old_contents: from django.db import models
  from django.contrib.auth.models import User
  
  from hadrian.utils import slugs
  from ckeditor.fields import RichTextField
  from taggit.managers import TaggableManager
  
  from .managers import PostManager
  
  
  class Post(models.Model):
      title = models.CharField(blank=False, max_length=450)
      slug = models.SlugField(unique=True)
      image = models.ImageField(blank=True, upload_to='blog/images', null=True)
      body = RichTextField()
      excerpt = models.TextField(blank=True, null=True)
      meta_description = models.CharField(blank=True, max_length=350, help_text='Meta Description for SEO')
      author = models.ForeignKey(User)
      published_date = models.DateTimeField()
      published = models.BooleanField()
  
      tags = TaggableManager()
  
      objects = PostManager()
  
      def __unicode__(self):
          return self.title
  
      @property
      def get_author_display(self):
          return "%s %s" % (self.author.first_name, self.author.last_name)
  
      def save(self, *args, **kwargs):
          slugs.unique_slugify(self, self.title)
          super(Post, self).save(*args, **kwargs)
  
      @models.permalink
      def get_absolute_url(self):
          return ('post_detail_view', {}, {'slug': self.slug})
  
  
new_contents: from django.db import models
  from django.contrib.auth.models import User
  
  from hadrian.utils import slugs
  from ckeditor.fields import RichTextField
  from taggit.managers import TaggableManager
  
  from .managers import PostManager
  
  
  class Post(models.Model):
      title = models.CharField(blank=False, max_length=450)
      slug = models.SlugField(unique=True)
      image = models.ImageField(blank=True, upload_to='blog/images', null=True)
      body = RichTextField()
      excerpt = models.TextField(blank=True, null=True)
      meta_description = models.CharField(blank=True, max_length=350, help_text='Meta Description for SEO')
      author = models.ForeignKey(User)
      published_date = models.DateTimeField()
      published = models.BooleanField()
  
      tags = TaggableManager()
  
      objects = PostManager()
  
      def __unicode__(self):
          return self.title
  
      @property
      def get_author_display(self):
          return "%s %s" % (self.author.first_name, self.author.last_name)
  
      def save(self, *args, **kwargs):
          slugs.unique_slugify(self, self.title)
          super(Post, self).save(*args, **kwargs)
  
      @models.permalink
      def get_absolute_url(self):
          return ('post_detail_view', {}, {'slug': self.slug})
          
      class Meta:
      	ordering = ['-published_date']
  
  
subject: Add sort by publish date.