from app.extensions import db from sqlalchemy.orm import relationship, mapped_column class Adoptions(db.Model) : id = mapped_column(db.Integer, primary_key=True) adopter_id = mapped_column(db.Integer, db.ForeignKey('user.id'), nullable=False) pet_id = mapped_column(db.Integer, db.ForeignKey('pet.id'), nullable=False) status_id = mapped_column(db.Integer, db.ForeignKey('adoption_status.id'), nullable=False) adopter = relationship("User") status = relationship("AdoptionStatus", uselist=False)