Building the repository and service layers

The two most popular domain modeling patterns that are crucial in building the layers of this approach are the repository and service layer patterns. The repository aims to create strategies for managing data access. Some repository layers only provide data connectivity to the data store like in our specimen here, but oftentimes, repository's goal is to interact with the Object Relational Model (ORM) framework to optimize and manage data transactions. But aside from the access, this layer provides a high-level abstraction for the application so that the specific database technology or dialect used will not matter to the applications. It serves as an adapter to any database platform to pursue data transactions for the application, nothing else. The following is a repository class of the faculty module, which manages the domain for creating assignments for their students:

from fastapi.encoders import jsonable_encoder
from typing import...