REST API

 WHAT IS API?

An API, or application programming interface, is a collection of rules governing how programs and devices connect to and communicate.

API= Application Programming Interface

WHAT IS REST API?

REST APIs are the most often used approach for linking components in microservices systems since they are versatile and lightweight. A REST API is an API that adheres to the REST, or representational state transfer, architectural style's design principles.

REST = Representational State Transfer. REST API is also known as RESTful API.

REST defines four interface constraints:

• Identification of resources
• Manipulation of resources
• Self-descriptive messages
• Hypermedia as the engine of application state

REST framework requires the following:

• Python (3.6,3.7,3.8,3.9,3.10)
• Django (2.2,3.0,3.1,3.2,4.0)
• PostMan

REQUIRED PACKAGES:

We need to install packages to start the process.

• Django (pip install Django)
• Django rest framework (pip install djangorestframework)
• Django cors headers (Django-cors-headers)

BENEFITS OF REST API:

• Scalability
• Flexibility and portability
• Independence

Now let’s create the Django project open the cmd in the desired folder and type the command Django-admin start project DjangoAPI(project name).

File created

Let’s open the visual studio code inside the project path.

Now run the project just type: python manage.py runserver  http://127.0.0.1:8000/

Now let’s create one app enter: python manage.py startapp Employee(enter app name).

App created successfully. Now add the app name in the setting.py

Now create the required models for the app, we need two models for this app

• Departments
• Employees

Now create the database, and install SqLitestudio for creating databases. Open SqLiteStudio and choose the folder and create the database.

After creating the database we need to create serializers (serializers.py)

Enter the URL configurations in URL.py

Enter the URL in POSTMAN and select GET, PUT, DELETE, POST.

CONCLUSION:

A REST API is an application programming interface that conforms to the REST architectural style requirements and allows interaction with RESTful web services.