Serialization in NestJS: A different approach

Serialization in applications is crucial for preparing objects containing sensitive or unnecessary information to be sent over networks, with NestJS offering a basic solution through decorators and the class-transformer library. However, this approach lacks flexibility for complex cases, such as handling multiple user objects with additional data like pagination info. To address these limitations, a custom serialization mechanism can be implemented using NestJS's ecosystem. This involves creating a base serializer class with reusable methods for serializing single entities or collections and an interceptor to handle serialization based on user roles. This approach allows for asynchronous and nested serialization, enhancing flexibility and control over the process. The custom mechanism ensures that sensitive information like passwords is excluded and enables the serialization of nested properties, making it adaptable to various projects while maintaining a clean and reusable code structure.