models.py

from django.db import models
from django.contrib.auth.models import User
from django.utils import timezone

import markdown
import hashlib

# Create your models here.
class Category(models.Model):
    name = models.CharField(max_length=100)
    link = models.CharField(max_length=100, unique=True)

    class Meta:
        verbose_name_plural = 'categories'

    def __str__(self):
        return self.name


class Post(models.Model):
    post_title = models.CharField(max_length=200)
    permalink = models.CharField(max_length=100, unique=True)
    post_body = models.TextField('body')
    cache = models.TextField(blank=True, null=True)
    cache_hash = models.CharField(max_length=32, blank=True, null=True)
    pub_date = models.DateTimeField('date published', default=timezone.now)
    published = models.BooleanField(default=False)
    author = models.ForeignKey(User, on_delete=models.CASCADE, default=1, blank=True)
    categories = models.ManyToManyField(Category, blank=True)
    comments = models.BooleanField(default=True)

    def get_rendered(self):
        h = hashlib.md5()
        h.update(bytes(self.post_body, 'utf-8', errors='ignore'))

        if self.cache_hash != h.hexdigest():
            self.cache_hash = h.hexdigest()
            self.cache = markdown.markdown(self.post_body, extensions=[
                'markdown.extensions.extra',
                'markdown.extensions.admonition',
                'markdown.extensions.codehilite'], safe_mode=False)
            self.save()
        return self.cache

    def __str__(self):
        return self.post_title

    class Meta:
        permissions = (
                ("view_drafts", "View anyone's drafts"),
            )

class Page(models.Model):
    page_name = models.CharField(max_length=200)
    permalink = models.CharField(max_length=100, unique=True)
    page_body = models.TextField('body')

    def __str__(self):
        return self.page_name

class MenuLink(models.Model):
    url = models.CharField(max_length=1024)
    text = models.CharField(max_length=200)
    order = models.IntegerField()

    def __str__(self):
        return self.text