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
has_many :bill_items, :before_add => :set_nestprivate def set_nest(bill_item) bill_item.bill ||= self end
In Rails 4 (didn't test on earlier versions) you can access the parent model by setting the inverse_of option on has_many or has_one:
class Bill < ActiveRecord::Base has_many :bill_items, inverse_of: :bill belongs_to :store accepts_nested_attributes_for :bill_itemsendDocumentation: Bi-directional associations
The bill_item.bill should be available , you could try to do a raise self.bill.inspect to see if it's there or not, but i think the problem is elsewhere.