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")