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On this page
  • What is Django
  • How to code this sample
  • Add a simple route
  • New Route - Dynamic content
  • New Route - Random Images
  • Resources

Was this helpful?

  1. Free Samples
  2. Django Samples

Django Routing Sample

Open-source sample provided by AppSeed to explain Django routing mechanism.

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Last updated 2 years ago

Was this helpful?

This sample might be useful to beginners to understand how the routing system works in Django Web Framework. In the end, the sample will route three things: a default route that shows a simple Hello World, a 2nd route that displays a random number at each page refresh, and the last route that shows a random image pulled from the internet.

Resources

  • - the source code (Github/MIT License)

  • More provided with authentication, basic modules

What is Django

Django is a high-level Python Web framework that encourages rapid development and clean, pragmatic design. Built by experienced developers, it takes care of much of the hassle of Web development, so you can focus on writing your app without needing to reinvent the wheel. It’s free and open source.

Read more about - quick introduction

How to code this sample

This sample can be coded from scratch by following the steps below.

Check Version

$ python --version
Python 3.8.4 <-- All good

Create/activate a virtual environment - Unix-based system

$ # Virtualenv modules installation
$ virtualenv env
$ source env/bin/activate  

For Windows, the syntax is slightly different

$ # virtualenv env
$ # .\env\Scripts\activate

Install Django

$ pip install django

Create a new Django Project

$ mkdir django-sample-urls
$ cd django-sample-urls

Inside the new directory, we will invoke startproject subcommand

$ django-admin startproject config .

Note: Take into account that . at the end of the command.

Setup the database

$ python manage.py makemigrations
$ python manage.py migrate

Start the app

$ python manage.py runserver 
$
$ # Access the web app in browser: http://127.0.0.1:8000/

At this point we should see the default Django page in the browser:

Create a new Django app

$ python manage.py startapp sample

Add a simple route

Let's edit sample/views.py as shown below:

def hello(request): 
    return HttpResponse("Hello Django") 

Configure Django to use the new route - update config/urls.py as below:

from django.contrib import admin
from django.urls  import path
from django.conf.urls import include, url   # <-- NEW
from sample.views import hello              # <-- NEW

urlpatterns = [
    path('admin/', admin.site.urls),
    url('', hello),                         # <-- NEW
]

In other words, the default route is served by hello method defined in sample/views.py.

New Route - Dynamic content

Let's create a new route that shows a random number - sample/views.py.

...
from random import random
...
def myrandom(request): 
    return HttpResponse("Random - " + str( random() ) ) 

The new method invoke random() from Python core library, converts the result to a string and returns the result. The browser output should be similar to this:

New Route - Random Images

This route will pull a random image from a public (and free) service and inject the returned content into the browser response. To achieve this goal, we need a new Python library called requests to pull the random image with ease.

The controller code should be defined in sample/views.py.

...
import requests
...
def randomimage(request):
    r = requests.get('http://thecatapi.com/api/images/get?format=src&type=png')
    return HttpResponse( r.content, content_type="image/png")

To see the effects in the browser, the routing should be updated accordingly.

# Contents of config/urls.py
...
from sample.views import hello, myrandom, randomimage # <-- Updated 
...
urlpatterns = [
    path('admin/'     , admin.site.urls),
    url('randomimage' , randomimage),                 # <-- New
    url('random'      , myrandom),
    url(''            , hello), 
]

The browser sample output returned by a local iteration:

Resources

Read more about (official docs)

Start fast a new project using development-ready

Django Routing Sample
Django Samples
Django Framework
Python
Django
Django Starters
Django - Default Project Page.
Django Routing - Dynamic Content Route.
Django Routing Sample - Browser output