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from typing_extensions import Self, Optional
from pydantic import model_validator
from sqlmodel import Field, Relationship
from .person import Person
from utils.enums.department import Department
class Instructor(Person, table=True):
"""
Represents an Instructor, inheriting from Person, with an additional department field.
Attributes:
department (str): The instructor's department.
Methods:
set_id() -> Self: An SQLmodel validator that automatically sets the instructor's ID with a "INS" prefix through handle_id method in the Person class.
"""
department: str = Field(default=Department.COMPUTER_SCIENCE)
course_id: Optional[str] = Field(
default=None, foreign_key="course.id")
course: Optional["Course"] = Relationship(
back_populates="instructors")
@model_validator(mode='after')
def set_id(self) -> Self:
self.handle_id(prefix="INS")
return self
def __str__(self) -> str:
"""
Returns a string representation of the instructor.
Returns:
str: A description of the instructor including their name, ID number, and department.
"""
return f"Instructor(name: {self.name}, id: {self.id}, department: {self.department})"
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