from django.db import models
class Post(models.Model):
    title = models.CharField(max_length=150, db_index=True)
    slug = models.CharField(max_length=150, unique=True, blank=True)
    body = models.TextField(blank=True, db_index=True)
    date_pub = models.DateTimeField(auto_now_add=True)
    category = models.ForeignKey('Category', on_delete=models.CASCADE, related_name='posts')
    tags = models.ForeignKey('Tag', on_delete=models.CASCADE)
    def __str__(self):
        return self.title
class Category(models.Model):
    title = models.CharField(max_length=150, db_index=True)
    slug = models.CharField(max_length=150, unique=True, blank=True)
    def __str__(self):
        return self.title
class Tag(models.Model):
    title = models.CharField(max_length=150, db_index=True)
    slug = models.CharField(max_length=150, unique=True, blank=True)
    def __str__(self):
        return self.title

 from django.views.generic import View
from django.shortcuts import render
from .models import *
def news_list(request):
    posts = Post.objects.all()
    context = {'posts': posts}
    return render(request, 'news/post/news_list.html', context)
def tags_list(request):
    tags = Tag.objects.all()
    context = {'tags': tags}
    return render(request, 'news/tag/tags_list.html', context)
class Tag_Detail(View):
    def get(self, request, slug):
        tag = Tag.objects.get(slug__iexact=slug)
        context = {'tag': tag}
        return render(request, 'news/tag/tag_detail.html', context)

 {% block content %}
    {% for post in tag %}
        {{ post.title }}
    {% endfor %}
{% endblock content %}