import datetime from sqlalchemy import Boolean, Column, Integer, String, ForeignKey, DateTime from sqlalchemy.orm import relationship, backref from db.base_class import Base class KanBan(Base): id = Column(Integer, primary_key=True, index=True) project_id = Column(Integer, ForeignKey('project.id')) user_id = Column(Integer, ForeignKey('user.id')) create_date = Column(DateTime, default=datetime.datetime.now()) project = relationship('Project', backref='kanban') # folder = relationship('Folder', backref=backref("kanban", lazy="joined"))