models.py

from flask_sqlalchemy import SQLAlchemy
db = SQLAlchemy()

class User(db.Model):
    __tablename__ = 'users'
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(120), nullable=False)
    lastname = db.Column(db.String(120), nullable=False)
    email = db.Column(db.String(100))
    password = db.Column(db.String(100), nullable=False)

    def serialize(self):
        return {
            "id": self.id,
            "name": self.name,
            "lastname": self.lastname,
            "email": self.email,
            "password": self.password
        }

    def save(self):
        db.session.add(self)
        db.session.commit()

    def update(self):
        db.session.commit()

    def delete(self):
        db.session.delete(self)
        db.session.commit()

class Character(db.Model):
    __tablename__ = 'characters'
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(200), nullable=False)
    age = db.Column(db.Integer, nullable=False)

    def serialize(self):
        return {
            'id': self.id,
            'name': self.name,
            'age': self.age
        }

    def save(self):
        db.session.add(self)
        db.session.commit()

    def update(self):
        db.session.commit()

    def delete(self):
        db.session.delete(self)
        db.session.commit()

class Planet(db.Model):
    __tablename__ = 'planets'
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(200), nullable=False)
    climate = db.Column(db.String(200), nullable=False)
    terrain = db.Column(db.String(200), nullable=False)

    def serialize(self):
        return {
            'id': self.id,
            'name': self.name,
            'climate': self.climate,
            'terrain': self.terrain
        }

    def save(self):
        db.session.add(self)
        db.session.commit()

    def update(self):
        db.session.commit()

    def delete(self):
        db.session.delete(self)
        db.session.commit()

class Favorite(db.Model):
    __tablename__ = 'favorites'
    id = db.Column(db.Integer, primary_key=True)
    user_id = db.Column(db.Integer, db.ForeignKey('users.id'))
    character_id = db.Column(db.Integer, db.ForeignKey('characters.id'))
    planet_id = db.Column(db.Integer, db.ForeignKey('planets.id'))

    def serialize(self):
        return {
            'id': self.id,
            'user_id': self.user_id,
            'character_id': self.character_id,
            'planet_id': self.planet_id
        }

    def save(self):
        db.session.add(self)
        db.session.commit()

    def update(self):
        db.session.commit()

    def delete(self):
        db.session.delete(self)
        db.session.commit()