上传文件至「/」

classinfo.py

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+from sqlalchemy import  Column, Integer, String, Date
+from sqlalchemy.orm import relationship
+from database import Base
+from model.teacher_class import teacher_class
+
+
+# 班级信息表
+class ClassInfo(Base):
+    __tablename__="classinfo"
+    id=Column(Integer,primary_key=True,autoincrement=True)
+    class_name=Column(String(50),nullable=False,unique=True)
+    start_time=Column(Date)
+    statu=Column(Integer,default=1)  # 逻辑删除表字段 1代表存在
+    teachers=relationship("Teacher",secondary=teacher_class,back_populates="classinfo")
+    students= relationship("Student",back_populates="classinfo")