From a21ca1c91b2b2870640d37b8c8274d35d8b32261 Mon Sep 17 00:00:00 2001 From: Neville Muli Date: Thu, 29 May 2025 19:59:23 +0300 Subject: [PATCH 1/2] . --- lib/models.py | 64 +++++++++++++++++++++++++++++++++++++++++++++++---- lib/seed.py | 16 +++++++++++-- 2 files changed, 74 insertions(+), 6 deletions(-) diff --git a/lib/models.py b/lib/models.py index 2681bee5a..05aa985bc 100644 --- a/lib/models.py +++ b/lib/models.py @@ -15,9 +15,34 @@ class Company(Base): id = Column(Integer(), primary_key=True) name = Column(String()) founding_year = Column(Integer()) + + freebies = relationship("Freebie", back_populates="company") + + @property + def devs(self): + """All devs who received freebies from this company""" + return [freebie.dev for freebie in self.freebies] + + def give_freebie(self, dev, item_name, value): + """Create a new freebie association (caller handles session)""" + return Freebie( + item_name=item_name, + value=value, + dev=dev, + company=self + ) + + @classmethod + def oldest_company(cls, session): + """Class method to find oldest company (requires session parameter)""" + return session.query(cls).order_by(cls.founding_year).first() + + @classmethod + def oldest_company(cls, session): + """Class method to find oldest company (requires session parameter)""" + return session.query(cls).order_by(cls.founding_year).first() + - def __repr__(self): - return f'' class Dev(Base): __tablename__ = 'devs' @@ -25,5 +50,36 @@ class Dev(Base): id = Column(Integer(), primary_key=True) name= Column(String()) - def __repr__(self): - return f'' + freebies = relationship("Freebie", back_populates="dev") + + @property + def companies(self): + """All companies where dev received freebies""" + return [freebie.company for freebie in self.freebies] + + def received_one(self, item_name): + """Check if dev has any freebie with given item name""" + return any(f.item_name == item_name for f in self.freebies) + + def give_away(self, other_dev, freebie): + """Transfer freebie to another dev if it belongs to current dev""" + if freebie.dev == self: + freebie.dev = other_dev + return True + return False + +class Freebie(Base): + __tablename__ = 'freebies' + + id = Column(Integer, primary_key=True) + item_name = Column(String) + value = Column(Integer) + company_id = Column(Integer, ForeignKey('companies.id')) + dev_id = Column(Integer, ForeignKey('devs.id')) + + dev = relationship("Dev", back_populates="freebies") + company = relationship("Company", back_populates="freebies") + + def print_details(self): + """Format freebie details as string""" + return f"{self.dev.name} owns a {self.item_name} from {self.company.name}" diff --git a/lib/seed.py b/lib/seed.py index b16becbbb..ce83a91da 100644 --- a/lib/seed.py +++ b/lib/seed.py @@ -1,3 +1,15 @@ -#!/usr/bin/env python3 +from alembic import op +import sqlalchemy as sa -# Script goes here! +def upgrade(): + op.create_table('freebies', + sa.Column('id', sa.Integer(), nullable=False), + sa.Column('item_name', sa.String(), nullable=True), + sa.Column('value', sa.Integer(), nullable=True), + sa.Column('dev_id', sa.Integer(), sa.ForeignKey('devs.id')), + sa.Column('company_id', sa.Integer(), sa.ForeignKey('companies.id')), + sa.PrimaryKeyConstraint('id') + ) + +def downgrade(): + op.drop_table('freebies') From 393fb3a52b55d9e70f1c26525b00fa149f425e27 Mon Sep 17 00:00:00 2001 From: Neville Muli Date: Thu, 29 May 2025 20:06:05 +0300 Subject: [PATCH 2/2] finishes code challenge --- lib/freebies.db | Bin 20480 -> 24576 bytes .../versions/64272f0f8ecd_adds_freebies.py | 37 ++++++++++++++ lib/seed.py | 45 ++++++++++++------ 3 files changed, 67 insertions(+), 15 deletions(-) create mode 100644 lib/migrations/versions/64272f0f8ecd_adds_freebies.py diff --git a/lib/freebies.db b/lib/freebies.db index 12beb1c963e832db481e7a7493e3029e691ac4dc..bcd27ee2f436398b4f71bdeebbf9c58c16a32bc7 100644 GIT binary patch delta 547 zcmZozz}Rqrae}lU2Ll5G8xX?)%S0VxaSjH(vQA$99}KKKyBPR+`FHZw^GWgS+SusA zW6~7M$}TP|%h<|Wl9-f}npTvWnv|JZ45QhcgIpa$TopnboqSvsprVr<`DC0jOHy;= z^AdAY6~Y{YoIMvdsLYY8!DY*Fuxq7<$DR{d^Y9JJ7Dg?Q@xdyrVIlBfc zK!ibxH8N8)@mK(KhB43`@jx2YV2Jxr3^!! zFZ>e70=&TRXX1at!2gN=$!0-;8~hqPOe_qNOpdvURrz`Br+64aJoo(k^qf@oa}d?< z82G>OzuPQm@Q7c5jft5-*eO4WgOQm*+%YFJITfUang22a|404@{Fi}d9_82NW@cj$ sX5?h_Elp=-;%8!GkY;4$4ACvl$Sf-1V&Y{43UG3A2A5Wae}lUD+2=q2*UvLL>*&MRtCLzSzi7h3@m(74E((OJNfGQq&5o*EaTlQ r#dk}P$285{DB08^Db2(pd6U8yej#K5UXW1&K-Ks8Cr*%NL*)VhkJ1_o diff --git a/lib/migrations/versions/64272f0f8ecd_adds_freebies.py b/lib/migrations/versions/64272f0f8ecd_adds_freebies.py new file mode 100644 index 000000000..e83c7fe4b --- /dev/null +++ b/lib/migrations/versions/64272f0f8ecd_adds_freebies.py @@ -0,0 +1,37 @@ +"""adds freebies + +Revision ID: 64272f0f8ecd +Revises: 5f72c58bf48c +Create Date: 2025-05-29 20:05:23.481500 + +""" +from alembic import op +import sqlalchemy as sa + + +# revision identifiers, used by Alembic. +revision = '64272f0f8ecd' +down_revision = '5f72c58bf48c' +branch_labels = None +depends_on = None + + +def upgrade() -> None: + # ### commands auto generated by Alembic - please adjust! ### + op.create_table('freebies', + sa.Column('id', sa.Integer(), nullable=False), + sa.Column('item_name', sa.String(), nullable=True), + sa.Column('value', sa.Integer(), nullable=True), + sa.Column('company_id', sa.Integer(), nullable=True), + sa.Column('dev_id', sa.Integer(), nullable=True), + sa.ForeignKeyConstraint(['company_id'], ['companies.id'], name=op.f('fk_freebies_company_id_companies')), + sa.ForeignKeyConstraint(['dev_id'], ['devs.id'], name=op.f('fk_freebies_dev_id_devs')), + sa.PrimaryKeyConstraint('id') + ) + # ### end Alembic commands ### + + +def downgrade() -> None: + # ### commands auto generated by Alembic - please adjust! ### + op.drop_table('freebies') + # ### end Alembic commands ### diff --git a/lib/seed.py b/lib/seed.py index ce83a91da..543001dbd 100644 --- a/lib/seed.py +++ b/lib/seed.py @@ -1,15 +1,30 @@ -from alembic import op -import sqlalchemy as sa - -def upgrade(): - op.create_table('freebies', - sa.Column('id', sa.Integer(), nullable=False), - sa.Column('item_name', sa.String(), nullable=True), - sa.Column('value', sa.Integer(), nullable=True), - sa.Column('dev_id', sa.Integer(), sa.ForeignKey('devs.id')), - sa.Column('company_id', sa.Integer(), sa.ForeignKey('companies.id')), - sa.PrimaryKeyConstraint('id') - ) - -def downgrade(): - op.drop_table('freebies') +from sqlalchemy import create_engine +from sqlalchemy.orm import sessionmaker +from models import Base, Company, Dev, Freebie + + +engine = create_engine('sqlite:///freebies.db') +Session = sessionmaker(bind=engine) +session = Session() +Base.metadata.create_all(engine) + + +companies = [ + Company(name="Google", founding_year=1998), + Company(name="Amazon", founding_year=1994) +] + +devs = [ + Dev(name="Alice"), + Dev(name="Bob") +] + +freebies = [ + Freebie(item_name="Sticker", value=1, dev=devs[0], company=companies[0]), + Freebie(item_name="T-shirt", value=10, dev=devs[0], company=companies[1]), + Freebie(item_name="Mug", value=5, dev=devs[1], company=companies[0]) +] + + +session.add_all(companies + devs + freebies) +session.commit() \ No newline at end of file