Uninitialized constant Product

Rails
1

I am actually following the instructions/code snippets from “Agile Web
Development with Rails” and got as far as page 73 where I did ruby
script/generate controller Store index, then edited

store_controller.rb to
class StoreController < ApplicationController
def index
@products = Product.salable_items
end
end

and product.rb to:
def self.salable_items
find(:all,
:conditions => “date_available <= now()”,
:order => “date_available desc”)
end

but it keeps showing this error in http://localhost:3000/store/ :
NameError in StoreController#index

uninitialized constant Product

RAILS_ROOT: script/…/config/…
Application Trace | Framework Trace | Full Trace

/usr/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:100:in
const_missing' /usr/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:131:in const_missing’
/usr/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:133:in
send' /usr/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:133:in const_missing’
app/controllers/store_controller.rb:3:in `index’

FWIW index.rhtml reads:

<% for product in @products %> 
<td>
  <img src="<%= product.image_url %>"/>
</td>

<td width="450">
  <h3><%=h product.title %></h3>
  <small>
     <%= product.description %>
  </small>
  <br/>
  <strong>$<%= sprintf("%0.2f", product.price) %></strong>
  <%= link_to 'Add to Cart',
              :action => 'add_to_cart',
              :id     => product %>
  <br/>
</td>

<% end %>

2

Solved! Use the foloowing product.rb instead:

class Product < ActiveRecord::Base

validates_presence_of :title
validates_presence_of :description
validates_presence_of :image_url
validates_uniqueness_of :title
validates_numericality_of :price
validates_format_of :image_url,
:with => %r{http:.+.(gif|jpg|png)$}i,
:message => “must be a URL for a GIF, JPG,
or PNG image”

Return a list of products we can sell (which means they have to be

available). Show the most recently available first.

def self.salable_items
find(:all,
:conditions => “date_available <= now()”,
:order => “date_available desc”)
end

protected

Validate that the product price is a positive Float.

def validate #:doc:
errors.add(:price, “should be positive”) unless price.nil? || price

= 0.01
end

end

3

drat! I still get the error when using the so-called “solved” code. Is
there good code elsewhere?