Why need serializer and how is it work?

A serializer is a mechanism that allows you to convert complex data types, such as objects or data structures, into a format that can be easily transmitted and stored, such as JSON or XML. Serializers are commonly used in web applications to send data over the network, such as between a client and a server, or to store data in a database.

Serializers are particularly useful in web development when building APIs (Application Programming Interfaces), which are used to communicate data between different software applications. APIs typically rely on a standard data format, such as JSON, so that different applications can easily communicate with each other.

In addition to converting data into a standard format, serializers can also perform data validation, ensure data integrity, and provide security features such as authentication and access control.

In terms of how serializers work, they typically involve defining a mapping between a data model and a serialized format. For example, in Python’s Django web framework, you can define a serializer class that specifies the fields of a model and how they should be serialized into a JSON format. When the serializer is called, it will take the data from the model and serialize it according to the rules defined in the serializer class.

Overall, serializers are an essential tool for any developer building web applications, particularly those working with APIs. They allow complex data to be easily transmitted and stored, while also providing important data validation and security features.