Rails accepts_nested_attributes_for child doesn't have parent set when validating

Question

I\'m trying to access my parent model in my child model when validating. I found something about an inverse property on the has_one, but my Rails 2.3.5 doesn\'t recognize it, s

Answer 1

I had a similar problem: Ruby on Rails - nested attributes: How do I access the parent model from child model

This is how I solved it eventually; by setting parent on callback

class Parent < AR
  has_one :child, :before_add => :set_nest
  accepts_nested_attributes_for :child

private
  def set_nest(child)
    child.parent ||= self
  end
end