catalogdb_setup.py

import os
import sys
from sqlalchemy import Column, ForeignKey, Integer, String
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import relationship
from sqlalchemy import create_engine

# factory function, that returns a base class
Base = declarative_base()


# Creates table for logged-in Users
class User(Base):
    __tablename__ = 'user'

    id = Column(Integer, primary_key=True)
    name = Column(String(250), nullable=False)
    email = Column(String(250), nullable=False)
    picture = Column(String(250))


# Creates table for Categories
class Category(Base):
    __tablename__ = 'category'

    id = Column(Integer, primary_key=True)
    title = Column(String(250), nullable=False)
    items = relationship("CategoryItem")
    user_id = Column(Integer, ForeignKey('user.id'))
    user = relationship(User)

    @property
    def serialize(self):
        """Return object data in easily serializeable format"""
        return {
            'category_id': self.id,
            'category_name': self.title,
            'items': [item.serialize for item in self.items],
        }


# Creates table for specific category items
class CategoryItem(Base):
    __tablename__ = 'category_item'

    title = Column(String(80), nullable=False)
    id = Column(Integer, primary_key=True)
    description = Column(String(250))
    category_id = Column(Integer, ForeignKey('category.id'))
    category = relationship(Category, back_populates='items')
    user_id = Column(Integer, ForeignKey('user.id'))
    user = relationship(User)

    @property
    def serialize(self):
        """Return object data in easily serializeable format"""
        return {
            'title': self.title,
            'id': self.id,
            'description': self.description,
        }

engine = create_engine('sqlite:///catalog.db')

Base.metadata.create_all(engine)