Discriminator sample

models.py

class AssetTask(models.Model):
    TASK_TYPE = (
                     (0 , _('normal')),
                     (1 , _('failure')),
                     (2 , _('duplicate')),
                     (99, _('unknown')),
                     )
        
    task_type = models.IntegerField(_('task type'), choices=TASK_TYPE, default=0)

    asset = models.ForeignKey(Asset)
    task = models.ForeignKey(Task)