thr3ads.net - Rails - Nil object in E1 capture the order [Jan 2007]

If this information is useful, please help other people find it:
Share via:

Bontina Chen

2007-Jan-12 02:19 UTC

Nil object in E1 capture the order

I''m following the depot application in the rails bible Agile Web
Development with Rails. In interation E1

NoMethodError in Admin#checkout

Showing app/views/admin/checkout.rhtml where line #12 raised:

You have a nil object when you didn''t expect it!
You might have expected an instance of Array.
The error occured while evaluating nil.include?

Extracted source (around line #12):

9:     <% form_for :list, :url => { :action => :save_list } do |form|
%>
10:       <p>
11:         <label for="list_name">List Name:</label>
12:   <!--      <%= form.text_field :name, :size => 40 %> -->
13:       </p>

I have a page with all the product listed. And I''m creating the list by
choosing from products on this page.
For database and model setting I have
product.rb
has many list_item

list.rb
has many list_item

list_item.rb

class ListItem

  #belongs_to :list
  #belongs_to :product
  include Reloadable
  attr_reader :product, :quantity

The lines I commented out will generate errors as follows

 NoMethodError

undefined method `belongs_to'' for ListItem:Class

RAILS_ROOT: C:/INSTAN~1/rails_apps/test/config/..
Application Trace | Framework Trace | Full Trace

#{RAILS_ROOT}/app/models/list_item.rb:4
#{RAILS_ROOT}/app/controllers/application.rb:8



This error occured while loading the following files:
   application.rb
   => model list_item.rb
   list_item.rb

I think this is the root of the nil object problem in checkout.
Since line_item is not correctly related to list and product.
So the list is a nil object.

Anyone knows why "belongs to " is not recognized?

Thanks in advance

-- 
Posted via http://www.ruby-forum.com/.

--~--~---------~--~----~------------~-------~--~----~
 You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

Snowman

2007-Jan-12 03:05 UTC

head link

Re: Nil object in E1 capture the order

> class ListItem
> 
>   #belongs_to :list
>   #belongs_to :product
>   include Reloadable
>   attr_reader :product, :quantity
ListItem needs to extend ActiveRecord::Base

class ListItem < ActiveRecord::Base
    belongs_to :list
    belongs_to :product

    ...

end

-- 
Posted via http://www.ruby-forum.com/.

--~--~---------~--~----~------------~-------~--~----~
 You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

Abon

2007-Jan-12 05:20 UTC

head link

Re: Nil object in E1 capture the order

Snowman wrote:>> class ListItem
>> 
>>   #belongs_to :list
>>   #belongs_to :product
>>   include Reloadable
>>   attr_reader :product, :quantity
> 
> ListItem needs to extend ActiveRecord::Base
> 
> class ListItem < ActiveRecord::Base
>     belongs_to :list
>     belongs_to :product
> 
>     ...
> 
> end
Thanks! belongs_to is recognized.
But the nil object problem still remains.
My reasoning about the "belongs_to unrecognition" to "nil
object" seems
to be wrong.

Followings are my the action capture the list item.

def add_to_list

    begin
   @product = Product.find(params[:id])
    rescue
     logger.error("Attempt to access invalid product #{params[:id]}")
     flash[:notice] = "There is no such product"
   redirect_to :action => :index
    else
     @list = find_list
   @current_item= @list.add_product(@product)
   redirect_to_index unless request.xhr?
    end
  end

  def checkout
    @list = find_list
      if @list.items.empty?
      redirect_to_index("Your list is empty")
      else
      @list = List.new
      end
  end
  def empty_list

  session[:list] =nil
    redirect_to_index
  end

-- 
Posted via http://www.ruby-forum.com/.

--~--~---------~--~----~------------~-------~--~----~
 You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

Snowman

2007-Jan-12 10:34 UTC

head link

Re: Nil object in E1 capture the order

>   def checkout
>     @list = find_list
>       if @list.items.empty?
>       redirect_to_index("Your list is empty")
>       else
>       @list = List.new
>       end
>   end
My guess is that find_list is returning nil and you''re getting an error
when you call @list.items. If this is not it then I''ll need more 
information - do you have a stack trace?

-- 
Posted via http://www.ruby-forum.com/.

--~--~---------~--~----~------------~-------~--~----~
 You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

Abon

2007-Jan-13 06:03 UTC

head link

Re: Nil object in E1 capture the order

Snowman wrote:>>   def checkout
>>     @list = find_list
>>       if @list.items.empty?
>>       redirect_to_index("Your list is empty")
>>       else
>>       @list = List.new
>>       end
>>   end
> 
> My guess is that find_list is returning nil and you''re getting an
error
> when you call @list.items. If this is not it then I''ll need more 
> information - do you have a stack trace?Do you mean this?
You have a nil object when you didn''t expect it!
You might have expected an instance of Array.
The error occured while evaluating nil.include?
Extracted source (around line #12):
9:     <% form_for :list, :url => { :action => :save_list } do |form|
%>
10:       <p>
11:         <label for="list_name">皜?迂:</label>
12:   <!--      <%= form.text_field :name, :size => 40 %> -->
13:       </p>
14:
15:


RAILS_ROOT: C:/INSTAN~1/rails_apps/test/config/..
Application Trace | Framework Trace | Full Trace
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/base.rb:1772:in
`method_missing''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_view/helpers/form_helper.rb:341:in
`send''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_view/helpers/form_helper.rb:341:in
`value_before_type_cast''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_view/helpers/form_helper.rb:253:in
`to_input_field_tag''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_view/helpers/form_helper.rb:160:in
`text_field''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_view/helpers/form_helper.rb:395:in
`send''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_view/helpers/form_helper.rb:395:in
`text_field''
#{RAILS_ROOT}/app/views/admin/checkout.rhtml:12:in 
`_run_rhtml_admin_checkout''
#{RAILS_ROOT}/app/views/admin/checkout.rhtml:9:in 
`_run_rhtml_admin_checkout''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/base.rb:1772:in
`method_missing''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_view/helpers/form_helper.rb:341:in
`send''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_view/helpers/form_helper.rb:341:in
`value_before_type_cast''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_view/helpers/form_helper.rb:253:in
`to_input_field_tag''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_view/helpers/form_helper.rb:160:in
`text_field''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_view/helpers/form_helper.rb:395:in
`send''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_view/helpers/form_helper.rb:395:in
`text_field''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_view/helpers/form_helper.rb:149:in
`fields_for''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_view/helpers/form_helper.rb:127:in
`form_for''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_view/base.rb:316:in
`send''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_view/base.rb:316:in
`compile_and_render_template''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_view/base.rb:292:in
`render_template''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_view/base.rb:251:in
`render_file''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/base.rb:726:in
`render_file''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/base.rb:648:in
`render_with_no_layout''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/layout.rb:245:in
`render_without_benchmark''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/benchmarking.rb:53:in
`render''
C:/INSTAN~1/ruby/lib/ruby/1.8/benchmark.rb:293:in `measure''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/benchmarking.rb:53:in
`render''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/base.rb:942:in
`perform_action_without_filters''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/filters.rb:368:in
`perform_action_without_benchmark''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/benchmarking.rb:69:in
`perform_action_without_rescue''
C:/INSTAN~1/ruby/lib/ruby/1.8/benchmark.rb:293:in `measure''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/benchmarking.rb:69:in
`perform_action_without_rescue''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/rescue.rb:82:in
`perform_action''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/base.rb:408:in
`send''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/base.rb:408:in
`process_without_filters''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/filters.rb:377:in
`process_without_session_management_support''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/session_management.rb:117:in
`process''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/dispatcher.rb:38:in 
`dispatch''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/lib/mongrel/rails.rb:73:in
`process''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/lib/mongrel.rb:551:in
`process_client''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/lib/mongrel.rb:550:in
`each''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/lib/mongrel.rb:550:in
`process_client''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/lib/mongrel.rb:636:in
`run''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/lib/mongrel.rb:636:in
`initialize''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/lib/mongrel.rb:636:in
`new''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/lib/mongrel.rb:636:in
`run''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/lib/mongrel.rb:625:in
`initialize''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/lib/mongrel.rb:625:in
`new''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/lib/mongrel.rb:625:in
`run''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/lib/mongrel.rb:956:in
`run''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/lib/mongrel.rb:955:in
`each''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/lib/mongrel.rb:955:in
`run''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/bin/mongrel_rails:127:in
`run''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/lib/mongrel/command.rb:199:in
`run''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/bin/mongrel_rails:235
C:/INSTAN~1/ruby/bin/mongrel_rails:18:in `load''
C:/INSTAN~1/ruby/bin/mongrel_rails:18
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/base.rb:1772:in
`method_missing''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_view/helpers/form_helper.rb:341:in
`send''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_view/helpers/form_helper.rb:341:in
`value_before_type_cast''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_view/helpers/form_helper.rb:253:in
`to_input_field_tag''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_view/helpers/form_helper.rb:160:in
`text_field''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_view/helpers/form_helper.rb:395:in
`send''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_view/helpers/form_helper.rb:395:in
`text_field''
#{RAILS_ROOT}/app/views/admin/checkout.rhtml:12:in 
`_run_rhtml_admin_checkout''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_view/helpers/form_helper.rb:149:in
`fields_for''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_view/helpers/form_helper.rb:127:in
`form_for''
#{RAILS_ROOT}/app/views/admin/checkout.rhtml:9:in 
`_run_rhtml_admin_checkout''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_view/base.rb:316:in
`send''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_view/base.rb:316:in
`compile_and_render_template''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_view/base.rb:292:in
`render_template''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_view/base.rb:251:in
`render_file''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/base.rb:726:in
`render_file''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/base.rb:648:in
`render_with_no_layout''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/layout.rb:245:in
`render_without_benchmark''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/benchmarking.rb:53:in
`render''
C:/INSTAN~1/ruby/lib/ruby/1.8/benchmark.rb:293:in `measure''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/benchmarking.rb:53:in
`render''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/base.rb:942:in
`perform_action_without_filters''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/filters.rb:368:in
`perform_action_without_benchmark''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/benchmarking.rb:69:in
`perform_action_without_rescue''
C:/INSTAN~1/ruby/lib/ruby/1.8/benchmark.rb:293:in `measure''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/benchmarking.rb:69:in
`perform_action_without_rescue''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/rescue.rb:82:in
`perform_action''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/base.rb:408:in
`send''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/base.rb:408:in
`process_without_filters''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/filters.rb:377:in
`process_without_session_management_support''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/session_management.rb:117:in
`process''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/dispatcher.rb:38:in 
`dispatch''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/lib/mongrel/rails.rb:73:in
`process''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/lib/mongrel.rb:551:in
`process_client''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/lib/mongrel.rb:550:in
`each''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/lib/mongrel.rb:550:in
`process_client''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/lib/mongrel.rb:636:in
`run''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/lib/mongrel.rb:636:in
`initialize''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/lib/mongrel.rb:636:in
`new''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/lib/mongrel.rb:636:in
`run''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/lib/mongrel.rb:625:in
`initialize''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/lib/mongrel.rb:625:in
`new''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/lib/mongrel.rb:625:in
`run''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/lib/mongrel.rb:956:in
`run''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/lib/mongrel.rb:955:in
`each''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/lib/mongrel.rb:955:in
`run''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/bin/mongrel_rails:127:in
`run''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/lib/mongrel/command.rb:199:in
`run''
C:/INSTAN~1/ruby/lib/ruby/gems/1.8/gems/mongrel-0.3.13.3-mswin32/bin/mongrel_rails:235
C:/INSTAN~1/ruby/bin/mongrel_rails:18:in `load''
C:/INSTAN~1/ruby/bin/mongrel_rails:18
Request
Parameters: None
Show session dump
---
:user_id: 1
:list: !ruby/object:List
  items:
  - !ruby/object:ListItem
    product: !ruby/object:Product
      attributes:
        popular_score:
        title: !binary |
          5LiJ6YOO6aSQ5YyF
        nickname:
        primary_price: "30"
        primary_link: http://tw.yahoo.com
        id: "1"
        image_url1: http://pandora.com/images/logo_pandora.gif
        description: !binary |
          6auY6ZuE5ZCN55Si
        user_id: "4"
        created_at: 0000-00-00 00:00:00
        browse_times:
    quantity: 1
  - !ruby/object:ListItem
    product: !ruby/object:Product
      attributes:
        popular_score:
        title: Chanel patent- leather high- heels
        nickname:
        primary_price: "500"
        primary_link: http://www.highheelshoemuseum.com/
        id: "3"
        image_url1: 
http://ec3.images-amazon.com/images/P/B000H6QZLA.01-A242Z34VYGHM9W._AA280_SCLZZZZZZZ_V62233886_.jpg
        description: bold red and patent red are this season''s must-buy
        user_id: "4"
        created_at: 0000-00-00 00:00:00
        browse_times:
    quantity: 1
  - !ruby/object:ListItem
    product: !ruby/object:Product
      attributes:
        popular_score:
        title: "\xE5\xB9\xB3\xE5\xBA\x95\xE5\x9C\x93\xE9 
\xAD\xE8\x8A\xAD\xE8\x95\xBE\xE9\x9E\x8B"
        nickname:
        primary_price: "690"
        primary_link: http://tw.page.bid.yahoo.com/tw/auction/1148041732
        id: "4"
        image_url1: 
http://tw.image.bid.yahoo.com/users/4/8/1/3/titi811019-img600x300-1162618416nn21-4.jpg
        description: 
"\xE4\xB8\x80\xE7\x9B\xB4\xE5\xBE\x88\xE6\x83\xB3\xE5?\x9A\xE5\x83?French 
Sole. London 
Sole\xE9\x82\xA3\xE6\xA8\xA3\xE7\x9A\x84\xE8\x8A\xAD\xE8\x95\xBE\xE9\x9E\x8B\xE6\xAC\xBE!\r\n\
         
\xE7\xB1\x8C\xE5\x82\x99\xE5\xBE\x88\xE4\xB9\x85\xE7\xB5\x82\xE6\x96\xBC\xE4\xB8\x8A\xE6\x9E\xB6\xE5\x9B\x89^^\r\n\
         
\xE9\x9E\x8B\xE5\xBA\x95\xE7\x89\xB9\xE5\x88\xA5\xE4\xBD\xBF\xE7\x94\xA8\xE9\x98\xB2\xE6\xBB\x91\xE7\x9A\x84\xE6\xA9\xA1\xE8\x86
\xE5\xBA\x95~\r\n\
          \xE5\x8A 
\xE4\xB8\x8A\xE5\x8E\x9A\xE5\x8E\x9A\xE7\x9A\x84\xE6\xB0\xA3\xE5\xA2\x8A\xE9\x9E\x8B\xE5\xBA\x95~\r\n\
         
\xE7\xA9\xBF\xE8\xB5\xB7\xE4\xBE\x86\xE5\x83?\xE9?\x8B\xE5\x8B\x95\xE9\x9E\x8B\xE4\xB8\x80\xE6\xA8\xA3\xE8\x88\x92\xE6\x9C?\xE5\x96\x94!\r\n\
          \r\n\
         
\xE6\xAF?\xE9\x9B\x99\xE9\x83\xBD\xE6?\xAD\xE9\x85?\xE4\xB8?\xE5?\x8C\xE7\x9A\x84\xE8?\xB4\xE8?\xB6\xE7\xB5?\xE5\x92\x8C\xE8\xBB\x8A\xE9\x82\x8A.\xE8\xB6\x85\xE7\xB4\x9A\xE5?\xAF\xE6\x84\x9B\xE5\x96\x94!\r\n\
         
\xE6\x8E\xA8\xE5\x87\xBA\xE7\xA7\x8B\xE5\x86\xAC\xE6\x96\xB0\xE8\x89\xB2!\xE6\xBC\x86\xE7\x9A\xAE\xE6\xAC\xBE!\xE8\xB1?\xE5\xAF\x8C\xE7\x9A\x84\xE7\xB3\x96\xE6\x9E\x9C\xE8\x89\xB2\xE5\xBD\xA9!\xE7\x9C\x8B\xE4\xBA\x86\xE5\xB0\xB1\xE8\xB6\x85\xE7\xB4\x9A\xE5\x96\x9C\xE6\xAD\xA1^^\r\n\
         
\xE6\x96\xB0\xE5\xA2\x9E\xE5\xA4\xA7\xE5\xB0\xBA\xE7\xA2\xBC43~45!\xE6\x95\xB8\xE9\x87?\xE4\xB8?\xE5\xA4\x9A\xE5\x96\x9C\xE6\xAD\xA1\xE8\xA6?\xE6\x8A\x8A\xE6?\xA1\xE5\x96\x94^^
"
        user_id: "4"
        created_at: 0000-00-00 00:00:00
        browse_times:
    quantity: 1
  - !ruby/object:ListItem
    product: !ruby/object:Product
      attributes:
        popular_score:
        title: "ZARA 
\xE7\xB7\x9E\xE5\xB8\xB6\xE5\x84\xAA\xE9\x9B\x85\xE6\xAC\xBE\xE5\x9C\x93\xE9\xA0\xAD\xE5\xB9\xB3\xE5\xBA\x95\xE9\x9E\x8B"
        nickname:
        primary_price: "3450"
        primary_link: http://tw.page.bid.yahoo.com/tw/auction/1148216341
        id: "5"
        image_url1: 
http://tw.image.bid.yahoo.com/users/0/3/2/9/princesskkk313-img480x360-11663084155-10.jpg
        description: "ZARA 
\xE8\xA5\xBF\xE7\x8F\xAD\xE7\x89\x99\xE6\x9C\x8D\xE9\xA3\xBE\r\n\
          \r\n\
         
\xE9\xA6\x99\xE5\xA5\x88\xE5\x85\x92\xE6\x9C\x89\xE4\xB8\x80\xE6\xAC\xBE\xE8\xB6\x85\xE5\x83\x8F\xE9\x80\x99\xE5\x80\x8B\xE7\x9A\x84\r\n\
          \r\n\
         
\xE5\xBE\x88\xE5\x84\xAA\xE9\x9B\x85\xE7\x9A\x84\xE4\xB8\x80\xE6\xAC\xBE\xE7\xA9\xBF\xE8\xB5\xB7\xE4\xBE\x86\xE5\xBE\x88\xE6\x9C\x89\xE6\xB0\xA3\xE8\xB3\xAA\xE6\xAD\x90
^O^\r\n\
          \r\n\
         
\xE6\x90\xAD\xE9\x85\x8D\xE6\x88\x91\xE9\x85\x8D\xE6\x88\x91\xE8\xB3\xA3\xE5\xA0\xB4\xE7\x9A\x84\xE9\xA6\x99\xE5\xA5\x88\xE5\x85\x92\xE5\x8C\x85\xE8\xB6\x85\xE5\xA5\xBD\xE7\x9C\x8B\xE7\x9A\x84\xEF\xBC\x81\xEF\xBC\x81
\r\n\
          \r\n\
         
\xE5\x89\x9B\xE4\xB8\x8A\xE5\xB8\x82\xE5\xB0\xB1\xE8\xA2\xAB\xE6\x90\xB6\xE8\xB3\xBC\xE4\xB8\x80\xE7\xA9\xBA\xE4\xBA\x86!\r\n\
          \r\n\
         
\xE4\xB8\x8D\xE7\xA2\xBA\xE5\xAE\x9A\xE9\x82\x84\xE6\x9C\x89\xE6\xB2\x92\xE6\x9C\x89\xE8\xB2\xA8\xE5\xA6\x82\xE6\x9E\x9C\xE8\xA6\x81\xE7\x9A\x84\xE8\xA9\xB1\xE5\x85\x88\xE8\xB7\x9F\xE5\x87\xB1\xE8\xA5\xBF\xE8\xAA\xAA\xE6\x88\x91\xE6\x89\xBE\xE5\x88\xB0\xE5\x9C\xA8\xE4\xB8\x8B\xE6\xA8\x99\xE6\xAD\x90!
\r\n\
          \r\n \r\n\
          \r\n\
         
\xE7\x9B\xAE\xE5\x89\x8D\xE6\x9C\x89\xE8\xB3\xBC\xE8\xB2\xB7\xE8\xB5\xB7\xE4\xBE\x86\xE7\x9A\x84\xE6\x9C\x89
36 \xE8\x99\x9F\xEF\xBC\x81\r\n\
          \r\n\
         
\xE8\xB3\xA3\xE5\xA0\xB4\xE9\x82\x84\xE6\x9C\x89\xE7\xB1\xB3\xE8\x89\xB2\xE7\x9A\x84\xE4\xB9\x9F\xE8\xB3\xA3\xE7\x9A\x84\xE8\xB6\x85\xE7\xB4\x9A\xE5\xA5\xBD\xE4\xBA\x86\xEF\xBC\x81\xEF\xBC\x81
"
        user_id: "1"
        created_at: 0000-00-00 00:00:00
        browse_times:
    quantity: 1
flash: !map:ActionController::Flash::FlashHash {}
Thanks


-- 
Posted via http://www.ruby-forum.com/.
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

Abon

2007-Jan-13 06:08 UTC

head link

Re: Nil object in E1 capture the order

And I also changed

def checkout
    @list = find_list
  puts @list.inspect
      if @list.items.empty?
      redirect_to_index("Your list is empty")
      else
      @list = List.new
      end
  end

in the server log

the @list contains list item which is definitely not empty.

It shows like this

#<List:0x46cee3c @items=[#<ListItem:0x46cedd8 @quantity=1, 
@product=#<Product:0x46ced60 @attributes={"popular_score"=>nil,
"t
in Alta velvet knee high boots - NET-A-PORTER.COM",
"nickname"=>nil,
"primary_price"=>"49343",
"primary_link"=>"http://www.ne
983", "id"=>"29", 
"image_url1"=>"http://www.net-a-porter.com/intl/images/product/15983/large/index.jpg",
"description"=>"Blac
with 110mm silver Swarovski rhinestone encrusted heel. Christian 
Louboutin boots have a pointed toe, a zip fastening on inner
sole.", "user_id"=>"1",
"created_at"=>"2007-01-12 17:50:51",
"browse_times"=>nil}>>, #<ListItem:0x46ce7d4 @quantity=1,
@produ
ttributes={"popular_score"=>nil,
"title"=>"Christian Louboutin -  Raffia
Slingback -  Neiman Marcus", "nickname"=>nil, "prima
ary_link"=>"http://www.neimanmarcus.com/store/catalog/prod.jhtml?itemId=prod35000031&parentId=cat5130731&masterId=cat000199&i
000141cat000149cat000199cat5130731", "id"=>"35", 
"image_url1"=>"http://www.neimanmarcus.com/products/mn/NMX0174_mn.jpg",
"des
Brown raffia.\r\n\342\200\242 Tonal leather piping.\r\n\342\200\242 Peep 
toe.\r\n\342\200\242 Elastic-back slingback.\r\n\342
\n\342\200\242 4 4/5\" heel.\r\n\342\200\242 Signature red 
sole.\r\n\342\200\242 Made in Italy. ",
"user_id"=>"1", "created_a
, "browse_times"=>nil}>>]>


-- 
Posted via http://www.ruby-forum.com/.

--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

Snow Man

2007-Jan-13 06:19 UTC

head link

Re: Nil object in E1 capture the order

> Do you mean this?
Yes, that''s exactly what I meant.

The line of code in rails that is causing the problem is this:

        if @attributes.include?(method_name) or

in ActiveRecord::Base

This indicates that some how the @attributes instance variable has been 
set to nil in one of your models. Are you directly using an instance 
variable with this name in one of your models?

-- 
Posted via http://www.ruby-forum.com/.

--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

Abon

2007-Jan-13 08:18 UTC

head link

Re: Nil object in E1 capture the order

Snow Man wrote:>> Do you mean this?
> 
> Yes, that''s exactly what I meant.
> 
> The line of code in rails that is causing the problem is this:
> 
>         if @attributes.include?(method_name) or
> 
> in ActiveRecord::Base
> 
> This indicates that some how the @attributes instance variable has been 
> set to nil in one of your models. Are you directly using an instance 
> variable with this name in one of your models?
I ended up finding out that I''m mistaking line_item.rb with 
cart_item.rb.
I followed the book again. But this time I got an application error 
which is almost clueless.T T

It''s really hard to figure out what''s going wrong.

-- 
Posted via http://www.ruby-forum.com/.

--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

Abon

2007-Jan-13 08:44 UTC

head link

Re: Nil object in E1 capture the order

Abon wrote:> Snow Man wrote:
>>> Do you mean this?
>> 
>> Yes, that''s exactly what I meant.
>> 
>> The line of code in rails that is causing the problem is this:
>> 
>>         if @attributes.include?(method_name) or
>> 
>> in ActiveRecord::Base
>> 
>> This indicates that some how the @attributes instance variable has been
>> set to nil in one of your models. Are you directly using an instance 
>> variable with this name in one of your models?
> 
> I ended up finding out that I''m mistaking line_item.rb with 
> cart_item.rb.
> I followed the book again. But this time I got an application error 
> which is almost clueless.T T
> 
> It''s really hard to figure out what''s going wrong.
There is what I digged out from my development.log

Session contains objects whose class definition isn''t available.
Remember to require the classes for all objects kept in the session.
(Original exception: uninitialized constant ListItem [NameError])



-- 
Posted via http://www.ruby-forum.com/.

--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

Abon

2007-Jan-13 08:57 UTC

head link

Re: Nil object in E1 capture the order

>> I ended up finding out that I''m mistaking line_item.rb with 
>> cart_item.rb.
>> I followed the book again. But this time I got an application error 
>> which is almost clueless.T T
>> 
>> It''s really hard to figure out what''s going wrong.
> 
> This is what I digged out from my development.log
> 
> Session contains objects whose class definition isn''t available.
> Remember to require the classes for all objects kept in the session.
> (Original exception: uninitialized constant ListItem [NameError])I''ve searched ListItem under the application directory.  Not found.
And I also cleared the sessions.
Still the same application error.
Where does Mongrel knows about ListItem?


-- 
Posted via http://www.ruby-forum.com/.

--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

Reasonably Related Threads

Search for more apparently analagous threads

Rails - Jan 2007 - Nil object in E1 capture the order

Nil object in E1 capture the order

Re: Nil object in E1 capture the order

Re: Nil object in E1 capture the order

Re: Nil object in E1 capture the order

Re: Nil object in E1 capture the order

Re: Nil object in E1 capture the order

Re: Nil object in E1 capture the order

Re: Nil object in E1 capture the order

Re: Nil object in E1 capture the order

Re: Nil object in E1 capture the order

Reasonably Related Threads