Destroying Many Records Meeting Criteria
I have an app where there is a User and Comment model. A User has many Comments, and normally I’d use:
has_many comments, :dependent => :destroy
to make sure all of the related records are destroyed. However, due to unusual circumstances, I couldn’t indicate that relationship in the User model, so I had to determine another way to do this.
What I ended up doing was using an observer:
destroy_all allowed for an efficient way to delete all of the records instead cycling through an array and deleting each record one by one (i.e. comment.destroy(id))