project/models.py

from project import db, login_manager
from datetime import datetime
from itsdangerous import URLSafeTimedSerializer
from flask_login import UserMixin
from flask import current_app

@login_manager.user_loader
def load_user(user_id):
    return db.session.get(User, int(user_id))


class User(db.Model, UserMixin):
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(20), unique=True, nullable=False)
    email = db.Column(db.String(120), unique=True, nullable=False)
    image_file = db.Column(db.String(20), nullable=False, default='ae33c584ff50ba15.png')
    password = db.Column(db.String(60), nullable=False)

    posts = db.relationship('Post', backref='author', lazy=True)

    def get_reset_token(self):
        s = URLSafeTimedSerializer(current_app.config['SECRET_KEY'])
        return s.dumps({'user_id': self.id}, salt='password-reset')

    @staticmethod
    def verify_reset_token(token, expires_sec=1800):
        s = URLSafeTimedSerializer(current_app.config['SECRET_KEY'])
        try:
            data = s.loads(
                token,
                salt='password-reset',
                max_age=expires_sec
            )
        except Exception:
            return None
        return db.session.get(User, data['user_id'])

    def __repr__(self):
        return f"User('{self.username}', '{self.email}', '{self.image_file}')"


class Post(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    title = db.Column(db.String(100), nullable=False)
    content = db.Column(db.String(500), nullable=False)
    date_posted = db.Column(db.DateTime, nullable=False, default=datetime.utcnow)
    user_id = db.Column(db.Integer, db.ForeignKey('user.id'), nullable=False)

    def __repr__(self):
        return f"Post('{self.title}', '{self.date_posted}')"