Sort post data in reverse order with Django's ListView

environment

-Python: 3.8.5 ・ Django: 3.1.2 ・ Virtual environment: venv ・ Editor: Pycharm

things to do

・ I want to reverse the order of postings with a bulletin board application that allows posting.

Advance preparation

-Add the creation date and time created_at (whatever the name is) to the post class of models.py.

• Don't forget to import timezone.

models.py

from django.utils import timezone


class Post(models.Model):
    title = models.CharField(max_length=20)
    content = models.CharField(max_length=140)
    created_at = models.DateTimeField(default=timezone.now)

    def __str__(self):
        return self.title

View

-Import the generic view ListView and inherit it to the PostListView class. -Write the reverse order of created_at of the model created earlier with ʻordering`.

views.py

from django.views.generic import ListView
from .models import Post


class PostListView(ListView):
    model = Post
    context_object_name = 'posts'
    ordering = ['-created_at']
    template_name = 'index.html'

Should have been done

I was able to do this. If it doesn't seem to be reflected well, try migration or double check for code mistakes.