80 lines
2.5 KiB
Python
80 lines
2.5 KiB
Python
"""
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data/database.py
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The base definitions for database access and definition
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"""
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from datetime import datetime
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import os
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from dotenv import load_dotenv
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from sqlalchemy import create_engine, Date, Integer, MetaData, String
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from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column, sessionmaker
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load_dotenv()
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"""
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Databse naming conventions.
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ix == index
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uq == unique constraint
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ck == check constraint
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fk == foreign key
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pk == primary key
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"""
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DATABASE_NAMING_CONVENTION = {
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"ix": "ix_%(table)s_%(column_0_label)s",
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"uq": "uq_%(table)s_%(column_0_label)s",
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"ck": "ck_%(table)s_%(column_0_label)s",
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"fk": "fk_%(table)s_%(column_0_label)s",
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"pk": "pk_%(table)s_%(column_0_label)s",
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}
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class Base(DeclarativeBase):
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metadata = MetaData(naming_convention=DATABASE_NAMING_CONVENTION)
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class DataAccessLayer:
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def __init__(self):
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self.engine = None
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self.conn_string = os.getenv("DATABASE_URL")
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def connect(self):
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self.engine = create_engine(self.conn_string)
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Base.metadata.create_all(self.engine)
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self.Session = sessionmaker(bind=self.engine)
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dal = DataAccessLayer()
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class PowerballDraw(Base):
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__tablename__ = 'powerball_draws'
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draw_date: Mapped[datetime.date] = mapped_column(Date, primary_key=True)
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main_ball1: Mapped[int] = mapped_column(Integer)
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main_ball2: Mapped[int] = mapped_column(Integer)
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main_ball3: Mapped[int] = mapped_column(Integer)
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main_ball4: Mapped[int] = mapped_column(Integer)
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main_ball5: Mapped[int] = mapped_column(Integer)
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powerball: Mapped[int] = mapped_column(Integer)
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power_play: Mapped[int] = mapped_column(Integer)
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def __repr__(self):
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return f"PowerballDraw({self.draw_date=}, {self.main_ball1=}, {self.main_ball2=}, {self.main_ball3=}, " \
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f"{self.main_ball4=}, {self.main_ball5=}, {self.powerball=}, {self.power_play=})"
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def __str__(self):
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return f"{self.draw_date}, [{self.main_ball1}, {self.main_ball2}, {self.main_ball3}, {self.main_ball4}, " \
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f"{self.main_ball5}], {self.powerball}, {self.power_play if self.power_play else 1}x"
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def __eq__(self, other):
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return self.draw_date == other.draw_date and self.main_ball1 == other.main_ball1 and \
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self.main_ball2 == other.main_ball2 and self.main_ball3 == other.main_ball3 and \
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self.main_ball4 == other.main_ball4 and self.main_ball5 == other.main_ball5 and \
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self.powerball == other.powerball and self.power_play == other.power_play
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