Siirrä kipina-codebench projektin päätasolle

kipina-codebench/golden-examples/blog/models.py

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+"""Tietokantamallit — SQLAlchemy 2.0, Mapped-tyypitys, ForeignKey-relaatiot."""
+
+from datetime import datetime
+
+from sqlalchemy import String, Text, DateTime, ForeignKey, create_engine
+from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column, relationship, sessionmaker
+
+DATABASE_URL = "sqlite:///./app.db"
+engine = create_engine(DATABASE_URL, connect_args={"check_same_thread": False})
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+class Author(Base):
+    """Kirjoittaja — nimi, sähköposti ja bio."""
+
+    __tablename__ = "authors"
+
+    id: Mapped[int] = mapped_column(primary_key=True, index=True)
+    name: Mapped[str] = mapped_column(String(255))
+    email: Mapped[str] = mapped_column(String(255), unique=True)
+    bio: Mapped[str | None] = mapped_column(Text, default=None)
+
+    posts: Mapped[list["Post"]] = relationship(back_populates="author")
+
+
+class Post(Base):
+    """Blogipostaus — otsikko, sisältö, kirjoittaja, julkaisuaika ja tila."""
+
+    __tablename__ = "posts"
+
+    id: Mapped[int] = mapped_column(primary_key=True, index=True)
+    title: Mapped[str] = mapped_column(String(255))
+    content: Mapped[str] = mapped_column(Text)
+    author_id: Mapped[int] = mapped_column(ForeignKey("authors.id"))
+    published_at: Mapped[datetime | None] = mapped_column(DateTime, default=None)
+    status: Mapped[str] = mapped_column(String(20), default="draft")
+
+    author: Mapped["Author"] = relationship(back_populates="posts")
+
+
+Base.metadata.create_all(bind=engine)