6.5 Iteration A4: Making Prettier Listings 6.3 Iteration A2: Add a Missing Column

edit app/models/product.rb

class Product < ActiveRecord::Base

  validates_presence_of :title, :description, :image_url

  validates_numericality_of :price

  validate :price_must_be_at_least_a_cent

  validates_uniqueness_of :title

  validates_format_of :image_url, :allow_blank => true,

                      :with    => %r{\.(gif|jpg|png)$}i,

                      :message => 'must be a URL for GIF, JPG ' +

                                  'or PNG image.'

protected

  def price_must_be_at_least_a_cent

    errors.add(:price, 'should be at least 0.01') if price.nil? ||

                       price < 0.00

  end

end

get /products/new

post /products

• product[price] => 0.0

get /products/new

post /products

• product[image_url] => /images/utj.jpg
• product[price] => wibble
• product[description] => A true masterwork. Comparable to Kafka at his funniest, or Marx during his slapstick period. Move over, Tolstoy, there's a new funster in town.
• product[title] => Pragmatic Unit Testing

edit app/models/product.rb

class Product < ActiveRecord::Base

  validates_presence_of :title, :description, :image_url

  validates_numericality_of :price

  validate :price_must_be_at_least_a_cent

  validates_uniqueness_of :title

  validates_format_of :image_url,

                      :with    => %r{\.(gif|jpg|png)$}i,

                      :message => 'must be a URL for GIF, JPG ' +

                                  'or PNG image.'

protected

  def price_must_be_at_least_a_cent

    errors.add(:price, 'should be at least 0.01') if price.nil? ||

                       price < 0.01

  end

end

6.5 Iteration A4: Making Prettier Listings 6.3 Iteration A2: Add a Missing Column