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def if_multiple_pages?(collection, per_page = 10)
  pages = (collection.size / (per_page || 10).to_f).ceil
  yield pages if pages > 1
end

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class Product < ActiveRecord::Base
  # ... other code

  has_and_belongs_to_many :products,
                          :join_table => "related_products",
                          :foreign_key => "product_a_id",
                          :association_foreign_key => "product_b_id",
                          :finder_sql => 'SELECT DISTINCT products.* FROM products INNER JOIN related_products ON (#{id} = related_products.product_a_id OR #{id} = related_products.product_b_id) WHERE (products.id <> #{id})',
                          :insert_sql => 'INSERT INTO related_products (product_a_id, product_b_id) VALUES (#{id}, #{record.id})',
                          :delete_sql => 'DELETE FROM related_products WHERE (product_a_id = #{id} AND product_b_id IN (#{record.id})) OR (product_a_id = #{record.id} AND product_b_id IN (#{id}))',

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class Category < ActiveRecord::Base
  has_many :categories, :order => 'order_by asc'
  belongs_to :category

  scope :order, order("order_by asc")
  scope :main, where(:category_id => nil)

  def options_for_select( selected = nil )
    selected_attribute = ' selected="selected"' if self == selected
    options_output = "<option value='#{self.id}'#{selected_attribute}>#{self.title}</option>"

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#
# Credit goes to jamis
# http://37signals.com/svn/posts/2742-the-road-to-faster-tests

#
# wipe almost all of the instance variables from the object

teardown :scrub_instance_variables

@@reserved_ivars = %w(@loaded_fixtures @test_passed @fixture_cache @method_name @_assertion_wrapped @_result)

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Factory.define :album do |album|
  album.name 'Album Name'
  album.description 'Album Description'
  album.active true
  album.association :cover_image, :factory => :image
end

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(('a'..'z').to_a + ('A'..'Z').to_a + (0..9).to_a).sample(30).join #=> "yh8D5NrognVw16GldXPcCxJ24ALU3W"

# with special characters
(('a'..'z').to_a + ('A'..'Z').to_a + (0..9).to_a + ['!','@','#','$','%','^','&','*']).sample(30).join #=> "Nc&inVolamjMLWfsE#k6$D^p2!b@XC"

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def collection_class_name(collection, index)
  if index == 0
    return 'first'
  elsif index == ( collection.size - 1 )
    return 'last'
  end
end

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NOTE: For all installations, as of 1.7, RVM no longer autoloads .rvmrc files. In order to return this
functionality, you MUST add 'export rvm_project_rvmrc=1' to your $HOME/.rvmrc file.
This causes RVM to override 'cd' which, while toggleable even < 1.7, is currently defaulted to 'off'.
This knob returns the previous behaviour to active which causes per-project .rvmrc files to be loaded
once again.

 
Example: echo 'export rvm_project_rvmrc=1' >> $HOME/.rvmrc && rvm reload

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ActionView::Base.field_error_proc = Proc.new do |html_tag, instance|
  if html_tag =~ /<label[^>]+/
    "<div class='field_with_errors'>#{html_tag}".html_safe
  else
    "#{html_tag}</div>".html_safe
  end
end

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require 'rack/deflater'

module Rack
  class Deflater
    class GzipStream
      def each(&block)
        @writer = block
        gzip  =::Zlib::GzipWriter.new(self)
        gzip.mtime = @mtime
        @body.each { |part|