合并统计，学生，老师，成绩，班级模块，还差顾问，就业

model/wl_class_model.py

@@ -1,4 +1,6 @@
 from sqlalchemy import Column, Integer, Date, String
+from sqlalchemy.orm import relationship
+
 from database import Base
 
 class Class_(Base):
@@ -6,5 +8,7 @@ class Class_(Base):
 
     class_id = Column(Integer, primary_key=True, autoincrement=True, comment="班级编号")
     start_time = Column(Date, comment="开课时间")
+
+    students=relationship("Student", back_populates="class_")
     # 逻辑删除标记（0代表正常，1代表已删除）
     is_deleted = Column(Integer, default=0, comment="逻辑删除标记")

model/wl_emp_model.py

@@ -1,18 +1,20 @@
 from sqlalchemy import *
 from sqlalchemy.orm import *
 
+from database import Base
+
 
 class Emp(Base):
     __tablename__ = "wl_emp"
 
-    stu_id = Column(Integer, primary_key=True, autoincrement=True)
-
+    stu_id = Column(Integer,ForeignKey('wl_student.stu_id'), primary_key=True, autoincrement=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 = relationship("wl_student", back_populates="wl_emp")
+    # 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

model/wl_score_model.py

@@ -1,11 +1,15 @@
-from sqlalchemy import Column, Integer, Float
+from sqlalchemy import Column, Integer, Float, ForeignKey
+from sqlalchemy.orm import relationship
+
 from database import Base
 
 class Score(Base):
     __tablename__ = "wl_score"
 
-    stu_id = Column(Integer, primary_key=True, comment="学生编号")
+    stu_id = Column(Integer, ForeignKey('wl_student.stu_id'),primary_key=True, comment="学生编号")
     exam_order = Column(Integer, primary_key=True, comment="考核序次")
     score = Column(Float, nullable=False, comment="成绩")
 
+    student=relationship("Student",back_populates="scores")
+
 

model/wl_student_model.py

@@ -22,7 +22,9 @@ class Student(Base):
     stu_age = Column(Integer, nullable=True, comment='年龄')
     stu_gender = Column(String(8), nullable=True, comment='性别')
 
-    # class_ = relationship("Class", back_populates="students")
+    class_ = relationship("Class_", back_populates="students")
+    scores=relationship("Score",back_populates="student")
+    emp=relationship("Emp",back_populates="student")
     # advisor = relationship("Advisor", back_populates="students")
 
     is_deleted = Column(Integer, default=0, comment='逻辑删除: 0正常 1删除')