How to make multiple templates in one model in django?

Question

Django

Please tell me how to get several templates in the DetailView model depending on the field of the model.
For example, there is a News model with the Article field. How to output a template depending on the article?
And if the template with the given article is not found, get the standard one.
Model example:

class News(models.Model):
    created = models.DateTimeField(auto_now_add=True)
    article = models.CharField(blank=False,
                               null=False,
                               default="",
                               max_length=50,
                               verbose_name="Артикул",
                               db_index=True,
                               unique=True)

Answer 1

def get_template_names(self):