dynamic select list @www.stonemind.net

rubyonrails-talk
1

Hi, Has anyone read the web page by “Adding Dynamic Select Lists to Resource Scaffolding in Rails” at

by Adam Smith. The logic is easy to follow. The codes are easy too.

  I followed the tutorial. I worked thru it twice. I might have misplaced one or two lines of the codes. I got errors and errors. They want us to buy the book. Any advice? regards,

2

Hard to say without knowing errors you have got (and where etc...)

Fred

3

Thank you Fred,

  I copied all the errors below. I am a non-programmer. I don't know what is wrong with line 13 in categories/new.html.erb. The tutorial states that such line is to be inserted into the file in replacing the existing parent form field. The originalfile is shown immediately below:

    <h1>Editing category</h1>

    <%= error_messages_for :category %>

    <% form_for(@category) do |f| %>       <p>        <b>Name</b><br />         <%= f.text_field :name %>       </p>

      <p>         <b>Parent</b><br />         <%= f.text_field :parent_id %>       </p>

      <p>         <%= f.submit "Update" %>       </p>     <% end %>

    <%= link_to 'Show', @category %> |    <%= link_to 'Back', categories_path %> regards,

Errors: Processing CategoriesController#new (for 127.0.0.1 at 2008-04-05 21:54:56) [GET]   Session ID: BAh7BzoMY3NyZl9pZCIlMTgzNGViZDcyNmI3ZmIwMTU5MDk2YWMxYTUwZjVk%0AOTAiCmZsYXNoSUM6J0FjdGlvbkNvbnRyb2xsZXI6OkZsYXNoOjpGbGFzaEhh%0Ac2h7AAY6CkB1c2VkewA%3D--6e8e3ef6b8a0cd94d01e2bfe86ffe0c7a7688f01   Parameters: {"action"=>"new", "controller"=>"categories"}   Category Columns (0.002429) SHOW FIELDS FROM `categories`   Category Load (0.000357) SELECT * FROM `categories` ORDER BY parent_id, name Rendering template within layouts/categories Rendering categories/new

ActionView::TemplateError (Couldn't find template file for categories/_select_category in ["/var/www/test/app/views"]) on line #13 of categories/new.html.erb: 10: 11: <p> 12: <b>Parent</b><br /> 13: <%= render(:partial => "select_category") %> 14: </p> 15: 16: <p>

    /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_view/base.rb:312:in `render_file'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_view/base.rb:331:in `render'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_view/partials.rb:117:in `render_partial'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/benchmarking.rb:26:in `benchmark'     /usr/lib/ruby/1.8/benchmark.rb:293:in `measure'     /usr/lib/ruby/1.8/benchmark.rb:307:in `realtime'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/benchmarking.rb:26:in `benchmark'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_view/partials.rb:116:in `render_partial'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_view/base.rb:352:in `render'     app/views/categories/new.html.erb:13:in `_run_erb_47app47views47categories47new46html46erb'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_view/helpers/form_helper.rb:248:in `fields_for'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_view/helpers/form_helper.rb:184:in `form_for'     app/views/categories/new.html.erb:5:in `_run_erb_47app47views47categories47new46html46erb'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_view/base.rb:637:in `send'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_view/base.rb:637:in `compile_and_render_template'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_view/base.rb:365:in `render_template'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_view/base.rb:316:in `render_file'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/base.rb:1100:in `render_for_file'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/base.rb:858:in `render_with_no_layout'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/base.rb:872:in `render_with_no_layout'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/layout.rb:262:in `render_without_benchmark'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/benchmarking.rb:51:in `render'     /usr/lib/ruby/1.8/benchmark.rb:293:in `measure'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/benchmarking.rb:51:in `render'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/mime_responds.rb:131:in `send'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/mime_responds.rb:131:in `custom'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/mime_responds.rb:156:in `call'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/mime_responds.rb:156:in `respond'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/mime_responds.rb:150:in `each'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/mime_responds.rb:150:in `respond'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/mime_responds.rb:107:in `respond_to'     app/controllers/categories_controller.rb:30:in `new'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/base.rb:1158:in `send'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/base.rb:1158:in `perform_action_without_filters'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/filters.rb:697:in `call_filters'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/filters.rb:689:in `perform_action_without_benchmark'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue'     /usr/lib/ruby/1.8/benchmark.rb:293:in `measure'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/rescue.rb:199:in `perform_action_without_caching'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/caching.rb:678:in `perform_action'     /usr/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/connection_adapters/abstract/query_cache.rb:33:in `cache'     /usr/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/query_cache.rb:8:in `cache'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/caching.rb:677:in `perform_action'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/base.rb:524:in `send'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/base.rb:524:in `process_without_filters'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/filters.rb:685:in `process_without_session_management_support'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/session_management.rb:123:in `process'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/base.rb:388:in `process'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:171:in `handle_request'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:115:in `dispatch'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:126:in `dispatch_cgi'     /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:9:in `dispatch'     /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel/rails.rb:76:in `process'     /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel/rails.rb:74:in `synchronize'     /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel/rails.rb:74:in `process'     /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:159:in `process_client'     /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:158:in `each'     /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:158:in `process_client'     /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:285:in `run'     /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:285:in `initialize'     /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:285:in `new'     /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:285:in `run'     /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:268:in `initialize'     /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:268:in `new'     /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:268:in `run'     /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel/configurator.rb:282:in `run'     /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel/configurator.rb:281:in `each'     /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel/configurator.rb:281:in `run'     /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.4/bin/mongrel_rails:128:in `run'     /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel/command.rb:212:in `run'     /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.4/bin/mongrel_rails:281     /usr/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:489:in `load'     /usr/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:489:in `load'     /usr/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:342:in `new_constants_in'     /usr/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:489:in `load'     /usr/lib/ruby/gems/1.8/gems/rails-2.0.2/lib/commands/servers/mongrel.rb:64     /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require'     /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:27:in `require'     /usr/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496:in `require'     /usr/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:342:in `new_constants_in'     /usr/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496:in `require'     /usr/lib/ruby/gems/1.8/gems/rails-2.0.2/lib/commands/server.rb:39     /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require'     /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:27:in `require'     script/server:3

Rendering /usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/templates/rescues/layout.erb (internal_server_error)

4

Rails is telling you what the problem is. You've told it 'render me the contents of the file _select_category.html.erb' and it's telling you ' I couldn't find that file)

Fred

5

Thank you very very much.

_select_category.html.erb was not there because there was a _select_categories.rhtml.

Ror has been changing all the time.

regards,

6

.rhtml still works, the problem was of course category vs categories.

Fred