Hi,
I have two model classes; Tune and Title and they are joined in a many to many relationship through a Variation class. Here's some stub code of the models:
class Tune < ActiveRecord::Base has_many :variations, :dependent => :destroy has_many :titles, :through => :variations ... class Title < ActiveRecord::Base has_many :variations, :dependent => :destroy has_many :tunes, :through => :variations ... class Variation < ActiveRecord::Base belongs_to :tune belongs_to :title ...
In my TunesController I create a new Tune, Variation and Title. I set the :tune and :title attributes in the Variation, and add the Variation to the tune and title's :variations arrays.
The problem is that when I save the Tune, I get the following error: SQLite3::SQLException: variations.title_id may not be NULL: INSERT INTO "variations" ("updated_at", "title_id", "tune_id", "created_at") VALUES('2008-09-18 12:21:52', NULL, NULL, '2008-09-18 12:21:52')
I assumed that Rails would know that the Tune, Variation and Title are all new objects and perform the save of the Tune and Title, get their IDs to store in the Variation and lastly save the Variation.
Any help or pointers for where to look are greatly appreciated.
Thanks, Pat