Sanity for free 6

Posted by pratik
on Sunday, October 05

Just an experiment.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62

require 'erb'

class ActionView::Base
  def _copy_ivars_from_controller_with_sanity
    variables = _copy_ivars_from_controller_without_sanity
    variables.each do |v|
      ivar = instance_variable_get(v)
      if ivar.is_a?(Array)
        values = ivar.map do |subivar|
          subivar.respond_to?(:to_sanity) ? subivar.to_sanity : subivar
        end
        instance_variable_set(v, values)
      elsif ivar.respond_to?(:to_sanity)
        instance_variable_set(v, ivar.to_sanity)
      end
    end
  end

  alias_method_chain :_copy_ivars_from_controller, :sanity
end

module Sanity
  class Cleaner
    Object.instance_methods.each do |m|
      delegate m, :to => :@model unless m =~ /^__/
    end
    
    def initialize(model)
      @model = model
    end

    def method_missing(method_id, *arguments, &block)
      if @model.class.sanitizable_columns.include?(method_id)
        value = @model.send(method_id)
        arguments.first == false ? value : ERB::Util.h(value)
      else
        @model.send(method_id, *arguments, &block)
      end
    end
  end

  module Model
    def self.included(base)
      base.send :include, InstanceMethods
      base.send :extend, ClassMethods
    end
    
    module InstanceMethods
      def to_sanity
        Cleaner.new(self)
      end
    end
    
    module ClassMethods
      def sanitizable_columns
        @sanitizable_columns ||= content_columns.find_all {|c| c.text? }.map(&:name).map(&:to_sym)
      end
    end
  end
end

ActiveRecord::Base.send :include, Sanity::Model

And then..

1
2

<%= @item.name # sanitized name %>
<%= @item.name(false) # unsanitized name  %>

I know, too many methods are missing, edge cases and what not. But hey, it’s just an idea/experiment.

Comments

Leave a response

  1. ed – October 19, 2008 @ 04:40 AM

    Great code.. I really like the way you code…

    I would recommend you to consider using markaby instead of erb!

    Thanks

  2. dan quotes – October 20, 2008 @ 05:00 AM

    I like every coder who uses instance_variable_set! It is great… I honestly used instance_variable_set a lot in many hard problems.

    Thanks, Dan

  3. Mislav – October 21, 2008 @ 01:25 AM

    Hello, nice site. Great to see you using the ternary operator. I think more coders should use the ternary operator

  4. sam – October 21, 2008 @ 10:26 PM

    I am kinda of interested in using _ in method names? i feel it can be tricky to remember… i like the use of send.. generally well written code..

    Thanks

  5. sensei – October 25, 2008 @ 04:28 AM

    You know that the noun of sanitize is sanitization, not sanity, don’t you? ;-)

  6. numsbessomy – May 01, 2010 @ 02:06 AM

    http://www.smelldelicious.com/v/vspfiles/templates/Perfume2/images/logos/emporio.gif

    Hello Everybody

    During the holiday season when your searching for his or her birthday women and mens perfume gift sets you may need help finding the most current colognes for your girlfriend, wife, husband or…just a special person. There is a simple solution for actively searching for brand name perfumes & birthday gifts – even though there are millions of colognes & perfumes to choose from.

    www.SmellDelicious.com website store specializes in Men’s Gift Sets and stocks Love Letter & Sesame Street and thousands of other womens perfumes.

    Here is some of our popular womens perfumes and colognes – The Perfect decision for a special colleague Animale Parfums & Anna Sui & Halle Berry & Halston & Bruno Banani & Burberry & Molinard & Parfums Gres & Leonard & Mont Blanc & Jean Desprez & Jean Louis Scherrer & Giorgio Armani & Giorgio Beverly Hills & Bruno Banani & Burberry & CMG Worldwide & Cofci & Gianni Versace & Gilles Cantuel & Alain Delon & Albert Nipon & Elizabeth Taylor & Donna Karan & DreamWorks Dsquared2 & Elite Model & Balenciaga & Banana Republic & Borghese & Borsari & Montana & Luciano Soprani & Parfums Full Metal Helmut & Lanvin.

    http://www.perfume.com/images/family_banners/mossy-woods_women.jpg?1268443664

Comment