text: from django.db import models
  from django.contrib.auth.models import User
  from django.urls import reverse
  
  # Create your models here.
  
  
  class Category(models.Model):
      name = models.CharField(max_length=100)
  
      def __str__(self):
          return self.name
  
  
  class Tag(models.Model):
      name = models.CharField(max_length=100)
  
      def __str__(self):
          return self.name
  
  
  class Post(models.Model):
      title = models.CharField(max_length=70)
      body = models.TextField()
      created_time = models.DateTimeField()
      modified_time = models.DateTimeField()
      excerpt = models.CharField(max_length=200, blank=True)
      category = models.ForeignKey(Category)
      tags = models.ManyToManyField(Tag, blank=True)
      author = models.ForeignKey(User)
  
      def __str__(self):
          return self.title
  
      def get_absolute_url(self):
          return reverse('blog:detail', kwargs={'pk': self.pk})
  