[Fixed]-Default the title to be a combination of fields

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I would use properties

class Listing(models.Model):
    slug = models.SlugField(unique=True)
    title = models.CharField(max_length=100)
    post_date = models.DateField(auto_now_add=True, auto_now=False)
    locality = models.CharField(max_length=100)

   @property
   def default_title(self):
       return '%s house in %s' % (self.title, self.locality)

   @property
   def default_slug(self):
       return '%s' % slugify(self.default_title)

one advantage of property is that you can use it in template as if it were a normal class attribute: 

{{ listing.default_title }}
👤doniyor

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