Dynamic select list @www.stonemind.net

Rails
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

On Apr 5, 2:29 pm, Dror C. [email protected]
wrote:

Hi,
Has anyone read the web page by “Adding Dynamic Select Lists to
Resource Scaffolding in Rails” athttp://www.stonemind.net/blog/2007/09/26/adding-dynamic-select-lists-…
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,

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:


12: Parent

13: <%= render(:partial => “select_category”) %>
14:


15:
16: 

/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:inrender’
/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:inbenchmark’
/usr/lib/ruby/1.8/benchmark.rb:293:in measure' /usr/lib/ruby/1.8/benchmark.rb:307:inrealtime’
/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:inrender_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:inform_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:insend’
/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:inrender_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:inrender_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:inrender_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:inrender’
/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:inrender’
/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:incustom’
/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:inrespond’
/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:inrespond’
/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:innew’
/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:inperform_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:inperform_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:inmeasure’
/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:inperform_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:incache’
/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:inperform_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:inprocess_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:inprocess’
/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:inhandle_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:indispatch_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:inprocess’
/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:inprocess’
/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:ineach’
/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:inrun’
/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:innew’
/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:ininitialize’
/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:inrun’
/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:ineach’
/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:inrun’
/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:inload’
/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:innew_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:ingem_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:inrequire’
/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:inrequire’
/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:inrequire’
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

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,

5

On Apr 5, 3:09 pm, Dror C. [email protected]
wrote:

14:


15:
16:

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

6

On Apr 5, 3:59 pm, Dror C. [email protected]
wrote:

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.

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

Fred