models.py

# models.py
from sqlalchemy import ForeignKey, Column, Integer, String
from sqlalchemy.orm import relationship
from sqlalchemy.ext.declarative import declarative_base

Base = declarative_base()

class Freebie(Base):
    __tablename__ = 'freebies'

    id = Column(Integer(), primary_key=True)
    item_name = Column(String())
    value = Column(Integer())

    dev_id = Column(Integer, ForeignKey('devs.id'))
    company_id = Column(Integer, ForeignKey('companies.id'))

    dev = relationship('Dev', back_populates='freebies')
    company = relationship('Company', back_populates='freebies')

    def print_details(self):
        return f'{self.dev.name} owns a {self.item_name} from {self.company.name}'


class Company(Base):
    __tablename__ = 'companies'

    id = Column(Integer(), primary_key=True)
    name = Column(String())
    founding_year = Column(Integer())

    freebies = relationship('Freebie', back_populates='company')
    devs = relationship('Dev', secondary='freebies', back_populates='companies', overlaps="devs")

    def give_freebie(self, dev, item_name, value):
        new_freebie = Freebie(dev=dev, company=self, item_name=item_name, value=value)
        return new_freebie

    @classmethod
    def oldest_company(cls, session):
        oldest = session.query(cls).order_by(cls.founding_year).first()
        return oldest


class Dev(Base):
    __tablename__ = 'devs'

    id = Column(Integer(), primary_key=True)
    name= Column(String())

    freebies = relationship('Freebie', back_populates='dev')
    companies = relationship('Company', secondary='freebies', back_populates='devs', overlaps="devs")

    def received_one(self, item_name):
        return any(freebie.item_name == item_name for freebie in self.freebies)

    def give_away(self, dev, freebie):
        if freebie.dev == self:
            freebie.dev = dev