Services in NestJS

Providers are a critical concept in NestJS, responsible for defining and injecting dependencies throughout an application. Services are a specific type of provider that handles the business logic of an application. Using services promotes modularity and reusability, making the codebase easy to maintain, test, and scale. Additionally, services can be injected as dependencies wherever needed, making sharing functionality between different parts of the codebase easy.

Creating a service

Now, in our school management system, we need a way to control the list of students. To achieve this, let’s create a StudentsService to encapsulate the business logic of managing students.

Here’s how we can create a StudentsService: