Ruby on Rails

Env:  rails 2.2.2
oracle 10g

Have created a table and sequence
--------------------------------
create table products (
id number not null,
title varchar2(100) not null,
description varchar2(255) not null,
image_url varchar2(200) not null,
price number(10,2) not null,
primary key(id)
)

create sequence products_seq
start with 1
increment by 1
nomaxvalue

No errors displaying all the products using the default action index
But when I put show/edit links , it errors out.
Is this show link is not able to get the product id ?
Please help.
route.rb is good. I did look at rake route output.

Error
------

ActionController::RoutingError in Products#index

Showing app/views/products/index.html.erb where line #17 raised:

product_url failed to generate from {:action=>"show",
:controller=>"products", :id=>#<Product id:
#<BigDecimal:506ca20,'0.1E1',4(8)>, title: "Laptop", description:
"Laptop - TODO", image_url: "http://localhost:3000/products/new", price:
#<BigDecimal:506c958,'0.2E4',4(12)>>}, expected: {:action=>"show",
:controller=>"products"}, diff: {:id=>#<Product id:
#<BigDecimal:506c764,'0.1E1',4(8)>, title: "Laptop", description:
"Laptop - TODO", image_url: "http://localhost:3000/products/new", price:
#<BigDecimal:506c69c,'0.2E4',4(12)>>}

Extracted source (around line #17):

14:     <td><%=h product.description %></td>
15:     <td><%=h product.image_url %></td>
16:     <td><%=h product.price %></td>
17:     <td><%= link_to 'Show', product %></td>
18:     <td><%= link_to 'Edit', edit_product_path(product) %></td>
19:     <td><%= link_to 'Destroy', product, :confirm => 'Are you sure?',
:method => :delete %></td>
20:   </tr>

RAILS_ROOT: C:/Documents and Settings/beesaa/Desktop/ruby/web/depot
Application Trace | Framework Trace | Full Trace

C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/routing/route_set.rb:377:in
`raise_named_route_error'
C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/routing/route_set.rb:341:in
`generate'
C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/url_rewriter.rb:208:in
`rewrite_path'
C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/url_rewriter.rb:187:in
`rewrite_url'
C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/url_rewriter.rb:165:in
`rewrite'
C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_controller/base.rb:626:in
`url_for'
C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/helpers/url_helper.rb:85:in
`send'
C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/helpers/url_helper.rb:85:in
`url_for'
(eval):16:in `product_path'
app/views/products/index.html.erb:17
app/views/products/index.html.erb:11:in `each'
app/views/products/index.html.erb:11
app/controllers/products_controller.rb:7:in `index'
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