def max_revision(cls): """Returns the max revision number across all units.""" return max_column(cls.objects.all(), 'revision', 0)
def get_max_unit_revision(self): return max_column(self.unit_set.all(), 'revision', 0)
def max_index(self): """Largest unit index""" return max_column(self.unit_set.all(), 'index', -1)