Creating a RESTful Web API in Django Ngazetungue Muheue [email protected] @muheuenga 

ME Ø Python Software Foundation fellow Ø Python Society of Namibia co-founder Ø PyCon Namibia organiser Ø I work with Python and Django 

RESTFUL WEB API WITH DJANGO 

What does “API” mean? Ø Application Programming Interface Ø Code that allows two software programs to communicate with each other Ø It helps in connecting various software components Ø An API make it easier for developers to use certain technologies in building application using predefined operations. 

What is a REST API? Ø REST is an acronym for Representational State Transfer Ø When Services: use REST architecture , they are called RESTful APIs Ø Set of web address respond with pure information, not formatted web page Ø It returns JSON Ø Surrounded by quotation marks, [],{} and descriptive title for each bit of information GET - Retrieve a resource based on given conditions. POST - create a resource. PUT - update a resource with the given updated attributes. DELETE - delete a resource. When? 

How API work? PyCon Namibia Restaurant Client Chef and Kitchen Response Request Waiter API 

GET request from GitHub's API curl https://api.github.com/users/Ngazetungue 

GET request from GitHub's API Ø Many packages or many way Ø Django Rest framework Ø Sit on top of existing Django code 

Building an “API” Ø Many packages or many way Ø Django Rest framework Ø Sit on top of existing Django code 

DJANGO REST FRAMEWORK 

Django Rest Framework Ø DRF is a Third Party Application that we will use in conjunction with our own application to create a REST API. Ø It provides us with many features that connect deeply with Django’s existing structures Ø Help us to create RESTful HTTP resources that correspond to the models we create Ø Sit on top of existing Django code 

Anatomy of Django Rest framework? 

FREE TICKETS API 

Building the model 

Building the Serializer Ø Serializers allow object state to be translated into a format that can be stored or transmitted and be reconstructed later on. Ø The serializers in REST framework work very similarly to Django’s Form and ModelForm classes. Ø Serializers allow complex data such as querysets and model instances to be converted to native Python datatypes Ø Easily rendered into JSON, XML or other content types 

Building the Viewset 

Building URLS with the Router 

Accessing the API Operation HTTP Method ØCreate POST ØRead GET ØUpdate PUT, PATCH ØDelete DELETE 

Server / Admin 

API - JSON Operation HTTP Method ØCreate POST ØRead GET ØUpdate PUT, PATCH ØDelete DELETE 

Protecting our data Ø Read only Viewsets Ø Authentication Ø Restricting specific actions 

Always visit Ø https://www.django-rest-framework.org/ Ø https://www.djangoproject.com/ Ø https://www.python.org/ RESOURCES Source code – Ticket Api Ø https://github.com/Ngazetungue/restticketapi My slide: https://speakerdeck.com/muheuenga20/djangowebapi 

Thanks