what's wrong with this code? (hitting my head against a wall)

Hi,

I'm just trying to load a set of options which doesn't require tables
(i.e. using tableless plugin).

Error when going to view at "http://localhost:3000/graph2/edit" is
   undefined method `calc_type' for Line(Table doesn't exist):Class

Thanks in advance - details below:

-----controller------
class Graph2Controller < ApplicationController

  def edit
    # Default parameters for form
    @graph_options = GraphOptions.new
    @graph_options.start_date = Time.now.to_date - 3.months
    @graph_options.end_date = Time.now.to_date + 3.months
    @graph_options.granularity = 1
    @graph_options.lines.build
    @graph_options.lines[0].calc_type = "manual calc"

  end

  def save
    @graph_options = GraphOptions.new(params[:graph_options])
    render :action => "edit" if !@graph_options.valid?
  end

end

-------- model ------
class GraphOptions < ActiveRecord::BaseWithoutTable
  column :label_title, :string
  column :start_date, :date
  column :end_date, :date
  column :granularity, :integer

  has_many :lines

  validates_presence_of :label_title
  validates_numericality_of :granularity
  validates_associated :lines

  def validate
    errors.add('start_date', 'is not in Date format') if
!start_date.kind_of?(Date)
    errors.add('end_date', 'is not in Date format') if !end_date.kind_of?(Date)
  end

end

class Line < ActiveRecord::BaseWithoutTable
  column :calc_type, :string
  validates_presence_of :calc_type
end

----- view -------
<h1>Graph Options Selection</h1>

<% form_for :graph_options, :url => {:action => 'save'} do |f| %>
    <%= f.error_messages %>
  <table>
    <tr><td>Graph Title: </td><td><%= f.text_field :label_title %></td></tr>
    <tr><td>Start Date: </td><td><%= f.calendar_date_select
:start_date %></td></tr>
    <tr><td>End Date: </td><td><%= f.calendar_date_select :end_date %></td></tr>
    <tr><td>Granularity (days): </td><td><%= f.text_field :granularity
%></td></tr>
  </table>

  <% fields_for "graph_options[lines][]", @graph_options.lines do |fields| %>
    Calculation Type: <%= fields.text_field 'calc_type' %>
# <=== ERROR IS HERE
  <% end %>

  <%= submit_tag 'Create Graph' %>

<% end %>

-------Error----------
NoMethodError in Graph2#edit

Showing graph2/edit.html.erb where line #13 raised:

undefined method `calc_type' for Line(Table doesn't exist):Class

Extracted source (around line #13):

10: </table>
11:
12: <% fields_for "graph_options[lines][]", @graph_options.lines do

fields> %>

13: Calculation Type: <%= fields.text_field 'calc_type' %>
14: <% end %>
15:
16:

RAILS_ROOT: /Users/greg/source/myequity
Application Trace | Framework Trace | Full Trace

/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/base.rb:1672:in
`method_missing'
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/associations/association_collection.rb:288:in
`send'
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/associations/association_collection.rb:288:in
`method_missing'
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/base.rb:1857:in
`with_scope'
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/associations/association_proxy.rb:164:in
`send'
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/associations/association_proxy.rb:164:in
`with_scope'
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/associations/association_collection.rb:284:in
`method_missing'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/helpers/form_helper.rb:628:in
`send'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/helpers/form_helper.rb:628:in
`value_before_type_cast'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/helpers/form_helper.rb:616:in
`value_before_type_cast'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/helpers/form_helper.rb:535:in
`to_input_field_tag'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/helpers/form_helper.rb:358:in
`text_field'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/helpers/form_helper.rb:713:in
`send'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/helpers/form_helper.rb:713:in
`text_field'
app/views/graph2/edit.html.erb:13:in
`_run_erb_47app47views47graph247edit46html46erb'
app/views/graph2/edit.html.erb:12:in
`_run_erb_47app47views47graph247edit46html46erb'
app/views/graph2/edit.html.erb:3:in
`_run_erb_47app47views47graph247edit46html46erb'
/opt/local/bin/rdebug-ide:19:in `load'
/opt/local/bin/rdebug-ide:19

/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/base.rb:1672:in
`method_missing'
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/associations/association_collection.rb:288:in
`send'
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/associations/association_collection.rb:288:in
`method_missing'
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/base.rb:1857:in
`with_scope'
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/associations/association_proxy.rb:164:in
`send'
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/associations/association_proxy.rb:164:in
`with_scope'
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/associations/association_collection.rb:284:in
`method_missing'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/helpers/form_helper.rb:628:in
`send'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/helpers/form_helper.rb:628:in
`value_before_type_cast'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/helpers/form_helper.rb:616:in
`value_before_type_cast'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/helpers/form_helper.rb:535:in
`to_input_field_tag'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/helpers/form_helper.rb:358:in
`text_field'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/helpers/form_helper.rb:713:in
`send'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/helpers/form_helper.rb:713:in
`text_field'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/helpers/form_helper.rb:317:in
`fields_for'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/helpers/form_helper.rb:317:in
`fields_for'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/helpers/form_helper.rb:253:in
`form_for'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/base.rb:342:in
`send'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/base.rb:342:in
`execute'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/template_handlers/compilable.rb:29:in
`send'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/template_handlers/compilable.rb:29:in
`render'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/template.rb:35:in
`render'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/template.rb:22:in
`render_template'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/base.rb:248:in
`render_file'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/base.rb:1112:in
`render_for_file'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/base.rb:845:in
`render_with_no_layout'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/layout.rb:251:in
`render_without_benchmark'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/benchmarking.rb:51:in
`render_without_active_scaffold'
/opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_support/core_ext/benchmark.rb:8:in
`realtime'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/benchmarking.rb:51:in
`render_without_active_scaffold'
vendor/plugins/active_scaffold/lib/extensions/action_controller_rendering.rb:13:in
`render'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/base.rb:1161:in
`default_render'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/base.rb:1167:in
`perform_action_without_filters'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/filters.rb:579:in
`call_filters'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/filters.rb:572:in
`perform_action_without_benchmark'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/benchmarking.rb:68:in
`perform_action_without_rescue'
/opt/local/lib/ruby/1.8/benchmark.rb:293:in `measure'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/benchmarking.rb:68:in
`perform_action_without_rescue'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/rescue.rb:201:in
`perform_action_without_caching'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/caching/sql_cache.rb:13:in
`perform_action'
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/connection_adapters/abstract/query_cache.rb:33:in
`cache'
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/query_cache.rb:8:in
`cache'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/caching/sql_cache.rb:12:in
`perform_action'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/base.rb:529:in
`send'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/base.rb:529:in
`process_without_filters'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/filters.rb:568:in
`process_without_session_management_support'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/session_management.rb:130:in
`process'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/base.rb:389:in
`process'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/dispatcher.rb:149:in
`handle_request'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/dispatcher.rb:107:in
`dispatch'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/dispatcher.rb:104:in
`synchronize'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/dispatcher.rb:104:in
`dispatch'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/dispatcher.rb:120:in
`dispatch_cgi'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/dispatcher.rb:35:in
`dispatch'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel/rails.rb:76:in
`process'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel/rails.rb:74:in
`synchronize'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel/rails.rb:74:in
`process'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:159:in
`process_client'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:158:in `each'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:158:in
`process_client'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:285:in `run'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:285:in
`initialize'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:285:in `new'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:285:in `run'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:268:in
`initialize'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:268:in `new'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:268:in `run'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel/configurator.rb:282:in
`run'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel/configurator.rb:281:in
`each'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel/configurator.rb:281:in
`run'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/bin/mongrel_rails:128:in `run'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel/command.rb:212:in
`run'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/bin/mongrel_rails:281
/opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_support/dependencies.rb:503:in
`load'
/opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_support/dependencies.rb:503:in
`load'
/opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_support/dependencies.rb:355:in
`new_constants_in'
/opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_support/dependencies.rb:503:in
`load'
/opt/local/lib/ruby/gems/1.8/gems/rails-2.1.1/lib/commands/servers/mongrel.rb:64
/opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
`gem_original_require'
/opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
/opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_support/dependencies.rb:510:in
`require'
/opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_support/dependencies.rb:355:in
`new_constants_in'
/opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_support/dependencies.rb:510:in
`require'
/opt/local/lib/ruby/gems/1.8/gems/rails-2.1.1/lib/commands/server.rb:39
/opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
`gem_original_require'
/opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
script/server:3
/opt/local/lib/ruby/gems/1.8/gems/ruby-debug-ide-0.3.1/lib/ruby-debug.rb:96:in
`debug_load'
/opt/local/lib/ruby/gems/1.8/gems/ruby-debug-ide-0.3.1/lib/ruby-debug.rb:96:in
`main'
/opt/local/lib/ruby/gems/1.8/gems/ruby-debug-ide-0.3.1/bin/rdebug-ide:76

/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/base.rb:1672:in
`method_missing'
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/associations/association_collection.rb:288:in
`send'
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/associations/association_collection.rb:288:in
`method_missing'
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/base.rb:1857:in
`with_scope'
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/associations/association_proxy.rb:164:in
`send'
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/associations/association_proxy.rb:164:in
`with_scope'
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/associations/association_collection.rb:284:in
`method_missing'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/helpers/form_helper.rb:628:in
`send'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/helpers/form_helper.rb:628:in
`value_before_type_cast'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/helpers/form_helper.rb:616:in
`value_before_type_cast'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/helpers/form_helper.rb:535:in
`to_input_field_tag'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/helpers/form_helper.rb:358:in
`text_field'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/helpers/form_helper.rb:713:in
`send'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/helpers/form_helper.rb:713:in
`text_field'
app/views/graph2/edit.html.erb:13:in
`_run_erb_47app47views47graph247edit46html46erb'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/helpers/form_helper.rb:317:in
`fields_for'
app/views/graph2/edit.html.erb:12:in
`_run_erb_47app47views47graph247edit46html46erb'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/helpers/form_helper.rb:317:in
`fields_for'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/helpers/form_helper.rb:253:in
`form_for'
app/views/graph2/edit.html.erb:3:in
`_run_erb_47app47views47graph247edit46html46erb'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/base.rb:342:in
`send'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/base.rb:342:in
`execute'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/template_handlers/compilable.rb:29:in
`send'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/template_handlers/compilable.rb:29:in
`render'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/template.rb:35:in
`render'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/template.rb:22:in
`render_template'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/base.rb:248:in
`render_file'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/base.rb:1112:in
`render_for_file'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/base.rb:845:in
`render_with_no_layout'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/layout.rb:251:in
`render_without_benchmark'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/benchmarking.rb:51:in
`render_without_active_scaffold'
/opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_support/core_ext/benchmark.rb:8:in
`realtime'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/benchmarking.rb:51:in
`render_without_active_scaffold'
vendor/plugins/active_scaffold/lib/extensions/action_controller_rendering.rb:13:in
`render'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/base.rb:1161:in
`default_render'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/base.rb:1167:in
`perform_action_without_filters'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/filters.rb:579:in
`call_filters'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/filters.rb:572:in
`perform_action_without_benchmark'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/benchmarking.rb:68:in
`perform_action_without_rescue'
/opt/local/lib/ruby/1.8/benchmark.rb:293:in `measure'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/benchmarking.rb:68:in
`perform_action_without_rescue'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/rescue.rb:201:in
`perform_action_without_caching'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/caching/sql_cache.rb:13:in
`perform_action'
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/connection_adapters/abstract/query_cache.rb:33:in
`cache'
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/query_cache.rb:8:in
`cache'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/caching/sql_cache.rb:12:in
`perform_action'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/base.rb:529:in
`send'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/base.rb:529:in
`process_without_filters'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/filters.rb:568:in
`process_without_session_management_support'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/session_management.rb:130:in
`process'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/base.rb:389:in
`process'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/dispatcher.rb:149:in
`handle_request'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/dispatcher.rb:107:in
`dispatch'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/dispatcher.rb:104:in
`synchronize'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/dispatcher.rb:104:in
`dispatch'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/dispatcher.rb:120:in
`dispatch_cgi'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/dispatcher.rb:35:in
`dispatch'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel/rails.rb:76:in
`process'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel/rails.rb:74:in
`synchronize'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel/rails.rb:74:in
`process'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:159:in
`process_client'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:158:in `each'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:158:in
`process_client'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:285:in `run'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:285:in
`initialize'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:285:in `new'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:285:in `run'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:268:in
`initialize'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:268:in `new'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:268:in `run'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel/configurator.rb:282:in
`run'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel/configurator.rb:281:in
`each'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel/configurator.rb:281:in
`run'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/bin/mongrel_rails:128:in `run'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel/command.rb:212:in
`run'
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1.4/bin/mongrel_rails:281
/opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_support/dependencies.rb:503:in
`load'
/opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_support/dependencies.rb:503:in
`load'
/opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_support/dependencies.rb:355:in
`new_constants_in'
/opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_support/dependencies.rb:503:in
`load'
/opt/local/lib/ruby/gems/1.8/gems/rails-2.1.1/lib/commands/servers/mongrel.rb:64
/opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
`gem_original_require'
/opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
/opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_support/dependencies.rb:510:in
`require'
/opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_support/dependencies.rb:355:in
`new_constants_in'
/opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_support/dependencies.rb:510:in
`require'
/opt/local/lib/ruby/gems/1.8/gems/rails-2.1.1/lib/commands/server.rb:39
/opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
`gem_original_require'
/opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
script/server:3
/opt/local/lib/ruby/gems/1.8/gems/ruby-debug-ide-0.3.1/lib/ruby-debug.rb:96:in
`debug_load'
/opt/local/lib/ruby/gems/1.8/gems/ruby-debug-ide-0.3.1/lib/ruby-debug.rb:96:in
`main'
/opt/local/lib/ruby/gems/1.8/gems/ruby-debug-ide-0.3.1/bin/rdebug-ide:76
/opt/local/bin/rdebug-ide:19:in `load'
/opt/local/bin/rdebug-ide:19

Request

Parameters:

None

Show session dump

ok, re "I'm just trying to load a set of options which doesn't require
tables (i.e. using tableless plugin)" I've got the View working now,
however when I submit back I have an error as Rails tries to populate
the association models. Any ideas - it's like the parameter
array/hash structure coming into Rails is fine, however when it tries
to load the association data into the model for the associations it
has a problem.

Is my model (graph_options.rb) correct? Do I need to specify a
specific "attr_accessible :lines" here? Or should the "has_many
:lines" be enough?

------------- ERROR -----------
ActiveRecord::AssociationTypeMismatch in Graph2Controller#save

Line(#19260340) expected, got HashWithIndifferentAccess(#9296710)

RAILS_ROOT: /Users/greg/source/myequity
Application Trace | Framework Trace | Full Trace

/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/associations/association_proxy.rb:210:in
`raise_on_type_mismatch'
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/associations/association_collection.rb:232:in
`replace'
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/associations/association_collection.rb:232:in
`each'
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/associations/association_collection.rb:232:in
`replace'
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/associations.rb:1156:in
`lines='
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/base.rb:2372:in
`send'
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/base.rb:2372:in
`attributes='
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/base.rb:2371:in
`each'
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/base.rb:2371:in
`attributes='
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/base.rb:2141:in
`initialize'
app/controllers/graph2_controller.rb:22:in `new'
app/controllers/graph2_controller.rb:22:in `save'
/opt/local/bin/rdebug-ide:19:in `load'
/opt/local/bin/rdebug-ide:19

Request
Parameters:

{"commit"=>"Create Graph",
"authenticity_token"=>"78f0a9ff834dbf09d2ea788e5174649cbc933bf9",
"graph_options"=>{"start_date"=>"August 22,
2008",
"end_date"=>"Februar y 22,
2009",
"label_title"=>"asdf",
"lines"=>[{"foo"=>"November 22,
2008",
"calc_type"=>"manual calc"},
{"foo"=>"November 22,
2008",
"calc_type"=>"manual calc"}],
"granularity"=>"1",
"chart_type"=>"1"}}

----- VIEW ----------
<h1>Graph Options Selection</h1>

<% form_for :graph_options, :url => {:action => 'save'} do |f| %>
  <%= f.error_messages %>
  <table>
    <tr><td>Graph Title: </td><td><%= f.text_field :label_title %></td></tr>
    <tr><td>Start Date: </td><td><%= f.calendar_date_select
:start_date %></td></tr>
    <tr><td>End Date: </td><td><%= f.calendar_date_select :end_date %></td></tr>
    <tr><td>Granularity (days): </td><td><%= f.text_field :granularity
%></td></tr>
    <tr><td>Chart Type: </td><td><%= f.text_field :chart_type %></td></tr>

    <% @graph_options.lines.each do |line| %>
      <tr>
        <% fields_for "graph_options[lines][]",
@graph_options.lines[0] do |fields| %>
          <td> Calculation Type: <%= fields.text_field 'calc_type' %> </td>
          <td> Calculation Type: <%= fields.calendar_date_select 'foo' %> </td>
        <% end %>
      </tr>
    <% end %>

  </table>

  <%= submit_tag 'Create Graph' %>

<% end %>

------ CONTROLLER -------
class Graph2Controller < ApplicationController

  def edit
    # Default parameters for form
    @graph_options = GraphOptions.new
    @graph_options.start_date = Time.now.to_date - 3.months
    @graph_options.end_date = Time.now.to_date + 3.months
    @graph_options.granularity = 1
    @graph_options.lines.build
    @graph_options.lines.build

    # Testing ONly
    @graph_options.chart_type = 1
    @graph_options.lines[0].calc_type = "manual calc"
    @graph_options.lines[1].calc_type = "auto calc"
    @graph_options.lines[0].foo = Time.now.to_date
    @graph_options.lines[1].foo = Time.now.to_date

  end

  def save
    @graph_options = GraphOptions.new(params[:graph_options])
    render :action => "edit" if !@graph_options.valid?
  end

end

----------MODEL----------

class GraphOptions < ActiveRecord::BaseWithoutTable
  column :label_title, :string
  column :start_date, :date
  column :end_date, :date
  column :granularity, :integer
  column :chart_type, :integer

  #attr_accessible :lines

  has_many :lines

  validates_presence_of :label_title
  validates_numericality_of :granularity, :chart_type
  validates_associated :lines

  def validate
    errors.add('start_date', 'is not in Date format') if
!start_date.kind_of?(Date)
    errors.add('end_date', 'is not in Date format') if !end_date.kind_of?(Date)
  end

end

class Line < ActiveRecord::BaseWithoutTable
# attr_accessible :calc_type
  column :calc_type, :string
  column :foo, :date
  validates_presence_of :calc_type
end

attr_accessible is something completely different. The issue here is
that all update_attributes does is for each key value pair it calls
your_model.send("#{key}=", value). That's fine for attributes, but
that means that what it's passing to lines= is not an array of Line
items, but an array of hashes.
In rails 2.1 you just have to extract that array of hashes, turn it
into objects of the right type and then assign it to
your_object.lines. There was talk of changing this in rails 2.2 but I
can't remember what was done about it in the end.

Fred

thanks for responding Frederick: So just to clarify you mean:

(a) I would have to do this in my controller in the "save" method right?
(b) so anyone that anyone using Rails that has nested models in their
views do have to do this too then? i.e. extract work in the
controller? i.e. there's no ability in Rails 2.1 with nested models
to have the params perfectly auto-populated the models (i.e. parent
model and it's association models) out-of-the-box?

thanks again

PS. Actually I've just seen in this RailsCasts episode that Ryan
seems to have a nested model controller that does translate the parent
& child model data from the form to parent model and its association
(child model). Am I missing something Frederick re whether you may
have been wrong here?

   Link = http://railscasts.com/episodes/73-complex-forms-part-1

PS. Actually I've just seen in this RailsCasts episode that Ryan
seems to have a nested model controller that does translate the parent
& child model data from the form to parent model and its association
(child model). Am I missing something Frederick re whether you may
have been wrong here?

Link =http://railscasts.com/episodes/73-complex-forms-part-1

That's one way of doing it, another is doing it in the controller (in
your update & create methods as you suggested). But there isn't
anything built in, if you look at Ryan's code he's added a magic
accessor to his project model that massages an array of hashes into an
array of task objects. You do need to write that code and it has to
go somewhere.

Fred

oh, got it Frederick,

To be more self sufficient, how would I be able to confirm for myself
exactly what the Rails controller framework is looking for when it's
trying to create models out of the param's it gets (i.e. behind the
scenes before it gets to your code)?

If I had a way of confirming this then I could cement my understanding
of why Ryan's extra method made the difference (as an example).

Do you have to pretty much look at Rails code to have derived this
understanding? Like it's not even clear to me which rails tool is
being used to recursively build the models out of the params, as it
must get called in the rails code. Hope this makes sense.

Thanks again

oh, got it Frederick,

To be more self sufficient, how would I be able to confirm for myself
exactly what the Rails controller framework is looking for when it's
trying to create models out of the param's it gets (i.e. behind the
scenes before it gets to your code)?

Look at the code for update_attributes in activerecord

Fred

thanks - got the auto-creation of nested models working!

Now I seem to be on the next challenge of getting decent validation
error messages show on the view with the nested models :slight_smile: Seems to
be somewhat discussed at
http://railscasts.com/episodes/75-complex-forms-part-3 but doesn't
seem to have a perfect solution. Will keep digging. If someone knows
of the latest/nicest way to nicely get detailed validation messages
appearing where it makes sense for a view with nested models I'd be
very interested :slight_smile:

thanks