Django RestApis example – GET/POST/PUT/DELETE requests to PostgreSQL database

#django #restapi #postgres

https://grokonez.com/django/django-restapis-postgresql-example-django-rest-framework-tutorial

In this tutorial, we’re gonna look at way to create Django RestAPIs with Get/Post/Put/Delete requests to interact with PostgreSQL Database using Django REST Framework.

Django RestApi example Overview

Goal

The project create a set of Rest-APIs for GET/POST/UPDATE/DELETE APIs:

GET /customers/: get all customers
GET /customers/[id]: get a customer by id
POST /customers/: save a customer
PUT /customers/update/[id]: update a customer by id
DELETE /customers/[id]: delete a customer by id

We will config the Project to work with PostgreSQL database.

Project structure

There are several folders and files in our Django project:

customers/apps.py: declares CustomersConfig class (subclass of the django.apps.AppConfig) that represents our Django app and its configuration.
gkzRestApi/settings.py: configures settings for the Django project, including INSTALLED_APPS list with Django REST framework and Customers Application.
customers/models.py: defines Customer data model class (subclass of the django.db.models.Model).
migrations/0001_initial.py: is generated by makemigrations command, includes the code to create the Customer model, will be run by migrate to generate PostgreSQL database table for Customer model.
customers/serializers.py: declares CustomerSerializer class (subclass of rest_framework.serializers.ModelSerializer) for Customer instances to manage serialization to JSON and deserialization from JSON.
customers/views.py: contains methods to process HTTP requests and produce HTTP responses (using CustomerSerializer).
customers/urls.py: defines urlpatterns to be matched with request functions in the views.py.
gkzRestApi/urls.py: defines root URL configurations that includes the URL patterns declared in customers/urls.py.