Adds a virtual attribute to models, that plays nice with forms etc

example:

class MyModel < ActiveRecord::Base
  virtual_attribute :foo, :boolean => true, :attr_type => :attr_accessible
  virtual_attribute :bar, :boolean => true, :attr_type => :attr_accessible
end

params = {:foo => '1', :bar => 'false'}
thing = MyModel.new(params)

thing.foo #=>true
thing.bar #=> false

Virtual attributes can be set to :boolean => true

• This will parse ['yes', 'true', '1', 1] to be true
• and ['no', 'false', '0', 0] to be false
• otherwise will be nil
• this allows them to be used transparently with checkboxes etc in forms

If using attr_accessible in your model, the virtual attribute should be added to the list to, or you can pass:

:attr_type => :attr_accessible 

as an option as shown above to have it done for you

Will document better later, until then: phil at latentflip dot com