In Django - Model Inheritance - Does it allow you to override a parent model's attribute?

Question

I'm looking to do this:

class Place(models.Model):    name = models.CharField(max_length=20)    rating = models.DecimalField()  class LongNamedRestaurant(Place):  # Subclassing `Place`.    name = models.CharField(max_length=255)  # Notice, I'm overriding `Place.name` to give it a longer length.    food_type = models.CharField(max_length=25) 

This is the version I would like to use (although I'm open to any suggestion): http://docs.djangoproject.com/en/dev/topics/db/models/#id7

Is this supported in Django? If not, is there a way to achieve similar results?

Answer 1

Updated answer: as people noted in comments, the original answer wasn't properly answering the question. Indeed, only the LongNamedRestaurant model was created in database, Place was not.

A solution is to create an abstract model representing a "Place", eg. AbstractPlace, and inherit from it:

class AbstractPlace(models.Model):     name = models.CharField(max_length=20)     rating = models.DecimalField()      class Meta:         abstract = True  class Place(AbstractPlace):     pass  class LongNamedRestaurant(AbstractPlace):     name = models.CharField(max_length=255)     food_type = models.CharField(max_length=25) 

Please also read @Mark answer, he gives a great explanation why you can't change attributes inherited from a non-abstract class.

(Note this is only possible since Django 1.10: before Django 1.10, modifying an attribute inherited from an abstract class wasn't possible.)

Original answer

Since Django 1.10 it's possible! You just have to do what you asked for:

class Place(models.Model):     name = models.CharField(max_length=20)     rating = models.DecimalField()      class Meta:         abstract = True  class LongNamedRestaurant(Place):  # Subclassing `Place`.     name = models.CharField(max_length=255)  # Notice, I'm overriding `Place.name` to give it a longer length.     food_type = models.CharField(max_length=25)