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script/generate scaffold News title:string
rake routes вам в помощь ;)
проверено на
Rails 2.2.2

я бы не стал писать в противном случае
map.connect '/news', :controller => 'news', :action => 'index', :method => 'get'
map.connect '/news/new', :controller => 'news', :action => 'new', :method => 'get'
map.connect '/news', :controller => 'news', :action => 'create', :method => 'post'
map.connect '/news/:id', :controller => 'news', :action => 'show', :method => 'get'
map.connect '/news/:id/edit', :controller => 'news', :action => 'edit', :method => 'get'
map.connect '/news/:id', :controller => 'news', :action => 'edit', :method => 'put'
map.connect '/news/:id', :controller => 'news', :action => 'new', :method => 'delete'

это так точно решит ваши проблемы
Ну я выкинул все остальные роуты дефолтные, теперь выдает другую ошибку:

NoMethodError in News#new

Showing app/views/news/new.html.erb where line #3 raised:

undefined method `news_path' for #<ActionView::Base:0xf71c5870>

Extracted source (around line #3):

1: New news
2:
3: <% form_for(@news) do |f| %>
4: <%= f.error_messages %>
5:
6:
$ ruby --version
ruby 1.8.7 (2008-08-11 patchlevel 72) [x86_64-linux]
$ gem --version
1.3.1
$ rails --version
Rails 2.2.2

$ rails -d mysql test

$ cd test/ && rake db:create
$ script/generate scaffold News title:string

warning Plural version of the model detected, using singularized version. Override with --force-plural.
exists app/models/
exists app/controllers/
exists app/helpers/
create app/views/news
exists app/views/layouts/
exists test/functional/
exists test/unit/
exists public/stylesheets/
create app/views/news/index.html.erb
create app/views/news/show.html.erb
create app/views/news/new.html.erb
create app/views/news/edit.html.erb
create app/views/layouts/news.html.erb
create public/stylesheets/scaffold.css
create app/controllers/news_controller.rb
create test/functional/news_controller_test.rb
create app/helpers/news_helper.rb
route map.resources :news
dependency model
exists app/models/
exists test/unit/
exists test/fixtures/
create app/models/news.rb
create test/unit/news_test.rb
create test/fixtures/news.yml
create db/migrate
create db/migrate/20090124224453_create_news.rb

$ rake db:migrate
(in /home/amir/rails/test)
== CreateNews: migrating =====================================================
— create_table(:news)
-> 0.0068s
== CreateNews: migrated (0.0070s) ============================================

$ script/server
=> Booting Mongrel (use 'script/server webrick' to force WEBrick)
=> Rails 2.2.2 application starting on 0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
** Starting Mongrel listening at 0.0.0.0:3000
** Starting Rails with development environment…
** Rails loaded.
** Loading any Rails specific GemPlugins
** Signals ready. TERM => stop. USR2 => restart. INT => stop (no restart).
** Rails signals registered. HUP => reload (without restart). It might not work well.
** Mongrel 1.1.5 available at 0.0.0.0:3000
** Use CTRL-C to stop.

$ curl localhost:3000/news/new

В консоле где запущены рельсы, следюущее:

Processing NewsController#new (for спрятал ip-шник at 2009-01-24 22:46:24) [GET]
SQL (0.1ms) SET NAMES 'utf8'
SQL (0.0ms) SET SQL_AUTO_IS_NULL=0
News Columns (0.7ms) SHOW FIELDS FROM `news`
Rendering template within layouts/news
Rendering news/new

ActionView::TemplateError (news_url failed to generate from {:controller=>«news», :action=>«show»} — you may have ambiguous routes, or you may need to supply additional parameters for this route. content_url has the following required parameters: [«news», :id] — are they all satisfied?) on line #3 of app/views/news/new.html.erb:
1: New news
2:
3: <% form_for(@news) do |f| %>
4: <%= f.error_messages %>
5:
6: /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/routing/route_set.rb:381:in `raise_named_route_error'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/routing/route_set.rb:341:in `generate'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/url_rewriter.rb:208:in `rewrite_path'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/url_rewriter.rb:187:in `rewrite_url'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/url_rewriter.rb:165:in `rewrite'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/base.rb:626:in `url_for'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/helpers/url_helper.rb:85:in `send'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/helpers/url_helper.rb:85:in `url_for'
(eval):16:in `news_path'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/polymorphic_routes.rb:112:in `__send__'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/polymorphic_routes.rb:112:in `polymorphic_url'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/polymorphic_routes.rb:119:in `polymorphic_path'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/helpers/form_helper.rb:269:in `apply_form_for_options!'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/helpers/form_helper.rb:248:in `form_for'
app/views/news/new.html.erb:3
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/renderable.rb:39:in `send'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/renderable.rb:39:in `render'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/template.rb:73:in `render_template'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/base.rb:256:in `render'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/base.rb:367:in `_render_with_layout'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/base.rb:254:in `render'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/base.rb:1174:in `render_for_file'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/base.rb:905:in `render_without_benchmark'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/benchmarking.rb:51:in `render'
/usr/local/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/active_support/core_ext/benchmark.rb:8:in `realtime'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/benchmarking.rb:51:in `render'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/mime_responds.rb:135:in `send'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/mime_responds.rb:135:in `custom'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/mime_responds.rb:160:in `call'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/mime_responds.rb:160:in `respond'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/mime_responds.rb:158:in `each'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/mime_responds.rb:158:in `respond'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/mime_responds.rb:107:in `respond_to'
app/controllers/news_controller.rb:29:in `new'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/base.rb:1253:in `send'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/base.rb:1253:in `perform_action_without_filters'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/filters.rb:617:in `call_filters'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/filters.rb:610:in `perform_action_without_benchmark'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/benchmarking.rb:68: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-2.2.2/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/rescue.rb:136:in `perform_action_without_caching'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/caching/sql_cache.rb:13:in `perform_action'
/usr/local/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/connection_adapters/abstract/query_cache.rb:34:in `cache'
/usr/local/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/query_cache.rb:8:in `cache'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/caching/sql_cache.rb:12:in `perform_action'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/base.rb:524:in `send'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/base.rb:524:in `process_without_filters'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/filters.rb:606:in `process_without_session_management_support'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/session_management.rb:134:in `process'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/base.rb:392:in `process'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/dispatcher.rb:183:in `handle_request'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/dispatcher.rb:110:in `dispatch_unlocked'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/dispatcher.rb:123:in `dispatch'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/dispatcher.rb:122:in `synchronize'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/dispatcher.rb:122:in `dispatch'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/dispatcher.rb:132:in `dispatch_cgi'
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/dispatcher.rb:39:in `dispatch'
/usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/rails.rb:76:in `process'
/usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/rails.rb:74:in `synchronize'
/usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/rails.rb:74:in `process'
/usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:159:in `process_client'
/usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:158:in `each'
/usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:158:in `process_client'
/usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:285:in `run'
/usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:285:in `initialize'
/usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:285:in `new'
/usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:285:in `run'
/usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:268:in `initialize'
/usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:268:in `new'
/usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:268:in `run'
/usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/configurator.rb:282:in `run'
/usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/configurator.rb:281:in `each'
/usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/configurator.rb:281:in `run'
/usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/mongrel_rails:128:in `run'
/usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/command.rb:212:in `run'
/usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/mongrel_rails:281
/usr/local/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/active_support/dependencies.rb:142:in `load_without_new_constant_marking'
/usr/local/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/active_support/dependencies.rb:142:in `load'
/usr/local/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/active_support/dependencies.rb:521:in `new_constants_in'
/usr/local/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/active_support/dependencies.rb:142:in `load'
/usr/local/lib/ruby/gems/1.8/gems/rails-2.2.2/lib/commands/servers/mongrel.rb:64
/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
/usr/local/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/active_support/dependencies.rb:153:in `require'
/usr/local/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/active_support/dependencies.rb:521:in `new_constants_in'
/usr/local/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/active_support/dependencies.rb:153:in `require'
/usr/local/lib/ruby/gems/1.8/gems/rails-2.2.2/lib/commands/server.rb:49
/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
script/server:3

НЛО прилетело и опубликовало эту надпись здесь
ну news он и так не сможет просколнять, я пробовал добавлением :singular => 'news_instance'
и даже удачно заменил некоторые ссылки, но возникала проблема построения ссылки к списку новостей
не, ничего не помогает, на чем-то в итоге валится, даже если я переписываю все на news_instance в итоге ломается метод edit
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