The simplest way to add polling to Django with HTMX 🗳️

So, you want to update your data every few seconds? I'll show you how to add polling to Django with HTMX (HTMX lets you add javascript without writing any javascript).

There will be 4 super simple steps:

Setup a Django app
Add a data dashboard (showing new sales) with your Django app
Add HTMX to update the dashboard every few seconds
Style the dashboard

Here's my final styled output, after using a draft from Photon Designer:

And here's a video guide (following the below written guide) featuring me 🙂:

1. Setup a Django app

pip install --upgrade django faker

django-admin startproject core .
python manage.py startapp sim

Add our app sim to the INSTALLED_APPS in settings.py:

# settings.py
INSTALLED_APPS = [
    'sim',
    ...
]

2. Add a data dashboard (showing new sales)

Add your views

Add the following views to your views.py file:

from django.shortcuts import render
from faker import Faker
from random import randint

fake = Faker()

def index(request):
    purchases = [
        {"name": "Computing for Beginners", "category": "Book", "price": "$29.99", "buyer": "mr-celloist1@gmail.com"},
        {"name": "Computing for Beginners", "category": "Book", "price": "$29.99", "buyer": "ztod-a@gmail.com"},
        {"name": "Why the President is secretly turning into a cat - And not how you think", "category": "Video", "price": "$9.75", "buyer": "alex.g@gmail.com"},
        {"name": "Computing for Beginners", "category": "Book", "price": "$29.99", "buyer": "rob.moggak@gmail.com"},

    ]
    return render(request, 'index.html', context={"purchases": purchases})

def get_new_purchases(request):
    new_purchases = []
    for _ in range(randint(0, 2)):  # generate random purchases.
        purchase = {
            "name": f"Computing for a {fake.job()}",
            "category": "Book",
            "price": f"${randint(10, 100)}.{randint(0, 99)}",
            "buyer": fake.email()
        }
        new_purchases.append(purchase)

    return render(request, 'table-rows.html', context={"purchases": new_purchases})

Add your templates

Create a new folder called templates in the sim app folder
Add the following template called table-rows.html to the templates folder:

{% for purchase in purchases %} {% include 'table-row.html' with
purchase=purchase %} {% endfor %}

Add the following template called table-row.html to the templates folder:

<tr>
  <td>
    <span>{{ purchase.price }}</span>
  </td>
  <td>{{ purchase.name }}</td>
  <td>{{ purchase.category }}</td>
  <td>{{ purchase.buyer }}</td>
  <td>{% now 'H:m:s d/m/Y' %}</td>
  <td><a>More</a></td>
</tr>

Add the following template called index.html to the templates folder:

<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <script
      src="https://unpkg.com/htmx.org@1.9.12"
      integrity="sha384-ujb1lZYygJmzgSwoxRggbCHcjc0rB2XoQrxeTUQyRjrOnlCoYta87iKBWq3EsdM2"
      crossorigin="anonymous"
    ></script>
    <script src="https://cdn.tailwindcss.com"></script>
    <title>Sales</title>
  </head>
  <div>
    <header>Your Sales on {% now 'D M Y' %}</header>
    <div>
      <div>
        <div>
          <table>
            <thead>
              <tr>
                <th>Price</th>
                <th>Product</th>
                <th>Category</th>
                <th>Customer</th>
                <th>Time</th>
                <th><span>More</span></th>
              </tr>
            </thead>
            <tbody id="table-body">
              {% include 'table-rows.html' with purchases=purchases %}
            </tbody>
          </table>
        </div>
      </div>
    </div>
  </div>
</html>

Add your urls

Add the following urls to your core/urls.py file:

from django.contrib import admin
from django.urls import path, include

urlpatterns = [
    path('admin/', admin.site.urls),
    path('', include('sim.urls')),
]

Create a new file called urls.py in the sim app folder and add the following:

from django.contrib import admin
from django.urls import path

from . import views

urlpatterns = [
    path('', views.index, name='index'),
    path('get-new-purchases', views.get_new_purchases, name='get-new-purchases'),
]

3. Add htmx to update the dashboard every few seconds

Update your index.html template to be the following:

<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <script
      src="https://unpkg.com/htmx.org@1.9.12"
      integrity="sha384-ujb1lZYygJmzgSwoxRggbCHcjc0rB2XoQrxeTUQyRjrOnlCoYta87iKBWq3EsdM2"
      crossorigin="anonymous"
    ></script>
    <script src="https://cdn.tailwindcss.com"></script>
    <title>Sales</title>
  </head>
  <div>
    <header>Your Sales on {% now 'D M Y' %}</header>
    <div>
      <div>
        <div>
          <table>
            <thead>
              <tr>
                <th>Price</th>
                <th>Product</th>
                <th>Category</th>

                <th>Customer</th>
                <th>Time</th>
                <th>
                  <span>Edit</span>
                </th>
              </tr>
            </thead>
            <tbody id="table-body">
              {% include 'table-rows.html' with purchases=purchases %}
              <div
                hx-get="/get-new-purchases"
                hx-trigger="every 2s"
                hx-swap="afterbegin"
                hx-target="#table-body"
              ></div>
            </tbody>
          </table>
        </div>
      </div>
    </div>
  </div>
</html>

That's it! You've just added polling to your Django app with HTMX.

Tom Dekan