thr3ads.net - Rails - [Rails] Uninitialized Constant in scaffold list page [May 2006]

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Strider

2006-May-18 00:09 UTC

[Rails] Uninitialized Constant in scaffold list page

I''m new to Ruby on Rails and just trying to get it up and running.
I''m
using RadRails, but I don''t think that matters for this problem.

I''ve got a very basic app with one table and I used the scaffold 
generator for a table called datedgoals. The new page works fine, but 
then when it switches over to the list page, I get the errors below. Any 
idea how to fix this? Thanks!

NameError in DatedgoalsController#index
uninitialized constant Datedgoal
RAILS_ROOT: ./script/../config/..

Application Trace | Framework Trace | Full Trace
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:123:in
`const_missing''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:131:in
`const_missing''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/inflector.rb:161:in
`constantize''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/core_ext/string/inflections.rb:59:in
`constantize''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/pagination.rb:194:in
`paginator_and_collection_for''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/pagination.rb:129:in
`paginate''
#{RAILS_ROOT}/app/controllers/datedgoals_controller.rb:12:in `list''
#{RAILS_ROOT}/app/controllers/datedgoals_controller.rb:3:in `index''
-e:4
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:123:in
`const_missing''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:131:in
`const_missing''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/inflector.rb:161:in
`constantize''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/core_ext/string/inflections.rb:59:in
`constantize''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/pagination.rb:194:in
`paginator_and_collection_for''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/pagination.rb:129:in
`paginate''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/base.rb:910:in
`perform_action_without_filters''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/filters.rb:368:in
`perform_action_without_benchmark''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/benchmarking.rb:69:in
`perform_action_without_rescue''
C:/InstantRails/ruby/lib/ruby/1.8/benchmark.rb:293:in `measure''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/benchmarking.rb:69:in
`perform_action_without_rescue''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/rescue.rb:82:in
`perform_action''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/base.rb:381:in
`process_without_filters''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/filters.rb:377:in
`process_without_session_management_support''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/session_management.rb:117:in
`process''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/dispatcher.rb:38:in 
`dispatch''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/webrick_server.rb:115:in
`handle_dispatch''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/webrick_server.rb:81:in
`service''
C:/InstantRails/ruby/lib/ruby/1.8/webrick/httpserver.rb:104:in
`service''
C:/InstantRails/ruby/lib/ruby/1.8/webrick/httpserver.rb:65:in `run''
C:/InstantRails/ruby/lib/ruby/1.8/webrick/server.rb:173:in 
`start_thread''
C:/InstantRails/ruby/lib/ruby/1.8/webrick/server.rb:162:in 
`start_thread''
C:/InstantRails/ruby/lib/ruby/1.8/webrick/server.rb:95:in `start''
C:/InstantRails/ruby/lib/ruby/1.8/webrick/server.rb:92:in `start''
C:/InstantRails/ruby/lib/ruby/1.8/webrick/server.rb:23:in `start''
C:/InstantRails/ruby/lib/ruby/1.8/webrick/server.rb:82:in `start''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/webrick_server.rb:67:in
`dispatch''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/commands/servers/webrick.rb:59
C:/InstantRails/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in 
`require''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:in
`require''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/commands/server.rb:30
C:/InstantRails/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in 
`require''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:in
`require''
script/server:3
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:123:in
`const_missing''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:131:in
`const_missing''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/inflector.rb:161:in
`constantize''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/core_ext/string/inflections.rb:59:in
`constantize''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/pagination.rb:194:in
`paginator_and_collection_for''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/pagination.rb:129:in
`paginate''
#{RAILS_ROOT}/app/controllers/datedgoals_controller.rb:12:in `list''
#{RAILS_ROOT}/app/controllers/datedgoals_controller.rb:3:in `index''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/base.rb:910:in
`perform_action_without_filters''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/filters.rb:368:in
`perform_action_without_benchmark''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/benchmarking.rb:69:in
`perform_action_without_rescue''
C:/InstantRails/ruby/lib/ruby/1.8/benchmark.rb:293:in `measure''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/benchmarking.rb:69:in
`perform_action_without_rescue''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/rescue.rb:82:in
`perform_action''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/base.rb:381:in
`process_without_filters''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/filters.rb:377:in
`process_without_session_management_support''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/session_management.rb:117:in
`process''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/dispatcher.rb:38:in 
`dispatch''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/webrick_server.rb:115:in
`handle_dispatch''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/webrick_server.rb:81:in
`service''
C:/InstantRails/ruby/lib/ruby/1.8/webrick/httpserver.rb:104:in
`service''
C:/InstantRails/ruby/lib/ruby/1.8/webrick/httpserver.rb:65:in `run''
C:/InstantRails/ruby/lib/ruby/1.8/webrick/server.rb:173:in 
`start_thread''
C:/InstantRails/ruby/lib/ruby/1.8/webrick/server.rb:162:in 
`start_thread''
C:/InstantRails/ruby/lib/ruby/1.8/webrick/server.rb:95:in `start''
C:/InstantRails/ruby/lib/ruby/1.8/webrick/server.rb:92:in `start''
C:/InstantRails/ruby/lib/ruby/1.8/webrick/server.rb:23:in `start''
C:/InstantRails/ruby/lib/ruby/1.8/webrick/server.rb:82:in `start''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/webrick_server.rb:67:in
`dispatch''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/commands/servers/webrick.rb:59
C:/InstantRails/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in 
`require''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:in
`require''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/commands/server.rb:30
C:/InstantRails/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in 
`require''
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:in
`require''
script/server:3
-e:4
This error occured while loading the following files:
   datedgoal.rb
Request
Parameters: None

Show session dump

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


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


HERE IS THE LOG FILE OF THE ERROR:
I don''t quit understand the logs yet. If anyone knows of documentation 
that explains it, please let me know.

Processing DatedgoalsController#list (for 127.0.0.1 at 2006-05-17 
16:40:17) [GET]
  Session ID: 1bd9acaa84affa404d15918ceb8c7f80
  Parameters: {"action"=>"list",
"controller"=>"datedgoals"}


NameError (uninitialized constant Datedgoal):
   
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:123:in
`const_missing''
   
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:131:in
`const_missing''
   
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/inflector.rb:161:in
`constantize''
   
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/core_ext/string/inflections.rb:59:in
`constantize''
   
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/pagination.rb:194:in
`paginator_and_collection_for''
   
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/pagination.rb:129:in
`paginate''
    /app/controllers/datedgoals_controller.rb:12:in `list''
   
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/base.rb:910:in
`perform_action_without_filters''
   
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/filters.rb:368:in
`perform_action_without_benchmark''
   
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/benchmarking.rb:69:in
`perform_action_without_rescue''
    C:/InstantRails/ruby/lib/ruby/1.8/benchmark.rb:293:in `measure''
   
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/benchmarking.rb:69:in
`perform_action_without_rescue''
   
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/rescue.rb:82:in
`perform_action''
   
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/base.rb:381:in
`process_without_filters''
   
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/filters.rb:377:in
`process_without_session_management_support''
   
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/session_management.rb:117:in
`process''
   
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/dispatcher.rb:38:in
`dispatch''
   
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/webrick_server.rb:115:in
`handle_dispatch''
   
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/webrick_server.rb:81:in
`service''
    C:/InstantRails/ruby/lib/ruby/1.8/webrick/httpserver.rb:104:in 
`service''
    C:/InstantRails/ruby/lib/ruby/1.8/webrick/httpserver.rb:65:in `run''
    C:/InstantRails/ruby/lib/ruby/1.8/webrick/server.rb:173:in 
`start_thread''
    C:/InstantRails/ruby/lib/ruby/1.8/webrick/server.rb:162:in 
`start_thread''
    C:/InstantRails/ruby/lib/ruby/1.8/webrick/server.rb:95:in `start''
    C:/InstantRails/ruby/lib/ruby/1.8/webrick/server.rb:92:in `start''
    C:/InstantRails/ruby/lib/ruby/1.8/webrick/server.rb:23:in `start''
    C:/InstantRails/ruby/lib/ruby/1.8/webrick/server.rb:82:in `start''
   
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/webrick_server.rb:67:in
`dispatch''
   
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/commands/servers/webrick.rb:59
    C:/InstantRails/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in
`require''
   
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:in
`require''
   
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/commands/server.rb:30
    C:/InstantRails/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in
`require''
   
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:in
`require''
    ./script/server:3
    -e:4


Rendering 
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/templates/rescues/layout.rhtml
(500 Internal Error)





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

sean colquhoun

2006-May-18 00:58 UTC

head link

[Rails] Re: Uninitialized Constant in scaffold list page

I''m afraid I can''t help you, but I can sympathize ?
I''m having the exact
same problem. The frustrating thing is that I''ve done this before and 
it''s worked fine. I haven''t changed my rails settings or
updated to a
new version either. The only thing I can think of is that I''ve been 
using "./script/server -e development" or "./script/server -e 
production" to explicitly start the server recently instead of just 
"./script/server". My scaffold command is just "./script/generate
scaffold model controller". I''m following the AWDWR book to the
letter
and it''s still not working.

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

sean colquhoun

2006-May-18 02:04 UTC

head link

[Rails] Re: Uninitialized Constant in scaffold list page

Hmm. I''m playing with it and I wonder if it has anything to do with 
Rails'' naming conventions. Maybe something is capitalized that
shouldn''t
be, or not capitalized that should. For example, all of my database 
table names are in ALL CAPS. When I generate the scaffold, i use 
lowercase for the names. I''ve tried capitalizing them, or capitalizing 
the first letters, but that didn''t work either. They''re all
plurals, so
there''s no problem there.

Hmm.


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

Strider

2006-May-18 04:30 UTC

head link

[Rails] Re: Uninitialized Constant in scaffold list page

Thanks for taking a look Sean. I really appreciate it. I was thinking 
about naming conventions and capitalization too. I got excited for a 
minute when I realized that the example I was following capitalized 
something that I didn''t. I started a whole new project, following the 
steps exactly and capitalizing what they did. But it didn''t fix the 
problem. Same thing.

I''m trying a more manual work-around now, following the "Rolling
with
InstantRails" steps, but in RadRails. We''ll see if that works.

If you figure anything out, please let me know!

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

Strider

2006-May-18 04:46 UTC

head link

[Rails] Re: Uninitialized Constant in scaffold list page

Aha! I got it to work (once at least) I think I know what I did 
differently. I suspect that I created the scaffold name plural, when it 
should have been singular.

CORRECT:

ruby script/generate scaffold Datedgoal

INCORRECT:

ruby script/generate scaffold Datedgoals

I still not certain that''s the difference. Stupid mistake. I doubt 
that''s the same problem you''re seeing, but maybe.

Good luck.

If anyone out there has a better explanation that would help us 
understand, and would fix Seans problem, please post.

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

sean colquhoun

2006-May-18 05:43 UTC

head link

[Rails] Re: Uninitialized Constant in scaffold list page

You''re right - it works! *high five*

Thanks dude.

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

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