Rails - Nov 2009 - Problem with association when getting a validation error on update

Quick overview:

2 classes-

class Building < ActiveRecord::Base
  has_many :styles, :dependent => :destroy
  validates_presence_of :address1
  accepts_nested_attributes_for :styles, :allow_destroy => true
end

class Style < ActiveRecord::Base
  belongs_to :building
end

The sequence of my problem is as follows:

- Edit building view and retrieve is different styles (so I can
manipulate them through  accepts_nested_attributes_for)
- I delete one of the mandatory fields in building (on testing
purpose)
- Using javascript I add a new style to the form so it saves on update
new attribute and association
- Submit update form
- Validation detects an error (one mandatory field in building is
missing)
- Edit view is rendered with validation error
And here is my problem:
 - The style I added before shows now is showing as if it was already
saved. And it is not.
- I add the missing field to building
- Submit Update
- I get this error:
expected Array (got Hash) for param `styles_attributes''

How can I access the update object after validation fails and hasn''t
been saved?

Thanks a lot!


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