
`invoke_task''
> /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1997:in
`top_level''
> /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1997:in `each''
> /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1997:in
`top_level''
> /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:2036:in
> `standard_exception_handling''
> /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1991:in
`top_level''
> /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1970:in `run''
> /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:2036:in
> `standard_exception_handling''
> /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1967:in `run''
> /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/bin/rake:31
> /usr/bin/rake:19:in `load''
> /usr/bin/rake:19
> --
> Posted viahttp://www.ruby-forum.com/.
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Hi,

I''m thinking of re-creating the whole app completely. It is not public 
yet. But I don''t get this error.

On the site I just get "Application error Rails application failed to 
start properly". And then those "undefined method `empty?''
for
nil:NilClass"

Everything was just working fine, the only things I did when all that 
started was a very simple change to a controller, changing a css class 
to a template (not a new css class, an existing one already). The only 
out of the normal I did was running migrate to add this line to a table:

execute "alter table attachments add constraint fk_messages foreign key 
(message_id) references messages(id) ON DELETE CASCADE"

That was commented out and I removed the # to run the migrate. But that 
is working fine with my local environment.

Looks like Rails can be very cryptic when it comes to debugging these 
type of issues...

Like I said thinking of re-creating the whole thing again to see if it 
goes ok.

Cheers x-|





-- 
Posted via http://www.ruby-forum.com/.

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Have you tried going back to the previous version (that worked) and then
moving forward again?

2009/4/6 comopasta Gr
<rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
>
> Hi,
>
> I''m thinking of re-creating the whole app completely. It is not
public
> yet. But I don''t get this error.
>
> On the site I just get "Application error Rails application failed to
> start properly". And then those "undefined method
`empty?'' for
> nil:NilClass"
>
> Everything was just working fine, the only things I did when all that
> started was a very simple change to a controller, changing a css class
> to a template (not a new css class, an existing one already). The only
> out of the normal I did was running migrate to add this line to a table:
>
> execute "alter table attachments add constraint fk_messages foreign
key
> (message_id) references messages(id) ON DELETE CASCADE"
>
> That was commented out and I removed the # to run the migrate. But that
> is working fine with my local environment.
>
> Looks like Rails can be very cryptic when it comes to debugging these
> type of issues...
>
> Like I said thinking of re-creating the whole thing again to see if it
> goes ok.
>
> Cheers x-|
>
>
>
>
>
> --
> Posted via http://www.ruby-forum.com/.
>
> >
>
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Do you read rails documentation properly.

On Tue, Apr 7, 2009 at 3:07 PM, Colin Law
<clanlaw-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org> wrote:
> Have you tried going back to the previous version (that worked) and then
> moving forward again?
>
> 2009/4/6 comopasta Gr
<rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
>
>
>> Hi,
>>
>> I''m thinking of re-creating the whole app completely. It is
not public
>> yet. But I don''t get this error.
>>
>> On the site I just get "Application error Rails application failed
to
>> start properly". And then those "undefined method
`empty?'' for
>> nil:NilClass"
>>
>> Everything was just working fine, the only things I did when all that
>> started was a very simple change to a controller, changing a css class
>> to a template (not a new css class, an existing one already). The only
>> out of the normal I did was running migrate to add this line to a
table:
>>
>> execute "alter table attachments add constraint fk_messages
foreign key
>> (message_id) references messages(id) ON DELETE CASCADE"
>>
>> That was commented out and I removed the # to run the migrate. But that
>> is working fine with my local environment.
>>
>> Looks like Rails can be very cryptic when it comes to debugging these
>> type of issues...
>>
>> Like I said thinking of re-creating the whole thing again to see if it
>> goes ok.
>>
>> Cheers x-|
>>
>>
>>
>>
>>
>> --
>> Posted via http://www.ruby-forum.com/.
>>
>>
>>
>
> >
>
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On Apr 6, 10:22 pm, comopasta Gr
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:
>
> That was commented out and I removed the # to run the migrate. But that
> is working fine with my local environment.
>
I bet that if you set config.cache_classes = true in development.rb
then you''ll get this issue locally, which should make it easier to
diagnose.

Fred
> Looks like Rails can be very cryptic when it comes to debugging these
> type of issues...
>
> Like I said thinking of re-creating the whole thing again to see if it
> goes ok.
>
> Cheers x-|
>
> --
> Posted viahttp://www.ruby-forum.com/.
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>>Have you tried going back to the previous version (that worked) and then
>>moving forward again?
I did, no help.

>> Do you read rails documentation properly.
Klingons said: "specs are for the weak and the timid"
Sniff. Yes and no to your question. My RoR focus time is between 10:30 
PM to 01:00 AM every "day", I jump in straight to the code. I must
admit
that I should do better. However I do really use the documentation 
frequently, this time I didn''t know were to start actually. Of course 
the fact that I read it doesn''t mean that I understand it, I try at 
least before requesting help from you guys.

> I bet that if you set config.cache_classes = true in development.rb
> then you''ll get this issue locally, which should make it easier to
> diagnose.
I won''t ever bet anything with you Fred. I set that to false and now it
works fine. I have been running migrations and made all sort of changes 
for a long time with that set to true and it has been ok. But now it 
really hit me.

Thanks so much to all for your help guys!

Cheers.



-- 
Posted via http://www.ruby-forum.com/.

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On Apr 7, 1:07 pm, comopasta Gr
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:
>
> > I bet that if you set config.cache_classes = true in development.rb
> > then you''ll get this issue locally, which should make it
easier to
> > diagnose.
>
> I won''t ever bet anything with you Fred. I set that to false and
now it
> works fine. I have been running migrations and made all sort of changes
> for a long time with that set to true and it has been ok. But now it
> really hit me.
That setting should absolutely be set to true or your production site
will running a lot slower. I was merely suggesting that playing with
that would allow you to reproduce the problem on your local machine.
One of the things that setting does is make models, controllers, views
etc. be loaded at start time (rather than on demand) and a side effect
of that is that views or models you don''t use will get loaded anyway,
so an error in code that you never actually call or a view that you
never display can still hit you

Fred
>
> Thanks so much to all for your help guys!
>
> Cheers.
>
> --
> Posted viahttp://www.ruby-forum.com/.
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