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
