第一次提交

model/classes_model.py

@@ -0,0 +1,25 @@
+from sqlalchemy import Column, Integer, String, Boolean, Date, Table, ForeignKey
+from sqlalchemy.orm import relationship
+from database import Base
+
+
+
+teacher_classes = Table(
+    'teacher_classes',
+    Base.metadata,
+    Column('teacher_id', ForeignKey('teacher.t_id'), primary_key=True),
+    Column('class_id', ForeignKey('classes.class_id'), primary_key=True)
+)
+
+class Classes(Base):
+    __tablename__ = 'classes'
+    class_id = Column(Integer, primary_key=True,autoincrement=True)
+    head_teacher_id = Column(Integer, ForeignKey('teacher.t_id'), nullable=False)
+    create_time = Column(Date,nullable=False)
+    class_name = Column(String(50), nullable=False, unique=True)
+    class_delete = Column(Boolean, default=False)
+    counselor_id = Column(Integer, ForeignKey('counselor.id'))
+
+    students = relationship('Student', back_populates='classes')
+    teachers = relationship("Teacher", secondary=teacher_classes, back_populates="classes")
+    counselor = relationship("Counselor", back_populates="classes")