models.py

from exts import db
from datetime import datetime


class UserModel(db.Model):
    __tablename__ = 'user'
    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
    username = db.Column(db.String(100), nullable=False)
    password = db.Column(db.String(200), nullable=False)
    email = db.Column(db.String(100), nullable=False, unique=True)
    join_time = db.Column(db.DateTime, default=datetime.now)


class QuestionModel(db.Model):
    __tablename__ = 'question'
    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
    title = db.Column(db.String(100), nullable=False)
    content = db.Column(db.Text, nullable=False)
    create_time = db.Column(db.DateTime, default=datetime.now)

    # 外键
    author_id = db.Column(db.Integer, db.ForeignKey("user.id"))
    author = db.relationship(UserModel, backref='questions')


class AnswerModel(db.Model):
    __tablename__ = 'answer'
    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
    content = db.Column(db.Text, nullable=False)
    create_time = db.Column(db.DateTime, default=datetime.now)

    # 外键+关系
    question_id = db.Column(db.Integer, db.ForeignKey("question.id"))
    question = db.relationship(QuestionModel, backref=db.backref('answers', order_by=create_time.desc()))

    author_id = db.Column(db.Integer, db.ForeignKey("user.id"))
    author = db.relationship(UserModel, backref='answers')