diff --git a/.gitignore b/.gitignore index 1fcadf3de..4533b4d9a 100644 --- a/.gitignore +++ b/.gitignore @@ -49,3 +49,4 @@ jspm_packages # pytest cache .pytest_cache +lib/freebies.db diff --git a/Pipfile b/Pipfile index 63c79cd98..a702bb385 100644 --- a/Pipfile +++ b/Pipfile @@ -8,7 +8,9 @@ alembic = "1.8.1" importlib-metadata = "6.0.0" importlib-resources = "5.10.0" ipdb = "0.13.9" -sqlalchemy = "1.4.42" +sqlalchemy = "*" +ipython = "*" +pytest = "*" [dev-packages] diff --git a/Pipfile.lock b/Pipfile.lock index 3923f4a97..3e195bf8c 100644 --- a/Pipfile.lock +++ b/Pipfile.lock @@ -1,7 +1,7 @@ { "_meta": { "hash": { - "sha256": "fa62c636b7ae5acb4993fc7b007a651c55b562aa29962a9a8585ec314b352ae6" + "sha256": "c2e506df89a6ecd29c2318e6c6940599f033435c223f7ccde64e54676f1ed9f2" }, "pipfile-spec": 6, "requires": { @@ -34,10 +34,11 @@ }, "asttokens": { "hashes": [ - "sha256:4622110b2a6f30b77e1473affaa97e711bc2f07d3f10848420ff1898edbe94f3", - 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+# defaults to the current working directory. +prepend_sys_path = . + +# timezone to use when rendering the date within the migration file +# as well as the filename. +# If specified, requires the python-dateutil library that can be +# installed by adding `alembic[tz]` to the pip requirements +# string value is passed to dateutil.tz.gettz() +# leave blank for localtime +# timezone = + +# max length of characters to apply to the +# "slug" field +# truncate_slug_length = 40 + +# set to 'true' to run the environment during +# the 'revision' command, regardless of autogenerate +# revision_environment = false + +# set to 'true' to allow .pyc and .pyo files without +# a source .py file to be detected as revisions in the +# versions/ directory +# sourceless = false + +# version location specification; This defaults +# to alembic/versions. When using multiple version +# directories, initial revisions must be specified with --version-path. +# The path separator used here should be the separator specified by "version_path_separator" below. +# version_locations = %(here)s/bar:%(here)s/bat:alembic/versions + +# version path separator; As mentioned above, this is the character used to split +# version_locations. The default within new alembic.ini files is "os", which uses os.pathsep. +# If this key is omitted entirely, it falls back to the legacy behavior of splitting on spaces and/or commas. +# Valid values for version_path_separator are: +# +# version_path_separator = : +# version_path_separator = ; +# version_path_separator = space +version_path_separator = os # Use os.pathsep. Default configuration used for new projects. + +# the output encoding used when revision files +# are written from script.py.mako +# output_encoding = utf-8 + +sqlalchemy.url = sqlite:///lib/freebies.db + + + +[post_write_hooks] +# post_write_hooks defines scripts or Python functions that are run +# on newly generated revision scripts. See the documentation for further +# detail and examples + +# format using "black" - use the console_scripts runner, against the "black" entrypoint +# hooks = black +# black.type = console_scripts +# black.entrypoint = black +# black.options = -l 79 REVISION_SCRIPT_FILENAME + +# Logging configuration +[loggers] +keys = root,sqlalchemy,alembic + +[handlers] +keys = console + +[formatters] +keys = generic + +[logger_root] +level = WARN +handlers = console +qualname = + +[logger_sqlalchemy] +level = WARN +handlers = +qualname = sqlalchemy.engine + +[logger_alembic] +level = INFO +handlers = +qualname = alembic + +[handler_console] +class = StreamHandler +args = (sys.stderr,) +level = NOTSET +formatter = generic + +[formatter_generic] +format = %(levelname)-5.5s [%(name)s] %(message)s +datefmt = %H:%M:%S diff --git a/alembic/README b/alembic/README new file mode 100644 index 000000000..98e4f9c44 --- /dev/null +++ b/alembic/README @@ -0,0 +1 @@ +Generic single-database configuration. \ No newline at end of file diff --git a/alembic/env.py b/alembic/env.py new file mode 100644 index 000000000..978d032be --- /dev/null +++ b/alembic/env.py @@ -0,0 +1,20 @@ +from sqlalchemy import Column, Integer, String, ForeignKey, Table +from sqlalchemy.ext.declarative import declarative_base + +Base = declarative_base() + +def upgrade(migrate_engine): + # create freebies table + freebies = Table( + 'freebies', Base.metadata, + Column('id', Integer, primary_key=True), + Column('item_name', String), + Column('value', Integer), + Column('company_id', Integer, ForeignKey('companies.id')), + Column('dev_id', Integer, ForeignKey('devs.id')), + ) + freebies.create(migrate_engine) + +def downgrade(migrate_engine): + freebies = Table('freebies', Base.metadata, autoload_with=migrate_engine) + freebies.drop(migrate_engine) diff --git a/alembic/script.py.mako b/alembic/script.py.mako new file mode 100644 index 000000000..55df2863d --- /dev/null +++ b/alembic/script.py.mako @@ -0,0 +1,24 @@ +"""${message} + +Revision ID: ${up_revision} +Revises: ${down_revision | comma,n} +Create Date: ${create_date} + +""" +from alembic import op +import sqlalchemy as sa +${imports if imports else ""} + +# revision identifiers, used by Alembic. +revision = ${repr(up_revision)} +down_revision = ${repr(down_revision)} +branch_labels = ${repr(branch_labels)} +depends_on = ${repr(depends_on)} + + +def upgrade() -> None: + ${upgrades if upgrades else "pass"} + + +def downgrade() -> None: + ${downgrades if downgrades else "pass"} diff --git a/db/app.db b/db/app.db new file mode 100644 index 000000000..daf50a8d7 Binary files /dev/null and b/db/app.db differ diff --git a/freebies.db b/freebies.db new file mode 100644 index 000000000..e69de29bb diff --git a/lib/__init__.py b/lib/__init__.py new file mode 100644 index 000000000..e69de29bb diff --git a/lib/alembic.ini b/lib/alembic.ini index 953863ddd..d4e146806 100644 --- a/lib/alembic.ini +++ b/lib/alembic.ini @@ -55,7 +55,8 @@ version_path_separator = os # Use os.pathsep. Default configuration used for ne # are written from script.py.mako # output_encoding = utf-8 -sqlalchemy.url = sqlite:///freebies.db +sqlalchemy.url = sqlite:///lib/freebies.db + [post_write_hooks] diff --git a/lib/base.py b/lib/base.py new file mode 100644 index 000000000..0ee3c969c --- /dev/null +++ b/lib/base.py @@ -0,0 +1,13 @@ + + +from sqlalchemy import create_engine +from sqlalchemy.ext.declarative import declarative_base +from sqlalchemy.orm import sessionmaker + +Base = declarative_base() + +engine = create_engine('sqlite:///freebies.db') + + +Session = sessionmaker(bind=engine) +session = Session() diff --git a/lib/company.py b/lib/company.py new file mode 100644 index 000000000..c1a2f9cb4 --- /dev/null +++ b/lib/company.py @@ -0,0 +1,34 @@ + + +from sqlalchemy import Column, Integer, String +from sqlalchemy.orm import relationship +from base import Base, session +from freebie import Freebie + +class Company(Base): + __tablename__ = 'companies' + + id = Column(Integer, primary_key=True) + name = Column(String) + founding_year = Column(Integer) + + freebies = relationship('Freebie', back_populates='company') + + @property + def devs(self): + + return list({freebie.dev for freebie in self.freebies}) + + ddef give_freebie(self, dev, item_name, value): + from sqlalchemy.orm import object_session + + new_freebie = Freebie(item_name=item_name, value=value, dev=dev, company=self) + current_session = object_session(self) + current_session.add(new_freebie) + current_session.commit() + + + @classmethod + def oldest_company(cls): + from base import session + return session.query(cls).order_by(cls.founding_year).first() diff --git a/lib/debug.py b/lib/debug.py index 4f922eb69..d4c0957b3 100644 --- a/lib/debug.py +++ b/lib/debug.py @@ -1,9 +1,8 @@ -#!/usr/bin/env python3 +# debug.py -from sqlalchemy import create_engine +from base import session +from company import Company +from dev import Dev +from freebie import Freebie -from models import Company, Dev - -if __name__ == '__main__': - engine = create_engine('sqlite:///freebies.db') - import ipdb; ipdb.set_trace() +import ipdb; ipdb.set_trace() diff --git a/lib/dev.py b/lib/dev.py new file mode 100644 index 000000000..9a763925f --- /dev/null +++ b/lib/dev.py @@ -0,0 +1,28 @@ + + +from sqlalchemy import Column, Integer, String +from sqlalchemy.orm import relationship +from base import Base, session + +class Dev(Base): + __tablename__ = 'devs' + + id = Column(Integer, primary_key=True) + name = Column(String) + + freebies = relationship('Freebie', back_populates='dev') + + @property + def companies(self): + + return list({freebie.company for freebie in self.freebies}) + + def received_one(self, item_name): + return any(freebie.item_name == item_name for freebie in self.freebies) + + def give_away(self, other_dev, freebie): + if freebie in self.freebies: + freebie.dev = other_dev + session.commit() + else: + print("Can't give away what you don't own!") diff --git a/lib/freebie.py b/lib/freebie.py new file mode 100644 index 000000000..a0be15279 --- /dev/null +++ b/lib/freebie.py @@ -0,0 +1,21 @@ +# freebie.py + +from sqlalchemy import Column, Integer, String, ForeignKey +from sqlalchemy.orm import relationship +from base import 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}" diff --git a/lib/freebies.db b/lib/freebies.db index 12beb1c96..8775edd85 100644 Binary files a/lib/freebies.db and b/lib/freebies.db differ diff --git a/lib/migrations/README b/lib/migrations/README index 98e4f9c44..c1d21e6a0 100644 --- a/lib/migrations/README +++ b/lib/migrations/README @@ -1 +1,25 @@ -Generic single-database configuration. \ No newline at end of file +# Freebie Tracker App + +A Phase 3 Python project using SQLAlchemy to model relationships between developers, companies, and the freebies given to devs. + +## Features + +- `Dev` can receive freebies from `Company` +- Track all freebies and which devs own them +- Find the oldest company +- Each freebie shows details (item name and value) + +## Requirements + +- Python 3.8+ +- SQLAlchemy +- Pytest + +## Setup + +Create a virtual environment and install dependencies: + +```bash +python3 -m venv .venv +source .venv/bin/activate +pip install -r requirements.txt diff --git a/lib/models.py b/lib/models.py index 2681bee5a..5276f4b23 100644 --- a/lib/models.py +++ b/lib/models.py @@ -1,29 +1,59 @@ -from sqlalchemy import ForeignKey, Column, Integer, String, MetaData -from sqlalchemy.orm import relationship, backref -from sqlalchemy.ext.declarative import declarative_base +# lib/models.py -convention = { - "fk": "fk_%(table_name)s_%(column_0_name)s_%(referred_table_name)s", -} -metadata = MetaData(naming_convention=convention) +from sqlalchemy import Column, Integer, String, ForeignKey +from sqlalchemy.orm import relationship, declarative_base -Base = declarative_base(metadata=metadata) +Base = declarative_base() + +class Dev(Base): + __tablename__ = 'devs' + + id = Column(Integer, primary_key=True) + name = Column(String) + + received_freebies = relationship("Freebie", back_populates="dev") + + def received_one(self, item_name): + return any(f.item_name == item_name for f in self.received_freebies) + + def give_away(self, other_dev, freebie): + if freebie in self.received_freebies: + freebie.dev = other_dev class Company(Base): __tablename__ = 'companies' - id = Column(Integer(), primary_key=True) - name = Column(String()) - founding_year = Column(Integer()) + id = Column(Integer, primary_key=True) + name = Column(String) + founding_year = Column(Integer) - def __repr__(self): - return f'' + freebies = relationship("Freebie", back_populates="company") -class Dev(Base): - __tablename__ = 'devs' + def give_freebie(self, dev, item_name, value, session): + new_freebie = Freebie( + item_name=item_name, + value=value, + dev=dev, + company=self + ) + session.add(new_freebie) + session.commit() + + @classmethod + def oldest_company(cls, session): + return session.query(cls).order_by(cls.founding_year).first() + +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')) - id = Column(Integer(), primary_key=True) - name= Column(String()) + dev = relationship("Dev", back_populates="received_freebies") + company = relationship("Company", back_populates="freebies") - def __repr__(self): - return f'' + def print_details(self): + print(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..2dca48193 100644 --- a/lib/seed.py +++ b/lib/seed.py @@ -1,3 +1,23 @@ -#!/usr/bin/env python3 -# Script goes here! + +from base import Base, engine, session +from company import Company +from dev import Dev +from freebie import Freebie + +Base.metadata.drop_all(engine) +Base.metadata.create_all(engine) + +apple = Company(name="Apple", founding_year=1976) +google = Company(name="Google", founding_year=1998) + + +alice = Dev(name="Alice") +bob = Dev(name="Bob") + +session.add_all([apple, google, alice, bob]) +session.commit() + +apple.give_freebie(alice, "Sticker", 5) +google.give_freebie(bob, "Tote Bag", 15) +apple.give_freebie(bob, "Water Bottle", 10) diff --git a/lib/tests/__init__.py b/lib/tests/__init__.py new file mode 100644 index 000000000..e69de29bb diff --git a/lib/tests/test_models.py b/lib/tests/test_models.py new file mode 100644 index 000000000..30c72b57b --- /dev/null +++ b/lib/tests/test_models.py @@ -0,0 +1,74 @@ +# lib/tests/test_models.py + +import pytest +from sqlalchemy import create_engine +from sqlalchemy.orm import sessionmaker +from lib.models import Base, Dev, Company, Freebie + +# Setup in-memory database fixture +@pytest.fixture +def session(): + engine = create_engine('sqlite:///:memory:') + Base.metadata.create_all(engine) + Session = sessionmaker(bind=engine) + session = Session() + yield session + session.close() + +def test_give_freebie_creates_freebie(session): + dev = Dev(name="Alice") + company = Company(name="Google", founding_year=1998) + session.add_all([dev, company]) + session.commit() + + company.give_freebie(dev, "Sticker", 1, session) + freebie = session.query(Freebie).first() + + assert freebie.item_name == "Sticker" + assert freebie.dev == dev + assert freebie.company == company + +def test_dev_received_one(session): + dev = Dev(name="Bob") + company = Company(name="Meta", founding_year=2004) + session.add_all([dev, company]) + session.commit() + + company.give_freebie(dev, "Mug", 5, session) + assert dev.received_one("Mug") is True + assert dev.received_one("Cap") is False + +def test_dev_give_away(session): + dev1 = Dev(name="Carol") + dev2 = Dev(name="Dave") + company = Company(name="Netflix", founding_year=1997) + session.add_all([dev1, dev2, company]) + session.commit() + + company.give_freebie(dev1, "Pen", 2, session) + freebie = dev1.received_freebies[0] + dev1.give_away(dev2, freebie) + + assert freebie.dev == dev2 + +def test_freebie_print_details(session, capsys): + dev = Dev(name="Eve") + company = Company(name="Amazon", founding_year=1994) + session.add_all([dev, company]) + session.commit() + + company.give_freebie(dev, "T-shirt", 10, session) + freebie = session.query(Freebie).first() + freebie.print_details() + + captured = capsys.readouterr() + assert "Eve owns a T-shirt from Amazon" in captured.out + +def test_oldest_company(session): + c1 = Company(name="IBM", founding_year=1911) + c2 = Company(name="Apple", founding_year=1976) + c3 = Company(name="Dell", founding_year=1984) + session.add_all([c1, c2, c3]) + session.commit() + + assert Company.oldest_company(session) == c1