Transaction.coffee

# Retrieve a belongsTo association
favourite = @get 'user_favourite'

# I'd like to do the following but it makes the
# record dirty, as user_favourite has changed.
# I really don't want user_favourite being tracked,
# But I want to get it with the initial JSON.
favourite.destroyRecord()
Meducation.store.commit()

# Instead - this works but feels v wrong :)
favourite = @get 'user_favourite'

transaction = Meducation.store.transaction()
transaction.add(fav)
favourite.deleteRecord()
favourite.one "didDelete", =>
    #...

transaction.commit()
transaction.remove(favourite)