就业模块合并

model/wl_emp_model.py

@@ -1,5 +1,5 @@
-from sqlalchemy import *
-from sqlalchemy.orm import *
+from sqlalchemy import Column, DateTime, ForeignKey, Integer, String, func
+from sqlalchemy.orm import relationship
 
 from database import Base
 
@@ -7,15 +7,17 @@ from database import Base
 class Emp(Base):
     __tablename__ = "wl_emp"
 
-    stu_id = Column(Integer,ForeignKey('wl_student.stu_id'), primary_key=True, autoincrement=True)
+    # 学号做主键，同时做外键指向学生表，长度跟 Student.stu_no 保持一致
+    stu_no = Column(String(20), ForeignKey('wl_student.stu_no'), primary_key=True)
     emp_open_time = Column(DateTime, default="2026-11-30 18:18:18")
     offer_time = Column(DateTime, default=func.now())
     company_name = Column(String(100), nullable=False)
     salary = Column(Integer, nullable=False, default=15000)
 
-    # Student.emp 用的是 back_populates="student"，这个反向属性必须保留，否则 mapper 配置失败
     student = relationship("Student", back_populates="emp")
 
-    def __repr__(self):
-        pass
+    # 逻辑删除：0 正常 1 已删除
+    is_deleted = Column(Integer, default=0, comment='逻辑删除: 0正常 1删除')
 
+    def __repr__(self):
+        return f"<Emp(stu_no={self.stu_no}, company='{self.company_name}')>"