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Serializer Relations – Django REST Framework:
Serialization is one of the most important concepts in RESTful Webservices. It facilitates the conversion of complex data (such as model instances) to native Python data types that can be rendered using JSON, XML, or other content types. In Django REST Framework, we have different types of serializers to serialize object instances, and the serializers have different serializer relations to represent model relationships. In this section, we will discuss the different serializer relations provided by Django REST Framework Serializers.
Before working on Django REST Framework serializers, you should make sure that you already installed Django and Django REST Framework in your virtual environment. You can check the below tutorials:

Create virtual environment using venv | Python
Django Installation
Django REST Framework Installation

Next, you can create a project named emt (employee management tool) and an app named employees. Refer to the following articles to check how to create a project and an app in Django.
How to Create a Basic Project using MVT in Django?
How to Create an App in Django?

In this section, we will be using PostgreSQL. You have to create a database named emt in PostgreSQL. You can check the below link for installation.

Install PostgreSQL on Windows

Note: if you need to work with SQLite, you can continue using the default database.

To make use of PostgreSQL, we need to install a Python-PostgreSQL Database Adapter (psycopg2). This package helps Django to interact with a PostgreSQL database. You can use the below command to install the psycopg2 package. Make sure the PostgreSQL bin folder is included in the PATH environmental variables, and the virtual environment is activated before executing the command.

pip install psycopg2

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