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55 lines
1.8 KiB
55 lines
1.8 KiB
from typing import List, Optional
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from src.dal.abstract_dal import IStudentDAL
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from src.models.student import Student
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from src.bll.validators import validate_student
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class StudentService:
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def __init__(self, dal: IStudentDAL):
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self.dal = dal
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def add_student(self, student: Student) -> tuple[bool, str]:
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"""添加学生信息，返回是否成功和错误信息"""
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is_valid, msg = validate_student(student)
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if not is_valid:
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return False, msg
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if self.dal.get_by_id(student.id_card):
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return False, "身份证号已存在"
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if self.dal.get_by_stu_id(student.stu_id):
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return False, "学号已存在"
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if self.dal.add_student(student):
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return True, "添加成功"
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return False, "添加失败"
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def delete_student(self, id_card: str) -> tuple[bool, str]:
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"""删除学生信息"""
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if not self.dal.get_by_id(id_card):
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return False, "学生不存在"
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if self.dal.delete_student(id_card):
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return True, "删除成功"
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return False, "删除失败"
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def update_student(self, student: Student) -> tuple[bool, str]:
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"""更新学生信息"""
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is_valid, msg = validate_student(student)
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if not is_valid:
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return False, msg
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existing = self.dal.get_by_id(student.id_card)
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if not existing:
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return False, "学生不存在"
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# 检查学号是否被其他学生使用
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stu_with_same_id = self.dal.get_by_stu_id(student.stu_id)
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if stu_with_same_id and stu_with_same_id.id_card != student.id_card:
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return False, "学号已被其他学生使用"
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if self.dal.update_student(student):
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return True, "更新成功"
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return False, "更新失败"
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# 其他业务方法... |