[Rails] deleting model using optimistic locking results in ActiveRecord::StaleObjectError

Hi,

I have a model defined like so:

class Course < ActiveRecord::Base
  has_many :attendances, :dependent => :destroy
  has_many :attendees, :through => :attendances, :source => :user

...

when I attempt to delete a Course model, it results in an ActiveRecord::StaleObjectError. Reviewing the resulting SQL calls shows that the 'lock_version' column gets incremented on each dependent 'Attendance' model that is deleted. When the Course model is deleted, its lock_version no longer matches the persisted row in the database, and hence the StaleObjectError. Any help on how to handle this situation would be greatly appreciated.

regards,
Cathal.

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