diff --git a/Pipfile b/Pipfile index 63c79cd98..5bda56b8b 100644 --- a/Pipfile +++ b/Pipfile @@ -8,7 +8,7 @@ alembic = "1.8.1" importlib-metadata = "6.0.0" importlib-resources = "5.10.0" ipdb = "0.13.9" -sqlalchemy = "1.4.42" +sqlalchemy = "*" [dev-packages] diff --git a/Pipfile.lock b/Pipfile.lock index 3923f4a97..f9e1c0743 100644 --- a/Pipfile.lock +++ b/Pipfile.lock @@ -1,7 +1,7 @@ { "_meta": { "hash": { - "sha256": "fa62c636b7ae5acb4993fc7b007a651c55b562aa29962a9a8585ec314b352ae6" + "sha256": "7fa3316bc11173caf22a4489dce1c5b998e8410b8a3a2cffd1d3590de64e857f" }, "pipfile-spec": 6, "requires": { @@ -61,6 +61,85 @@ ], "version": "==1.2.0" }, + "greenlet": { + "hashes": [ + "sha256:0153404a4bb921f0ff1abeb5ce8a5131da56b953eda6e14b88dc6bbc04d2049e", + "sha256:03a088b9de532cbfe2ba2034b2b85e82df37874681e8c470d6fb2f8c04d7e4b7", + "sha256:04b013dc07c96f83134b1e99888e7a79979f1a247e2a9f59697fa14b5862ed01", + "sha256:05175c27cb459dcfc05d026c4232f9de8913ed006d42713cb8a5137bd49375f1", + 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index 4f922eb69..51b647c8f 100644 --- a/lib/debug.py +++ b/lib/debug.py @@ -1,9 +1,57 @@ #!/usr/bin/env python3 -from sqlalchemy import create_engine +from models import Company, Dev, Freebie, session -from models import Company, Dev +def fetch_dev_by_name(name): + + dev = session.query(Dev).filter_by(name=name).first() + if dev is None: + print(f"No developer found with the name: {name}") + return dev -if __name__ == '__main__': - engine = create_engine('sqlite:///freebies.db') + +def fetch_freebie(): + + freebie = session.query(Freebie).first() + if freebie is None: + print("No freebies found in the database.") + return freebie + + +def fetch_oldest_company(): + + oldest_company = Company.oldest_company() + if oldest_company is None: + print("No companies found in the database.") + return oldest_company + + +def main(): + + # interactive debugger session import ipdb; ipdb.set_trace() + + # Fetching Developer (Alice) + dev = fetch_dev_by_name('Alice') + if dev: + print(f"Developer: {dev.name}") + print("Freebies associated with Alice:") + for freebie in dev.freebies: + print(freebie.print_details()) + + # Fetching Freebie and print its details + freebie = fetch_freebie() + if freebie: + print(f"Freebie details: {freebie.print_details()}") + + # Finding the oldest company and print its details + oldest_company = fetch_oldest_company() + if oldest_company: + print(f"Oldest company: {oldest_company.name}, Founded in {oldest_company.founding_year}") + + # Closes the session after all operations + session.close() + + +if __name__ == "__main__": + main() diff --git a/lib/freebies.db b/lib/freebies.db index 12beb1c96..3e02b1430 100644 Binary files a/lib/freebies.db and b/lib/freebies.db differ diff --git a/lib/models.py b/lib/models.py index 2681bee5a..bd0be9a3b 100644 --- a/lib/models.py +++ b/lib/models.py @@ -1,29 +1,113 @@ from sqlalchemy import ForeignKey, Column, Integer, String, MetaData -from sqlalchemy.orm import relationship, backref +from sqlalchemy.orm import relationship, sessionmaker from sqlalchemy.ext.declarative import declarative_base +from sqlalchemy import create_engine +# Name convention for foreign keys convention = { "fk": "fk_%(table_name)s_%(column_0_name)s_%(referred_table_name)s", } metadata = MetaData(naming_convention=convention) +# Basing class for declarative models Base = declarative_base(metadata=metadata) +# Database URL and session setup +DATABASE_URL = 'sqlite:///freebies.db' # SQLite database URL +engine = create_engine(DATABASE_URL, echo=True) # echo=True to log SQL queries +Session = sessionmaker(bind=engine) +session = Session() + + +# Company Model class Company(Base): __tablename__ = 'companies' id = Column(Integer(), primary_key=True) - name = Column(String()) - founding_year = Column(Integer()) + name = Column(String(), nullable=False) + founding_year = Column(Integer(), nullable=False) + + # Relationships + freebies = relationship('Freebie', backref='company', cascade="all, delete-orphan") + devs = relationship('Dev', secondary='dev_freebies', backref='companies') def __repr__(self): + return f'' + @classmethod + def oldest_company(cls): + + return session.query(cls).order_by(cls.founding_year).first() + + def give_freebie(self, dev, item_name, value): + + freebie = Freebie(dev_id=dev.id, company_id=self.id, item_name=item_name, value=value) + session.add(freebie) + session.commit() + + +# Dev Model class Dev(Base): __tablename__ = 'devs' id = Column(Integer(), primary_key=True) - name= Column(String()) + name = Column(String(), nullable=False) + + # Relationships + freebies = relationship('Freebie', backref='dev', cascade="all, delete-orphan") def __repr__(self): + return f'' + + 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_id == self.id: + freebie.dev_id = dev.id + session.commit() + + +# Freebie Model +class Freebie(Base): + __tablename__ = 'freebies' + + id = Column(Integer(), primary_key=True) + item_name = Column(String(), nullable=False) + value = Column(Integer(), nullable=False) + dev_id = Column(Integer(), ForeignKey('devs.id'), nullable=False) + company_id = Column(Integer(), ForeignKey('companies.id'), nullable=False) + + def __repr__(self): + + return f'' + + def print_details(self): + + return f"{self.dev.name} owns a {self.item_name} from {self.company.name}" + + +# Association Table for Many-to-Many Relationship (Dev <-> Company) +class DevFreebies(Base): + __tablename__ = 'dev_freebies' + + dev_id = Column(Integer(), ForeignKey('devs.id'), primary_key=True) + company_id = Column(Integer(), ForeignKey('companies.id'), primary_key=True) + + # Relationships (optional, if you want to access directly) + dev = relationship('Dev', backref='dev_freebies') + company = relationship('Company', backref='dev_freebies') + + +# Initialize the database (create tables) +def initialize_db(): + + Base.metadata.create_all(engine) + + +if __name__ == "__main__": + initialize_db() diff --git a/lib/seed.py b/lib/seed.py index b16becbbb..b607f4377 100644 --- a/lib/seed.py +++ b/lib/seed.py @@ -1,3 +1,61 @@ -#!/usr/bin/env python3 +from models import Company, Dev, Freebie, session, initialize_db -# Script goes here! +def create_companies(): + + companies = [ + Company(name="TechCorp", founding_year=1999), + Company(name="DevGoods", founding_year=2005), + Company(name="WebSolutions", founding_year=2010) + ] + return companies + + +def create_devs(): + + devs = [ + Dev(name="Alice"), + Dev(name="Bob"), + Dev(name="Charlie") + ] + return devs + + +def seed_freebies(companies, devs): + + # Company1 gives freebies to Alice and Bob + companies[0].give_freebie(devs[0], "T-Shirt", 10) + companies[0].give_freebie(devs[1], "Mug", 5) + + # Company2 gives freebies to Alice and Charlie + companies[1].give_freebie(devs[0], "Laptop Bag", 25) + companies[1].give_freebie(devs[2], "T-Shirt", 10) + + # Company3 gives freebies to Bob and Charlie + companies[2].give_freebie(devs[1], "Notebook", 15) + companies[2].give_freebie(devs[2], "Laptop", 100) + + +def seed(): + + # Initializing database (create tables if they don't exist already) + initialize_db() + + # Creating and add companies and developers + companies = create_companies() + devs = create_devs() + + # Adding companies and devs to session + session.add_all(companies + devs) + session.commit() + + # Assigning freebies + seed_freebies(companies, devs) + + # Commiting session to save changes to the database + session.commit() + + print("Database seeded successfully!") + + +if __name__ == "__main__": + seed() diff --git a/lib/your_database.db b/lib/your_database.db new file mode 100644 index 000000000..e69de29bb