Note that in the case of identical date values, these methods will use theprimary key as a tie-breaker. This guarantees that no records are skipped orduplicated. That also means you cannot use those methods on unsaved objects.
Note that in the case of identical date values, these methods will use theprimary key as a tie-breaker. This guarantees that no records are skipped orduplicated. That also means you cannot use those methods on unsaved objects.