学生管理系统代码提交

model/classes.py

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+# model/classes.py
+# 班级表：对应建表语句中的 c_lass（补充 class_name 字段，便于展示与统计）
+from sqlalchemy import Column, Integer, String, Date
+from sqlalchemy.orm import relationship
+
+from database import Base
+
+
+class Classinfo(Base):
+    __tablename__ = "c_lass"
+
+    class_id = Column(Integer, primary_key=True, autoincrement=True)
+    class_name = Column(String(50), nullable=False, comment="班级名称，如 Java2301")
+    start_time = Column(Date, nullable=False, comment="开课时间")
+    is_deleted = Column(Integer, default=0, nullable=False, comment="逻辑删除: 0正常 1删除")
+
+    # 反向关联
+    teachers = relationship("Teacher", back_populates="classes")
+    students = relationship("Student", back_populates="classes")
+
+    def __repr__(self):
+        return f"<Classinfo(class_id={self.class_id}, class_name='{self.class_name}')>"