models.py

import database
from sqlalchemy import Boolean, Column, ForeignKey, Integer, String
from sqlalchemy.orm import relationship


class Blog(database.Base):
    __tablename__ = "blogs"
    id = Column(Integer, primary_key=True, index=True)
    title = Column(String)
    body = Column(String)
    user_id = Column(Integer, ForeignKey('users.id'))
    creator = relationship("User", back_populates="blogs")


class User(database.Base):
    __tablename__ = "users"
    id = Column(Integer, primary_key=True, index=True)
    username = Column(String)
    email = Column(String)
    password = Column(String)

    blogs = relationship('Blog', back_populates="creator")