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So I don't have a model called Person, but I use hashes like {:name => "Siddharth", :sex => "Y"}. Great. Now I want to validate the presence of certain fields before persisting to the database. What do I do?

Module PersonValidation
  function validate_presence_of_name(person_hash)
    person_hash[:errors][:name] = "EEENKKK!" unless person_hash[:name]
  end
  
  ...
 ...

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describe Document do
  context "with a scan" do
    subject {FactoryGirl.build(:scannable)}
    it {should have_events([:scan])}
  end
  
  context "taggable" do
    subject { FactoryGirl.build(:taggable) }

    it {should have_events([:to_edit])}

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 it "should move properly between states" do
      @doc = Factory.build(:taggable, :user => @customer)
      @doc.scan!(@customer)
      @doc.scanned?.should == true
      @doc.digi_document_state_transitions.count.should == 1
      expect { @doc.tag_complete!}.should raise_exception                        # should not 'complete'
      @doc.completed?.should == false
      @doc.to_edit!(@customer)                                                   # should 'edit'
      @doc.editing?.should == true
      @doc.digi_document_state_transitions.count.should == 2

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class Document

  property :name, Text
  ....   # all the other properties
  ....
  

  property :scanned_on, Date
  property :tagged_on, Date
  property :approved_on, Date

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class Document
  #  ....
  #  ..snip...
  #  ....
  workflow do
    state :created do
      event :scan, :transitions_to => :scanned, :if => Proc.new{|t| !(t.scans.empty?)}
      event :to_edit, :transitions_to => :editing
    end
    state :scanned do

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# API is POST {:action => "update", :event => "approve", :id => 3, :document => {:comment => "some comment"}}
def update
  @document = Document.get(params[:id])
  if @document.send(params[:event], current_user)
    @document.update_attributes(params[:document])
  end
  respond_to do |format|
    # ...
    # ...
  end

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class Person

  attr_accessor :name, :role

  def initialize(name, role)
    @name, @role = name, role
  end

  # options is a Hash with the following keys
  # :to -> the role to set to

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class UserStatistics

  # This class is responsible for aggregating User data into meaningful reports
 
 attr_accessor :user

  #
  #
  # ... snip ...
  #

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class Search

  ALLOWED_MODELS = [:receipt, :business_card, :other_document]
  SEARCH_COLS = {
    :receipt => [:title,:organisation],
    :business_card => [:first_name,:last_name,:organisation,:designation,:locality,:city,:pincode, :email, :twitter, :mobile, :notes],
    :other_document => [:title,:notes]
  }
  NON_SEARCH_KEYS = [:tags, :q, :model, :all, :only, :from, :to, :by, :page]

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ItemsController
  unauthorised
    does not edit
    does not new
    does not index
    does not show
    does not update
  authorised
    index