How can you filter a queryset by default so that no matter where you use the model, the filter will be applied?
This can be achieved by creating a custom Manager and overriding its
For example, if we have a soft delete feature in our app implemented by adding a
deleted column, we can force only returing non-deleted objects by creating a custom model manager which filters for
class BookManager(models.Manager):def get_queryset(self):return super().get_queryset().filter(deleted=False)class Book(models.Model):# ...deleted = models.BooleanField(default=False)objects = BookManager()
Now everytime you query Book objects in your app with
Book.objects , you will only receive books that haven't been deleted.