上传文件至「/」

teacher.py

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+from sqlalchemy import Column, Integer, String, ForeignKey,Date,DateTime
+from sqlalchemy.orm import relationship
+from sqlalchemy.sql import func
+from model import Base
+from model.teacher_class import teacher_class
+
+
+class Teacher(Base):
+    __tablename__="teacher"
+    id=Column(Integer,primary_key=True,autoincrement=True)
+    teacher_no=Column(String(50),unique=True,nullable=False)
+    name=Column(String(50),nullable=False)
+    phone=Column(String(50),nullable=False)
+    is_deleted=Column(Integer,default=0)
+    created_at=Column(DateTime,server_default=func.now())
+    updated_at=Column(DateTime,onupdate=func.now())
+    classinfo = relationship("ClassInfo",secondary=teacher_class, back_populates="teachers")