Book Image

Learn Web Development with Python

By : Fabrizio Romano, Gaston C. Hillar, Arun Ravindran
Book Image

Learn Web Development with Python

By: Fabrizio Romano, Gaston C. Hillar, Arun Ravindran

Overview of this book

If you want to develop complete Python web apps with Django, this Learning Path is for you. It will walk you through Python programming techniques and guide you in implementing them when creating 4 professional Django projects, teaching you how to solve common problems and develop RESTful web services with Django and Python. You will learn how to build a blog application, a social image bookmarking website, an online shop, and an e-learning platform. Learn Web Development with Python will get you started with Python programming techniques, show you how to enhance your applications with AJAX, create RESTful APIs, and set up a production environment for your Django projects. Last but not least, you’ll learn the best practices for creating real-world applications. By the end of this Learning Path, you will have a full understanding of how Django works and how to use it to build web applications from scratch. This Learning Path includes content from the following Packt products: • Learn Python Programming by Fabrizio Romano • Django RESTful Web Services by Gastón C. Hillar • Django Design Patterns and Best Practices by Arun Ravindran
Table of Contents (33 chapters)
Title Page
About Packt
Contributors
Preface
Index

Working with unique constraints


Now, we can launch Django's development server to compose and send HTTP requests to understand how unique constraints work when applied to our models. Execute any of the following two commands, based on your needs, to access the API in other devices or computers connected to your LAN. Remember that we analyzed the difference between them in Chapter 13, Creating API Views, in the Launching Django's development server section:

python manage.py runserverpython manage.py runserver 0.0.0.0:8000

After we run any of the previous commands, the development server will start listening at port 8000.

Now, we will compose and send an HTTP request to create a drone category with a name that already exists: 'Quadcopter', as shown below:

http POST :8000/drone-categories/ name="Quadcopter"

The following is the equivalent curl command:

curl -iX POST -H "Content-Type: application/json" -d  '{"name":"Quadcopter"}' localhost:8000/drone-categories/

Django won't be able to persist a DroneCategory...