# Paginate causes unitialized constant error

**URL:** <https://www.ruby-forum.com/t/paginate-causes-unitialized-constant-error/92963>\
**Category:** Rails\
**Created:** [April 26, 2007, 3:05am UTC](https://www.ruby-forum.com/t/paginate-causes-unitialized-constant-error/92963 "2007-04-26T03:05:10Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![wickie](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/w/ba9def/32.png) [@wickie](https://www.ruby-forum.com/u/wickie)\
**Post date:** [April 26, 2007, 3:05am UTC](https://www.ruby-forum.com/t/paginate-causes-unitialized-constant-error/92963/1 "2007-04-26T03:05:10Z")

</div>

Earlier this week, I posted a question about scaffold causing an  
unitialized constant. As no one seemed to have any information, I  
started coding without the scaffolding. I’m now getting the error again.

In my controller, I started with the following line of code in a list  
type method:  
@quotes = Quotes.find :all

This works fine. As there are many quotes in the database, however, I  
replaced it with the following line:  
@quote\_pages, @quotes = paginate(:quotes, :order =\> “author”)

This was the _ONLY_ change. Immediately, my error came back. For those  
that didn’t see the original post, here’s the error that is returned:

* * *

uninitialized constant Quote

RAILS\_ROOT: script/…/config/…  
Application Trace | Framework Trace | Full Trace

/usr//lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active\_support/dependencies.rb:123:in  
`const_missing' /usr//lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:131:in`const\_missing’  
/usr//lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active\_support/inflector.rb:161:in  
`constantize' /usr//lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/core_ext/string/inflections.rb:59:in`constantize’  
/usr//lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action\_controller/pagination.rb:194:in  
`paginator_and_collection_for' /usr//lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/pagination.rb:129:in`paginate’  
app/controllers/admin\_controller.rb:6:in `quotes’

/usr//lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active\_support/dependencies.rb:123:in  
`const_missing' /usr//lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:131:in`const\_missing’  
/usr//lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active\_support/inflector.rb:161:in  
`constantize' /usr//lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/core_ext/string/inflections.rb:59:in`constantize’  
/usr//lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action\_controller/pagination.rb:194:in  
`paginator_and_collection_for' /usr//lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/pagination.rb:129:in`paginate’  
/usr//lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action\_controller/base.rb:941:in  
`send' /usr//lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/base.rb:941:in`perform\_action\_without\_filters’  
/usr//lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action\_controller/filters.rb:368:in  
`perform_action_without_benchmark' /usr//lib/ruby/gems/1.8/gems/actionpack-1.12.5/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-1.12.5/lib/action_controller/benchmarking.rb:69:in`perform\_action\_without\_rescue’  
/usr//lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action\_controller/rescue.rb:82:in  
`perform_action' /usr//lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/base.rb:408:in`send’  
/usr//lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action\_controller/base.rb:408:in  
`process_without_filters' /usr//lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/filters.rb:377:in`process\_without\_session\_management\_support’  
/usr//lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action\_controller/session\_management.rb:117:in  
`process' /usr//lib/ruby/gems/1.8/gems/rails-1.1.6/lib/dispatcher.rb:38:in`dispatch’  
/usr//lib/ruby/gems/1.8/gems/rails-1.1.6/lib/webrick\_server.rb:115:in  
`handle_dispatch' /usr//lib/ruby/gems/1.8/gems/rails-1.1.6/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’  
/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-1.1.6/lib/webrick\_server.rb:67:in  
`dispatch' /usr//lib/ruby/gems/1.8/gems/rails-1.1.6/lib/commands/servers/webrick.rb:59 /usr//lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in`gem\_original\_require’  
/usr//lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb:27: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-1.1.6/lib/commands/server.rb:30  
/usr//lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb:27:in  
`gem_original_require' /usr//lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in`require’  
/usr//lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active\_support/dependencies.rb:147:in  
`require’  
script/server:3

/usr//lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active\_support/dependencies.rb:123:in  
`const_missing' /usr//lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:131:in`const\_missing’  
/usr//lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active\_support/inflector.rb:161:in  
`constantize' /usr//lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/core_ext/string/inflections.rb:59:in`constantize’  
/usr//lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action\_controller/pagination.rb:194:in  
`paginator_and_collection_for' /usr//lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/pagination.rb:129:in`paginate’  
app/controllers/admin\_controller.rb:6:in `quotes' /usr//lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/base.rb:941:in`send’  
/usr//lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action\_controller/base.rb:941:in  
`perform_action_without_filters' /usr//lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/filters.rb:368:in`perform\_action\_without\_benchmark’  
/usr//lib/ruby/gems/1.8/gems/actionpack-1.12.5/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-1.12.5/lib/action\_controller/benchmarking.rb:69:in  
`perform_action_without_rescue' /usr//lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/rescue.rb:82:in`perform\_action’  
/usr//lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action\_controller/base.rb:408:in  
`send' /usr//lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/base.rb:408:in`process\_without\_filters’  
/usr//lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action\_controller/filters.rb:377:in  
`process_without_session_management_support' /usr//lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/session_management.rb:117:in`process’  
/usr//lib/ruby/gems/1.8/gems/rails-1.1.6/lib/dispatcher.rb:38:in  
`dispatch' /usr//lib/ruby/gems/1.8/gems/rails-1.1.6/lib/webrick_server.rb:115:in`handle\_dispatch’  
/usr//lib/ruby/gems/1.8/gems/rails-1.1.6/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' /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-1.1.6/lib/webrick_server.rb:67:in`dispatch’  
/usr//lib/ruby/gems/1.8/gems/rails-1.1.6/lib/commands/servers/webrick.rb:59  
/usr//lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb:27:in  
`gem_original_require' /usr//lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27: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-1.1.6/lib/commands/server.rb:30 /usr//lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in`gem\_original\_require’  
/usr//lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb:27:in `require' /usr//lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:in`require’  
script/server:3

This error occured while loading the following files:  
quote.rb

* * *

I haven’t a clue what might be wrong. Can anybody suggest something for  
me?

Thanks in advance  
—Michael

---

<div class="post-metadata">

**Author:** ![wickie](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/w/ba9def/32.png) [@wickie](https://www.ruby-forum.com/u/wickie)\
**Post date:** [April 26, 2007, 11:39am UTC](https://www.ruby-forum.com/t/paginate-causes-unitialized-constant-error/92963/2 "2007-04-26T11:39:11Z")

</div>

Michael S. wrote:

> Earlier this week, I posted a question about scaffold causing an  
> unitialized constant. As no one seemed to have any information, I  
> started coding without the scaffolding. I’m now getting the error again.
> 
> In my controller, I started with the following line of code in a list  
> type method:  
> @quotes = Quotes.find :all

Your model “Quotes” is plural, normally models are singular  
(convention)

> This works fine. As there are many quotes in the database, however, I  
> replaced it with the following line:  
> @quote\_pages, @quotes = paginate(:quotes, :order =\> “author”)

I think that paginate follow the convention and convert :quotes in  
model Quote (singular). You can see :singular\_name or :class\_name  
paginate options in  
[http://api.rubyonrails.org/classes/ActionController/Pagination.html#M000130](http://api.rubyonrails.org/classes/ActionController/Pagination.html#M000130)

Regards!