gistfile1.py

class DatabaseModelBase(models.ModelBase):¬
    _auto_generated_atts = ['id']
¬
    @classmethod¬
    def create(cls, **values):¬
        values = cls.get_auto_generated_values(**values)¬
        if hasattr(cls, 'deleted') and 'deleted' not in values:¬
            values['deleted'] = False¬
        values['created'] = utils.utcnow()¬
        instance = cls(**values).save()¬
        if not instance.is_valid():¬
            raise exception.InvalidModelError(errors=instance.errors)¬
        return instance¬
¬
    @classmethod¬
    def get_auto_generated_values(cls, **values):
        for v in cls._auto_generated_attrs:
          if v not in values:
            values[v] = utils.gen_uuid()
        return values
            
class Action(dbmodels.DatabaseModelBase):
    """Defines an Instance Action."""¬
    _auto_generated_attrs = []
    _data_fields = ['instance_uuid', 'updated_at', 'request_id', 'user_id',¬
                    'start_time', 'finish_time', 'message']¬
    _table_name = 'actions'¬
¬