Django model inheritance with proxy models

                  from django.db import models


class Post(models.Model):
    title = models.CharField(max_length=200)
    content = models.TextField()
    status = models.CharField(max_length=20)
    published_at = models.DateTimeField(null=True)

    class Meta:
        ordering = ['-published_at']


class PublishedPostManager(models.Manager):
    def get_queryset(self):
        return super().get_queryset().filter(status='published')


class PublishedPost(Post):
    """Proxy model showing only published posts."""

    objects = PublishedPostManager()

    class Meta:
        proxy = True
        ordering = ['-published_at']

    def publish(self):
        """Publish this post."""
        self.status = 'published'
        from django.utils import timezone
        self.published_at = timezone.now()
        self.save()


class FeaturedPost(Post):
    """Proxy for featured posts with different display."""

    class Meta:
        proxy = True
        verbose_name = 'Featured Post'

    def __str__(self):
        return f'⭐ {self.title}'