svs

class QuotationsController  < ApplicationController
  def index
    @params = QuotationsIndexParams.new(params)
    (redirect_to request.referer || quotations_path, :error => "Bad Request", :status => 400 and return) unless @params.valid?
    @quotations = Quotation.search(@params.search_params).
                            send(@params.scope, @params.scope_params).
                            sorted_by(@params.sort.to_sym).
                            page(params[:page])
    respond_to do |format|
      format.html # index.html.erb

svs

class FooController < ApplicationController
  def index
    search_params = (params[:quotation] || {}).select{|k,v| !v.blank?}
    q = search_params.delete("user")
    if q
      q = "%#{q}%"
      search_params[:intended_trip] = {:user => {:conditions => ['email ilike ? or first_name ilike ? or last_name ilike ? or   mobile_number ilike ?', q, q, q, q]}} 
    end
    if params[:all] 
      @quotations = Quotation.all(search_params)

svs

require 'forwardable'

class User

  extend Forwardable
  attr_accessor :view_delegate_class
  def_delegators :view_delegate, :full_name
  
  def initialize(first_name, last_name)
    @first_name = first_name  

svs

class Quotation

  include DataMapper::Resource
  # ...snip...
  property :quoted_kms, Float
  property :quoted_per_km, Float
  property :quoted_price, Float

  property :start_date, Date, :required => true
  property :end_date, Date, :required => true

svs

class QuotationStatusPolicy

  def initialize(quotation)
    @quotation = quotation
  end

  # STATUSES
  def unconfirmed?
    [:mildly_interested, :negotiating].include?(quality)
  end

svs

class QuotationWorkflow

  def initialize(object)
    @object = object
  end

  include Workflow

  workflow do
    state :created do

svs

class Quotation 

  # ...snip...

  # methods to be forwarded to the status policy class
  def self.status_policy_methods
    [:unconfirmed?, :expirable?, :approvable?, :rejectable?, :poolable?, :on_holdable?, :payable?, :callbackable?, :sendable?]
  end

  # methods to be forwarded to workflow class

svs

# following are extracts from the relevant classes and not real Ruby code.

class Foo
  belongs_to :user
end

class User
  has n, :foos
end

svs

class ActivityLog

  include DataMapper::Resource

  property :id, Serial
  
  property :type, Discriminator
  property :model_id, Integer

  property :event, String

svs

class FoosController < ActionController::Base

# ..snip ..

  def create
    @foo = Foo.new(params[:foo])
    @foo.save_with_log(current_user)
    # ...
  end