Create a new model which have all fields of currently existing model

Question

I am having a model `Player` with my django app . ``` class Player(models.Model): """ player model """ name = models.CharField(max_length=100, null=True, blank=True) date_created = models.DateTimeField(auto_now_add=True) last_updated = models.DateTimeField(auto_now=True) hash = models.CharField(max_length=128, null=True, blank=True) bookmark_url = models.CharField(max_length=300, null=True, blank=True) ``` As per my requirement i need to create a new model `BookmarkPlayer`which will have all fields of `Player` model. Right now i have two things into my mind to do this . - I can extend Player class for BookmarkPlayer model. ``` class BookmarkPlayer(Player): """ just a bookmark player""" class Meta: app_label = "core" ``` - I can define all fields of Player model into BookmarkPlayer model. ``` class BookmarkPlayer(models.Model): """ bookmark player model """ name = models.CharField(max_length=100, null=True, blank=True) date_created = models.DateTimeField(auto_now_add=True) last_updated…

Accepted Answer

If your `BookmarkPlayer` needs the same data but in a different table, an abstract base model is the best way to go:

```
class BasePlayer(models.Model):
    name = models.CharField(max_length=100, null=True, blank=True)
    date_created = models.DateTimeField(auto_now_add=True)
    last_updated = models.DateTimeField(auto_now=True)
    hash = models.CharField(max_length=128, null=True, blank=True)
    bookmark_url = models.CharField(max_length=300, null=True, blank=True)

class Meta:
        abstract = True

class Player(BasePlayer):
    """ player model """
    pass

class BookmarkPlayer(BasePlayer):
    """ bookmark player model """
    pass
```

This way, both `Player` and `BookmarkPlayer` inherit their fields from the `BasePlayer` model, but because `BasePlayer` is abstract, the models are completely decoupled.

Multi-table inheritance on the other hand would still save the fields in a single table, but add an extra table for the `BookmarkPlayer` with an implicit `OneToOneField` to the `Player` table.

Create a new model which have all fields of currently existing model

Solution

Problem