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Vladimir Kurnavenkov

2006-Aug-15 06:33 UTC

[Rails] ActiveRecord inheritance

Hello,
I got the following issue and I do not know how to resolve it:
#1. created parent class (AccountExtended) for some my models 
(lib/classes_lib.rb):
  class AccountExtended < ActiveRecord::Base
    def self.findByAccount
    end
  end

#2. created model Country:
require ''lib/classes_lib''
class Country < AccountExtended
end

#3.  and added a test controller what shows an issue (view_controller.rb):
class ViewController < ApplicationController
  def index
    @countries = Country.find(:all)
  end
end

index.rhtml:
<table>
<% @countries.each do |c| -%>
  <tr><td><%= c.full_name %></td></tr>
<% end -%>
</table>

(it is simply a skeleton)

then I start webrick, refresh page in my browser and see countries list.
After second refresh a browser''s page I get:
------------------------------------------------------


  NameError in ViewController#index

uninitialized constant AccountExtended

|RAILS_ROOT: script/../config/..|

Application Trace <http://localhost:3000/view#> | Framework Trace 
<http://localhost:3000/view#> | Full Trace
<http://localhost:3000/view#>

|/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:123:in
`const_missing''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:131:in
`const_missing''
#{RAILS_ROOT}/app/models/country.rb:2
app/controllers/view_controller.rb:3:in `index''|

|/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:123:in
`const_missing''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:131:in
`const_missing''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:140:in
`load''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:56:in
`require_or_load''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:30:in
`depend_on''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:85:in
`require_dependency''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:98:in
`const_missing''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:131:in
`const_missing''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:133:in
`const_missing''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/base.rb:941:in
`perform_action_without_filters''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/filters.rb:368:in
`perform_action_without_benchmark''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/benchmarking.rb:69:in
`perform_action_without_rescue''
/usr/local/lib/ruby/1.8/benchmark.rb:293:in `measure''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/benchmarking.rb:69:in
`perform_action_without_rescue''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/rescue.rb:82:in
`perform_action''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/base.rb:408:in
`process_without_filters''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/filters.rb:377:in
`process_without_session_management_support''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/session_management.rb:117:in
`process''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/dispatcher.rb:38:in
`dispatch''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/webrick_server.rb:115:in
`handle_dispatch''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/webrick_server.rb:81:in
`service''
/usr/local/lib/ruby/1.8/webrick/httpserver.rb:104:in `service''
/usr/local/lib/ruby/1.8/webrick/httpserver.rb:65:in `run''
/usr/local/lib/ruby/1.8/webrick/server.rb:173:in `start_thread''
/usr/local/lib/ruby/1.8/webrick/server.rb:162:in `start_thread''
/usr/local/lib/ruby/1.8/webrick/server.rb:95:in `start''
/usr/local/lib/ruby/1.8/webrick/server.rb:92:in `start''
/usr/local/lib/ruby/1.8/webrick/server.rb:23:in `start''
/usr/local/lib/ruby/1.8/webrick/server.rb:82:in `start''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/webrick_server.rb:67:in
`dispatch''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/commands/servers/webrick.rb:59
/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in
`require''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:in
`require''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/commands/server.rb:30
/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in
`require''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:in
`require''
script/server:3|

|/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:123:in
`const_missing''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:131:in
`const_missing''
#{RAILS_ROOT}/app/models/country.rb:2
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:140:in
`load''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:56:in
`require_or_load''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:30:in
`depend_on''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:85:in
`require_dependency''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:98:in
`const_missing''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:131:in
`const_missing''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:133:in
`const_missing''
app/controllers/view_controller.rb:3:in `index''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/base.rb:941:in
`perform_action_without_filters''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/filters.rb:368:in
`perform_action_without_benchmark''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/benchmarking.rb:69:in
`perform_action_without_rescue''
/usr/local/lib/ruby/1.8/benchmark.rb:293:in `measure''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/benchmarking.rb:69:in
`perform_action_without_rescue''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/rescue.rb:82:in
`perform_action''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/base.rb:408:in
`process_without_filters''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/filters.rb:377:in
`process_without_session_management_support''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/session_management.rb:117:in
`process''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/dispatcher.rb:38:in
`dispatch''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/webrick_server.rb:115:in
`handle_dispatch''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/webrick_server.rb:81:in
`service''
/usr/local/lib/ruby/1.8/webrick/httpserver.rb:104:in `service''
/usr/local/lib/ruby/1.8/webrick/httpserver.rb:65:in `run''
/usr/local/lib/ruby/1.8/webrick/server.rb:173:in `start_thread''
/usr/local/lib/ruby/1.8/webrick/server.rb:162:in `start_thread''
/usr/local/lib/ruby/1.8/webrick/server.rb:95:in `start''
/usr/local/lib/ruby/1.8/webrick/server.rb:92:in `start''
/usr/local/lib/ruby/1.8/webrick/server.rb:23:in `start''
/usr/local/lib/ruby/1.8/webrick/server.rb:82:in `start''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/webrick_server.rb:67:in
`dispatch''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/commands/servers/webrick.rb:59
/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in
`require''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:in
`require''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/commands/server.rb:30
/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in
`require''
/usr/local/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:
   country.rb
   account_extended.rb
---------------------------------------
|

Please, can anybody explain me what I do wrongly ?
Thanks.

-- 
Vladimir Kurnavenkov


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Michael Siebert

2006-Aug-15 06:52 UTC

head link

[Rails] ActiveRecord inheritance

just put your AR model in /app/models. at least that works for me (i
didn''t
try it otherwise, though)

2006/8/15, Vladimir Kurnavenkov
<vladimir@psoft.od.ua>:>
> Hello,
> I got the following issue and I do not know how to resolve it:
> #1. created parent class (AccountExtended) for some my models
> (lib/classes_lib.rb):
>   class AccountExtended < ActiveRecord::Base
>     def self.findByAccount
>     end
>   end
>
> #2. created model Country:
> require ''lib/classes_lib''
> class Country < AccountExtended
> end
>
> #3.  and added a test controller what shows an issue (view_controller.rb):
> class ViewController < ApplicationController
>   def index
>     @countries = Country.find(:all)
>   end
> end
>
> index.rhtml:
> <table>
> <% @countries.each do |c| -%>
>   <tr><td><%= c.full_name %></td></tr>
> <% end -%>
> </table>
>
> (it is simply a skeleton)
>
> then I start webrick, refresh page in my browser and see countries list.
> After second refresh a browser''s page I get:
> ------------------------------------------------------
>
>
>   NameError in ViewController#index
>
> uninitialized constant AccountExtended
>
> |RAILS_ROOT: script/../config/..|
>
> Application Trace <http://localhost:3000/view#> | Framework Trace
> <http://localhost:3000/view#> | Full Trace
<http://localhost:3000/view#>
>
>
|/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:123:in
> `const_missing''
>
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:131:in
> `const_missing''
> #{RAILS_ROOT}/app/models/country.rb:2
> app/controllers/view_controller.rb:3:in `index''|
>
>
|/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:123:in
> `const_missing''
>
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:131:in
> `const_missing''
>
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:140:in
> `load''
>
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:56:in
> `require_or_load''
>
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:30:in
> `depend_on''
>
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:85:in
> `require_dependency''
>
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:98:in
> `const_missing''
>
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:131:in
> `const_missing''
>
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:133:in
> `const_missing''
>
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/base.rb:941:in
> `perform_action_without_filters''
>
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/filters.rb:368:in
> `perform_action_without_benchmark''
>
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/benchmarking.rb:69:in
> `perform_action_without_rescue''
> /usr/local/lib/ruby/1.8/benchmark.rb:293:in `measure''
>
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/benchmarking.rb:69:in
> `perform_action_without_rescue''
>
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/rescue.rb:82:in
> `perform_action''
>
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/base.rb:408:in
> `process_without_filters''
>
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/filters.rb:377:in
> `process_without_session_management_support''
>
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/session_management.rb:117:in
> `process''
> /usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/dispatcher.rb:38:in
> `dispatch''
> /usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/webrick_server.rb:115:in
> `handle_dispatch''
> /usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/webrick_server.rb:81:in
> `service''
> /usr/local/lib/ruby/1.8/webrick/httpserver.rb:104:in `service''
> /usr/local/lib/ruby/1.8/webrick/httpserver.rb:65:in `run''
> /usr/local/lib/ruby/1.8/webrick/server.rb:173:in `start_thread''
> /usr/local/lib/ruby/1.8/webrick/server.rb:162:in `start_thread''
> /usr/local/lib/ruby/1.8/webrick/server.rb:95:in `start''
> /usr/local/lib/ruby/1.8/webrick/server.rb:92:in `start''
> /usr/local/lib/ruby/1.8/webrick/server.rb:23:in `start''
> /usr/local/lib/ruby/1.8/webrick/server.rb:82:in `start''
> /usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/webrick_server.rb:67:in
> `dispatch''
> /usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6
> /lib/commands/servers/webrick.rb:59
> /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in
> `require''
>
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:in
> `require''
> /usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/commands/server.rb:30
> /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in
> `require''
>
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:in
> `require''
> script/server:3|
>
>
|/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:123:in
> `const_missing''
>
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:131:in
> `const_missing''
> #{RAILS_ROOT}/app/models/country.rb:2
>
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:140:in
> `load''
>
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:56:in
> `require_or_load''
>
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:30:in
> `depend_on''
>
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:85:in
> `require_dependency''
>
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:98:in
> `const_missing''
>
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:131:in
> `const_missing''
>
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:133:in
> `const_missing''
> app/controllers/view_controller.rb:3:in `index''
>
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/base.rb:941:in
> `perform_action_without_filters''
>
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/filters.rb:368:in
> `perform_action_without_benchmark''
>
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/benchmarking.rb:69:in
> `perform_action_without_rescue''
> /usr/local/lib/ruby/1.8/benchmark.rb:293:in `measure''
>
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/benchmarking.rb:69:in
> `perform_action_without_rescue''
>
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/rescue.rb:82:in
> `perform_action''
>
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/base.rb:408:in
> `process_without_filters''
>
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/filters.rb:377:in
> `process_without_session_management_support''
>
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/session_management.rb:117:in
> `process''
> /usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/dispatcher.rb:38:in
> `dispatch''
> /usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/webrick_server.rb:115:in
> `handle_dispatch''
> /usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/webrick_server.rb:81:in
> `service''
> /usr/local/lib/ruby/1.8/webrick/httpserver.rb:104:in `service''
> /usr/local/lib/ruby/1.8/webrick/httpserver.rb:65:in `run''
> /usr/local/lib/ruby/1.8/webrick/server.rb:173:in `start_thread''
> /usr/local/lib/ruby/1.8/webrick/server.rb:162:in `start_thread''
> /usr/local/lib/ruby/1.8/webrick/server.rb:95:in `start''
> /usr/local/lib/ruby/1.8/webrick/server.rb:92:in `start''
> /usr/local/lib/ruby/1.8/webrick/server.rb:23:in `start''
> /usr/local/lib/ruby/1.8/webrick/server.rb:82:in `start''
> /usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/webrick_server.rb:67:in
> `dispatch''
> /usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6
> /lib/commands/servers/webrick.rb:59
> /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in
> `require''
>
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:in
> `require''
> /usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/commands/server.rb:30
> /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in
> `require''
>
/usr/local/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:
>    country.rb
>    account_extended.rb
> ---------------------------------------
> |
>
> Please, can anybody explain me what I do wrongly ?
> Thanks.
>
> --
> Vladimir Kurnavenkov
>
>
>
>
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>
>
>
>

-- 
Michael Siebert <info@siebert-wd.de>

www.stellar-legends.de - Weltraum-Browsergame im Alpha-Stadium
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Vladimir Kurnavenkov

2006-Aug-15 07:03 UTC

head link

[Rails] ActiveRecord inheritance

Michael Siebert wrote:
> just put your AR model in /app/models. at least that works for me (i 
> didn''t try it otherwise, though)
I have moved classes_lib.rb to /app/models, modified ''require''
and got
the same error message :(
>
> 2006/8/15, Vladimir Kurnavenkov <vladimir@psoft.od.ua 
> <mailto:vladimir@psoft.od.ua>>:
>
>     Hello,
>     I got the following issue and I do not know how to resolve it:
>     #1. created parent class (AccountExtended) for some my models
>     (lib/classes_lib.rb):
>       class AccountExtended < ActiveRecord::Base
>         def self.findByAccount
>         end
>       end
>
>     #2. created model Country:
>     require ''lib/classes_lib''
>     class Country < AccountExtended
>     end
>
>     #3.  and added a test controller what shows an issue
>     (view_controller.rb):
>     class ViewController < ApplicationController
>       def index
>         @countries = Country.find(:all)
>       end
>     end
>
>     index.rhtml:
>     <table>
>     <% @countries.each do |c| -%>
>       <tr><td><%= c.full_name %></td></tr>
>     <% end -%>
>     </table>
>
>     (it is simply a skeleton)
>
>     then I start webrick, refresh page in my browser and see countries
>     list.
>     After second refresh a browser''s page I get:
>     ------------------------------------------------------
>
>
>       NameError in ViewController#index
>
>     uninitialized constant AccountExtended
>
>     |RAILS_ROOT: script/../config/..|
>
>     Application Trace <http://localhost:3000/view#
>     <http://localhost:3000/view#>> | Framework Trace
>     <http://localhost:3000/view#> | Full Trace
>     <http://localhost:3000/view#>
>
>     |/usr/local/lib/ruby/gems/1.8/gems/activesupport-
>     1.3.1/lib/active_support/dependencies.rb:123:in
`const_missing''
>    
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:131:in
>     `const_missing''
>     #{RAILS_ROOT}/app/models/country.rb:2
>     app/controllers/view_controller.rb:3:in `index''|
>
>    
|/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:123:in
>     `const_missing''
>     /usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1
>     /lib/active_support/dependencies.rb:131:in `const_missing''
>    
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:140:in
>     `load''
>     /usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1
>     /lib/active_support/dependencies.rb:56:in `require_or_load''
>    
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:30:in
>     `depend_on''
>     /usr/local/lib/ruby/gems/1.8/gems/activesupport-
>     1.3.1/lib/active_support/dependencies.rb:85:in
`require_dependency''
>    
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:98:in
>     `const_missing''
>     /usr/local/lib/ruby/gems/1.8/gems/activesupport-
>     1.3.1/lib/active_support/dependencies.rb:131:in
`const_missing''
>    
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:133:in
>     `const_missing''
>     /usr/local/lib/ruby/gems/1.8/gems/actionpack-
>     1.12.5/lib/action_controller/base.rb:941:in
>     `perform_action_without_filters''
>    
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/filters.rb:368:in
>     `perform_action_without_benchmark''
>     /usr/local/lib/ruby/gems/1.8/gems/actionpack-
>     1.12.5/lib/action_controller/benchmarking.rb:69:in
>     `perform_action_without_rescue''
>     /usr/local/lib/ruby/1.8/benchmark.rb:293:in `measure''
>    
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/benchmarking.rb:69:in
>     `perform_action_without_rescue''
>    
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/rescue.rb:82:in
>     `perform_action''
>    
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/base.rb:408:in
>     `process_without_filters''
>    
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/filters.rb:377:in
>     `process_without_session_management_support''
>    
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/session_management.rb:117:in
>     `process''
>     /usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/dispatcher.rb:38:in
>     `dispatch''
>    
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/webrick_server.rb:115:in
>     `handle_dispatch''
>     /usr/local/lib/ruby/gems/1.8/gems/rails-
>     1.1.6/lib/webrick_server.rb:81:in `service''
>     /usr/local/lib/ruby/1.8/webrick/httpserver.rb:104:in `service''
>     /usr/local/lib/ruby/1.8/webrick/httpserver.rb:65:in `run''
>     /usr/local/lib/ruby/1.8/webrick/server.rb:173:in
`start_thread''
>     /usr/local/lib/ruby/1.8/webrick/server.rb:162:in
`start_thread''
>     /usr/local/lib/ruby/1.8/webrick/server.rb:95:in `start''
>     /usr/local/lib/ruby/1.8/webrick/server.rb:92:in `start''
>     /usr/local/lib/ruby/1.8/webrick/server.rb:23:in `start''
>     /usr/local/lib/ruby/1.8/webrick/server.rb:82:in `start''
>    
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/webrick_server.rb:67:in
>     `dispatch''
>    
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/commands/servers/webrick.rb:59
>
>     /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in
>     `require''
>    
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:in
>     `require''
>     /usr/local/lib/ruby/gems/1.8/gems/rails-
>     1.1.6/lib/commands/server.rb:30
>     /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in
>     `require''
>    
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:in
>     `require''
>     script/server:3|
>
>    
|/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:123:in
>     `const_missing''
>    
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:131:in
>     `const_missing''
>     #{RAILS_ROOT}/app/models/country.rb:2
>    
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:140:in
>     `load''
>    
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:56:in
>     `require_or_load''
>    
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:30:in
>     `depend_on''
>    
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:85:in
>     `require_dependency''
>    
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:98:in
>     `const_missing''
>    
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:131:in
>     `const_missing''
>    
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:133:in
>     `const_missing''
>     app/controllers/view_controller.rb:3:in `index''
>     /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5
>     /lib/action_controller/base.rb:941:in
`perform_action_without_filters''
>    
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/filters.rb:368:in
>     `perform_action_without_benchmark''
>     /usr/local/lib/ruby/gems/1.8/gems/actionpack-
>     1.12.5/lib/action_controller/benchmarking.rb:69:in
>     `perform_action_without_rescue''
>     /usr/local/lib/ruby/1.8/benchmark.rb:293:in `measure''
>    
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/benchmarking.rb:69:in
>     `perform_action_without_rescue''
>    
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/rescue.rb:82:in
>     `perform_action''
>    
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/base.rb:408:in
>     `process_without_filters''
>    
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/filters.rb:377:in
>     `process_without_session_management_support''
>    
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/session_management.rb:117:in
>     `process''
>     /usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/dispatcher.rb:38:in
>     `dispatch''
>    
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/webrick_server.rb:115:in
>     `handle_dispatch''
>     /usr/local/lib/ruby/gems/1.8/gems/rails-
>     1.1.6/lib/webrick_server.rb:81:in `service''
>     /usr/local/lib/ruby/1.8/webrick/httpserver.rb:104:in `service''
>     /usr/local/lib/ruby/1.8/webrick/httpserver.rb:65:in `run''
>     /usr/local/lib/ruby/1.8/webrick/server.rb:173:in
`start_thread''
>     /usr/local/lib/ruby/1.8/webrick/server.rb:162:in
`start_thread''
>     /usr/local/lib/ruby/1.8/webrick/server.rb:95:in `start''
>     /usr/local/lib/ruby/1.8/webrick/server.rb:92:in `start''
>     /usr/local/lib/ruby/1.8/webrick/server.rb:23:in `start''
>     /usr/local/lib/ruby/1.8/webrick/server.rb:82:in `start''
>    
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/webrick_server.rb:67:in
>     `dispatch''
>    
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/commands/servers/webrick.rb:59
>
>     /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in
>     `require''
>    
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:in
>     `require''
>     /usr/local/lib/ruby/gems/1.8/gems/rails-
>     1.1.6/lib/commands/server.rb:30
>     /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in
>     `require''
>    
/usr/local/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:
>        country.rb
>        account_extended.rb
>     ---------------------------------------
>     |
>
>     Please, can anybody explain me what I do wrongly ?
>     Thanks.
>
>     --
>     Vladimir Kurnavenkov
>
>
>
>
>     _______________________________________________
>     Rails mailing list
>     Rails@lists.rubyonrails.org <mailto:Rails@lists.rubyonrails.org>
>     http://lists.rubyonrails.org/mailman/listinfo/rails
>
>
>
>
>
>
> -- 
> Michael Siebert <info@siebert-wd.de
<mailto:info@siebert-wd.de>>
>
> www.stellar-legends.de <http://www.stellar-legends.de> - 
> Weltraum-Browsergame im Alpha-Stadium
>
>------------------------------------------------------------------------
>
>_______________________________________________
>Rails mailing list
>Rails@lists.rubyonrails.org
>http://lists.rubyonrails.org/mailman/listinfo/rails
>  
>

-- 
Vladimir Kurnavenkov


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Vladimir Kurnavenkov

2006-Aug-15 09:07 UTC

head link

[Rails] ActiveRecord inheritance

Vladimir Kurnavenkov wrote:
> Michael Siebert wrote:
>
>> just put your AR model in /app/models. at least that works for me (i 
>> didn''t try it otherwise, though)
>
>
> I have moved classes_lib.rb to /app/models, modified
''require'' and got
> the same error message :(
I have renamed classes_lib.rb -> app/models/account_extended.rb and now 
it is working :)
but it is very strangely....
>
>>
>> 2006/8/15, Vladimir Kurnavenkov <vladimir@psoft.od.ua 
>> <mailto:vladimir@psoft.od.ua>>:
>>
>>     Hello,
>>     I got the following issue and I do not know how to resolve it:
>>     #1. created parent class (AccountExtended) for some my models
>>     (lib/classes_lib.rb):
>>       class AccountExtended < ActiveRecord::Base
>>         def self.findByAccount
>>         end
>>       end
>>
>>     #2. created model Country:
>>     require ''lib/classes_lib''
>>     class Country < AccountExtended
>>     end
>>
>>     #3.  and added a test controller what shows an issue
>>     (view_controller.rb):
>>     class ViewController < ApplicationController
>>       def index
>>         @countries = Country.find(:all)
>>       end
>>     end
>>
>>     index.rhtml:
>>     <table>
>>     <% @countries.each do |c| -%>
>>       <tr><td><%= c.full_name
%></td></tr>
>>     <% end -%>
>>     </table>
>>
>>     (it is simply a skeleton)
>>
>>     then I start webrick, refresh page in my browser and see countries
>>     list.
>>     After second refresh a browser''s page I get:
>>     ------------------------------------------------------
>>
>>
>>       NameError in ViewController#index
>>
>>     uninitialized constant AccountExtended
>>
>>     |RAILS_ROOT: script/../config/..|
>>
>>     Application Trace <http://localhost:3000/view#
>>     <http://localhost:3000/view#>> | Framework Trace
>>
>>     |This error occured while loading the following files:
>>        country.rb
>>        account_extended.rb
>>     ---------------------------------------
>>     |
>>
>>     Please, can anybody explain me what I do wrongly ?
>>     Thanks.
>>
>>     --
>>     Vladimir Kurnavenkov
>>
>>
>>
>>
>>     _______________________________________________
>>     Rails mailing list
>>     Rails@lists.rubyonrails.org
<mailto:Rails@lists.rubyonrails.org>
>>     http://lists.rubyonrails.org/mailman/listinfo/rails
>>
>>
>>
>>
>>
>>
>> -- 
>> Michael Siebert <info@siebert-wd.de
<mailto:info@siebert-wd.de>>
>>
>> www.stellar-legends.de <http://www.stellar-legends.de> - 
>> Weltraum-Browsergame im Alpha-Stadium
>>
>>
------------------------------------------------------------------------
>>
>> _______________________________________________
>> Rails mailing list
>> Rails@lists.rubyonrails.org
>> http://lists.rubyonrails.org/mailman/listinfo/rails
>>  
>>
>
>
>------------------------------------------------------------------------
>
>_______________________________________________
>Rails mailing list
>Rails@lists.rubyonrails.org
>http://lists.rubyonrails.org/mailman/listinfo/rails
>  
>

-- 
Vladimir Kurnavenkov


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Michael Siebert

2006-Aug-15 10:57 UTC

head link

[Rails] ActiveRecord inheritance

now i know what went wrong...
rails makes some assupmtions about class- and filenames. one is: a file in
models camelized => model classname. so if the autoloader encounters a
unknown classname (=constant), it knows in which file it finds that class.
if it isnt there or has another name, it fails.

2006/8/15, Vladimir Kurnavenkov
<vladimir@psoft.od.ua>:>
> Vladimir Kurnavenkov wrote:
>
> > Michael Siebert wrote:
> >
> >> just put your AR model in /app/models. at least that works for me
(i
> >> didn''t try it otherwise, though)
> >
> >
> > I have moved classes_lib.rb to /app/models, modified
''require'' and got
> > the same error message :(
>
> I have renamed classes_lib.rb -> app/models/account_extended.rb and now
> it is working :)
> but it is very strangely....
>
> >
> >>
> >> 2006/8/15, Vladimir Kurnavenkov <vladimir@psoft.od.ua
> >> <mailto:vladimir@psoft.od.ua>>:
> >>
> >>     Hello,
> >>     I got the following issue and I do not know how to resolve it:
> >>     #1. created parent class (AccountExtended) for some my models
> >>     (lib/classes_lib.rb):
> >>       class AccountExtended < ActiveRecord::Base
> >>         def self.findByAccount
> >>         end
> >>       end
> >>
> >>     #2. created model Country:
> >>     require ''lib/classes_lib''
> >>     class Country < AccountExtended
> >>     end
> >>
> >>     #3.  and added a test controller what shows an issue
> >>     (view_controller.rb):
> >>     class ViewController < ApplicationController
> >>       def index
> >>         @countries = Country.find(:all)
> >>       end
> >>     end
> >>
> >>     index.rhtml:
> >>     <table>
> >>     <% @countries.each do |c| -%>
> >>       <tr><td><%= c.full_name
%></td></tr>
> >>     <% end -%>
> >>     </table>
> >>
> >>     (it is simply a skeleton)
> >>
> >>     then I start webrick, refresh page in my browser and see
countries
> >>     list.
> >>     After second refresh a browser''s page I get:
> >>     ------------------------------------------------------
> >>
> >>
> >>       NameError in ViewController#index
> >>
> >>     uninitialized constant AccountExtended
> >>
> >>     |RAILS_ROOT: script/../config/..|
> >>
> >>     Application Trace <http://localhost:3000/view#
> >>     <http://localhost:3000/view#>> | Framework Trace
> >>
> >>     |This error occured while loading the following files:
> >>        country.rb
> >>        account_extended.rb
> >>     ---------------------------------------
> >>     |
> >>
> >>     Please, can anybody explain me what I do wrongly ?
> >>     Thanks.
> >>
> >>     --
> >>     Vladimir Kurnavenkov
> >>
> >>
> >>
> >>
> >>     _______________________________________________
> >>     Rails mailing list
> >>     Rails@lists.rubyonrails.org
<mailto:Rails@lists.rubyonrails.org>
> >>     http://lists.rubyonrails.org/mailman/listinfo/rails
> >>
> >>
> >>
> >>
> >>
> >>
> >> --
> >> Michael Siebert <info@siebert-wd.de
<mailto:info@siebert-wd.de>>
> >>
> >> www.stellar-legends.de <http://www.stellar-legends.de> -
> >> Weltraum-Browsergame im Alpha-Stadium
> >>
> >>
> ------------------------------------------------------------------------
> >>
> >> _______________________________________________
> >> Rails mailing list
> >> Rails@lists.rubyonrails.org
> >> http://lists.rubyonrails.org/mailman/listinfo/rails
> >>
> >>
> >
> >
>
>------------------------------------------------------------------------
> >
> >_______________________________________________
> >Rails mailing list
> >Rails@lists.rubyonrails.org
> >http://lists.rubyonrails.org/mailman/listinfo/rails
> >
> >
>
>
> --
> Vladimir Kurnavenkov
>
>
>
>
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>
>
>
>

-- 
Michael Siebert <info@siebert-wd.de>

www.stellar-legends.de - Weltraum-Browsergame im Alpha-Stadium
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Vladimir Kurnavenkov

2006-Aug-16 06:00 UTC

head link

[Rails] ActiveRecord inheritance

Michael Siebert wrote:> now i know what went wrong...
> rails makes some assupmtions about class- and filenames. one is: a 
> file in models camelized => model classname. so if the autoloader 
> encounters a unknown classname (=constant), it knows in which file it 
> finds that class. if it isnt there or has another name, it fails.but when request is processed at the first time all is right: rails 
loads necessary library (require ''classes_lib'') and returns a
correct
response.
interestingly, why at the second time loading is not working: may be it 
decided library had been already loaded but constant (class name) is not 
defined and it tries to load library with default name (based on 
constant/class name) ?>
> 2006/8/15, Vladimir Kurnavenkov <vladimir@psoft.od.ua 
> <mailto:vladimir@psoft.od.ua>>:
>
>     Vladimir Kurnavenkov wrote:
>
>     > Michael Siebert wrote:
>     >
>     >> just put your AR model in /app/models. at least that works for
>     me (i
>     >> didn''t try it otherwise, though)
>     >
>     >
>     > I have moved classes_lib.rb to /app/models, modified
''require''
>     and got
>     > the same error message :(
>
>     I have renamed classes_lib.rb -> app/models/account_extended.rb
>     and now
>     it is working :)
>     but it is very strangely....
>
>     >
>     >>
>     >> 2006/8/15, Vladimir Kurnavenkov < vladimir@psoft.od.ua
>     <mailto:vladimir@psoft.od.ua>
>     >> <mailto:vladimir@psoft.od.ua
<mailto:vladimir@psoft.od.ua>>>:
>     >>
>     >>     Hello,
>     >>     I got the following issue and I do not know how to resolve
it:
>     >>     #1. created parent class (AccountExtended) for some my
models
>     >>     (lib/classes_lib.rb):
>     >>       class AccountExtended < ActiveRecord::Base
>     >>         def self.findByAccount
>     >>         end
>     >>       end
>     >>
>     >>     #2. created model Country:
>     >>     require ''lib/classes_lib''
>     >>     class Country < AccountExtended
>     >>     end
>     >>
>     >>     #3.  and added a test controller what shows an issue
>     >>     (view_controller.rb):
>     >>     class ViewController < ApplicationController
>     >>       def index
>     >>         @countries = Country.find(:all)
>     >>       end
>     >>     end
>     >>
>     >>     index.rhtml:
>     >>     <table>
>     >>     <% @countries.each do |c| -%>
>     >>       <tr><td><%= c.full_name
%></td></tr>
>     >>     <% end -%>
>     >>     </table>
>     >>
>     >>     (it is simply a skeleton)
>     >>
>     >>     then I start webrick, refresh page in my browser and see
>     countries
>     >>     list.
>     >>     After second refresh a browser''s page I get:
>     >>     ------------------------------------------------------
>     >>
>     >>
>     >>       NameError in ViewController#index
>     >>
>     >>     uninitialized constant AccountExtended
>     >>
>     >>     |RAILS_ROOT: script/../config/..|
>     >>
>     >>     Application Trace <http://localhost:3000/view#
>     <http://localhost:3000/view#>
>     >>     <http://localhost:3000/view#>> | Framework Trace
>     >>
>     >>     |This error occured while loading the following files:
>     >>         country.rb
>     >>        account_extended.rb
>     >>     ---------------------------------------
>     >>     |
>     >>
>     >>     Please, can anybody explain me what I do wrongly ?
>     >>     Thanks.
>     >>
>     >>     --
>     >>     Vladimir Kurnavenkov
>     >>
>     >>
>     >>
>     >>
>     >>     _______________________________________________
>     >>     Rails mailing list
>     >>     Rails@lists.rubyonrails.org
>     <mailto:Rails@lists.rubyonrails.org>
>     <mailto:Rails@lists.rubyonrails.org
>     <mailto:Rails@lists.rubyonrails.org>>
>     >>     http://lists.rubyonrails.org/mailman/listinfo/rails
>     >>
>     >>
>     >>
>     >>
>     >>
>     >>
>     >> --
>     >> Michael Siebert <info@siebert-wd.de
<mailto:info@siebert-wd.de>
>     <mailto:info@siebert-wd.de <mailto:info@siebert-wd.de>>>
>     >>
>     >> www.stellar-legends.de <http://www.stellar-legends.de>
>     <http://www.stellar-legends.de
<http://www.stellar-legends.de>> -
>     >> Weltraum-Browsergame im Alpha-Stadium
>     >>
>     >>
>    
------------------------------------------------------------------------
>     >>
>     >> _______________________________________________
>     >> Rails mailing list
>     >> Rails@lists.rubyonrails.org
<mailto:Rails@lists.rubyonrails.org>
>     >> http://lists.rubyonrails.org/mailman/listinfo/rails
>     <http://lists.rubyonrails.org/mailman/listinfo/rails>
>     >>
>     >>
>     >
>     >
>    
>------------------------------------------------------------------------
>     >
>     >_______________________________________________
>     >Rails mailing list
>     > Rails@lists.rubyonrails.org
<mailto:Rails@lists.rubyonrails.org>
>     >http://lists.rubyonrails.org/mailman/listinfo/rails
>     >
>     >
>
>
>     --
>     Vladimir Kurnavenkov
>
>
>
>
>     _______________________________________________
>     Rails mailing list
>     Rails@lists.rubyonrails.org <mailto:Rails@lists.rubyonrails.org>
>     http://lists.rubyonrails.org/mailman/listinfo/rails
>
>
>
>
>
>
> -- 
> Michael Siebert <info@siebert-wd.de
<mailto:info@siebert-wd.de>>
>
> www.stellar-legends.de <http://www.stellar-legends.de> - 
> Weltraum-Browsergame im Alpha-Stadium
> ------------------------------------------------------------------------
>
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>   

-- 
Vladimir Kurnavenkov


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