aaa

student_system_final/model/classes.py

@@ -0,0 +1,15 @@
+from sqlalchemy import Column, Integer, String, DateTime, Float, Date
+from sqlalchemy.orm import relationship
+from database import Base
+from model.teacher import class_teacher
+
+
+class Class(Base):
+    __tablename__ = "student_class"
+    cid = Column(Integer, primary_key=True)
+    class_name=Column(String(20),nullable=False)
+    start_time=Column(Date,nullable=False)
+    headteacher=Column(String(20),nullable=False)
+    flag=Column(Integer,nullable=False,default=1)
+    teachers=relationship("Teacher",secondary=class_teacher,back_populates="classes")
+    student = relationship("Student", back_populates="classes")