class Answer(db.Model):
id = db.Column(db.Integer, primary_key=True)
question_id = db.Column(db.Integer, db.ForeignKey('question.id', ondelete='CASCADE'))
question = db.relationship('Question', backref=db.backref('answer_set'))
content = db.Column(db.Text(), nullable=False)
create_date = db.Column(db.DateTime(), nullable=False)
user_id = db.Column(db.Integer, db.ForeignKey('user.id', ondelete='CASCADE'), nullable=False)
user = db.relationship('User', backref=db.backref('answer_set'))
class Answer(db.Model):
id = db.Column(db.Integer, primary_key=True)
# ForeignKey(외래값)는 다른 데이터테이블의 primary_key(고유값)를 사용하는 것
# ondelete='CASCADE'는 answer에서 삭제되었을때 question에서도 삭제하는 것
question_id = db.Column(db.Integer, db.ForeignKey('question.id', ondelete='CASCADE'))
question = db.relationship('Question', backref=db.backref('answer_set'))
content = db.Column(db.Text(), nullable=False)
create_date = db.Column(db.DateTime(), nullable=False)
# 컬럼 추가
user_id = db.Column(db.Integer, db.ForeignKey('user.id', ondelete='CASCADE'), nullable=False)
user = db.relationship('User', backref=db.backref('answer_set'))
modify_date = db.Column(db.DateTime(), nullable=True)
class Question(db.Model):
id = db.Column(db.Integer, primary_key=True)
subject = db.Column(db.String(200), nullable=False)
content = db.Column(db.Text(), nullable=False)
create_date = db.Column(db.DateTime(), nullable=False)
user_id = db.Column(db.Integer, db.ForeignKey('user.id', ondelete='CASCADE'), nullable=False)
user = db.relationship('User', backref=db.backref('question_set'))
class Answer(db.Model):
id = db.Column(db.Integer, primary_key=True)
# Question 모델의 primary key / 질문 삭제시 함께 삭제
question_id = db.Column(db.Integer,
db.ForeignKey('question.id', ondelete='CASCADE'))
# 답변 모델에서 질문 모델 참조 / 역참조 설정, 질문 삭제시 함께 삭제
question = db.relationship('Question',
backref=db.backref(
'answer_set', cascade='all, delete-orphan'))
content = db.Column(db.Text(), nullable=False)
create_date = db.Column(db.DateTime(), nullable=False)