Deleting model using optimistic locking results in ActiveRecord::StaleObjectError

Rails
1

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.

2

The only workaround to this I’ve been able to find is to use :dependent
=>
:delete_all. This performs a general delete of related objects and
doesn’t
update the lock_version on the parent.

Cathal.

3

Hi Coriordan,
That worked for me, many thanks, but only drawback is, delete_all wont
call
the callbacks in children classes.