Siirrä kipina-codebench projektin päätasolle

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2026-04-14 09:44:14 +03:00
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"""FastAPI CRUD — kaksi endpoint-settiä, Author ja Post."""
from fastapi import FastAPI, Depends, HTTPException
from sqlalchemy.orm import Session
from models import SessionLocal, Author, Post
from schemas import AuthorCreate, AuthorResponse, PostCreate, PostResponse
app = FastAPI()
def get_db():
"""Tietokantasessio per pyyntö."""
db = SessionLocal()
try:
yield db
finally:
db.close()
# --- Author ---
@app.post("/authors/", response_model=AuthorResponse, status_code=201)
def create_author(item: AuthorCreate, db: Session = Depends(get_db)):
db_item = Author(**item.model_dump())
db.add(db_item)
db.commit()
db.refresh(db_item)
return db_item
@app.get("/authors/", response_model=list[AuthorResponse])
def list_authors(db: Session = Depends(get_db)):
return db.query(Author).all()
@app.get("/authors/{item_id}", response_model=AuthorResponse)
def get_author(item_id: int, db: Session = Depends(get_db)):
item = db.query(Author).filter(Author.id == item_id).first()
if not item:
raise HTTPException(status_code=404, detail="Author not found")
return item
@app.put("/authors/{item_id}", response_model=AuthorResponse)
def update_author(item_id: int, item: AuthorCreate, db: Session = Depends(get_db)):
db_item = db.query(Author).filter(Author.id == item_id).first()
if not db_item:
raise HTTPException(status_code=404, detail="Author not found")
for key, value in item.model_dump().items():
setattr(db_item, key, value)
db.commit()
db.refresh(db_item)
return db_item
@app.delete("/authors/{item_id}", status_code=204)
def delete_author(item_id: int, db: Session = Depends(get_db)):
db_item = db.query(Author).filter(Author.id == item_id).first()
if not db_item:
raise HTTPException(status_code=404, detail="Author not found")
db.delete(db_item)
db.commit()
# --- Post ---
@app.post("/posts/", response_model=PostResponse, status_code=201)
def create_post(item: PostCreate, db: Session = Depends(get_db)):
db_item = Post(**item.model_dump())
db.add(db_item)
db.commit()
db.refresh(db_item)
return db_item
@app.get("/posts/", response_model=list[PostResponse])
def list_posts(db: Session = Depends(get_db)):
return db.query(Post).all()
@app.get("/posts/{item_id}", response_model=PostResponse)
def get_post(item_id: int, db: Session = Depends(get_db)):
item = db.query(Post).filter(Post.id == item_id).first()
if not item:
raise HTTPException(status_code=404, detail="Post not found")
return item
@app.put("/posts/{item_id}", response_model=PostResponse)
def update_post(item_id: int, item: PostCreate, db: Session = Depends(get_db)):
db_item = db.query(Post).filter(Post.id == item_id).first()
if not db_item:
raise HTTPException(status_code=404, detail="Post not found")
for key, value in item.model_dump().items():
setattr(db_item, key, value)
db.commit()
db.refresh(db_item)
return db_item
@app.delete("/posts/{item_id}", status_code=204)
def delete_post(item_id: int, db: Session = Depends(get_db)):
db_item = db.query(Post).filter(Post.id == item_id).first()
if not db_item:
raise HTTPException(status_code=404, detail="Post not found")
db.delete(db_item)
db.commit()

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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)

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"""Pydantic v2 -skeemat — Create sisääntulolle, Response vastaukselle."""
from datetime import datetime
from pydantic import BaseModel, ConfigDict
class AuthorCreate(BaseModel):
"""Uuden kirjoittajan luonti. Pakolliset: name, email."""
name: str
email: str
bio: str | None = None
class AuthorResponse(AuthorCreate):
"""Palautettava kirjoittaja — sisältää id:n."""
id: int
model_config = ConfigDict(from_attributes=True)
class PostCreate(BaseModel):
"""Uuden postauksen luonti. Pakolliset: title, content, author_id."""
title: str
content: str
author_id: int
published_at: datetime | None = None
status: str = "draft"
class PostResponse(PostCreate):
"""Palautettava postaus — sisältää id:n."""
id: int
model_config = ConfigDict(from_attributes=True)

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"""Pytest — TestClient, erillinen test.db, uniikki data per testi."""
from fastapi.testclient import TestClient
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker
from main import app, get_db
from models import Base
test_engine = create_engine(
"sqlite:///./test.db", connect_args={"check_same_thread": False}
)
TestSession = sessionmaker(autocommit=False, autoflush=False, bind=test_engine)
Base.metadata.create_all(bind=test_engine)
def override_get_db():
db = TestSession()
try:
yield db
finally:
db.close()
app.dependency_overrides[get_db] = override_get_db
client = TestClient(app)
def _create_author(name="Eino Leino", email=None):
"""Apufunktio kirjoittajan luomiseen testeissä."""
if email is None:
email = f"{name.lower().replace(' ', '.')}@example.com"
return client.post(
"/authors/", json={"name": name, "email": email}
).json()
# --- Author-testit ---
def test_create_author():
response = client.post(
"/authors/",
json={"name": "Aleksis Kivi", "email": "aleksis@example.com", "bio": "Suomen kansalliskirjailija"},
)
assert response.status_code == 201
assert response.json()["name"] == "Aleksis Kivi"
assert response.json()["bio"] == "Suomen kansalliskirjailija"
assert "id" in response.json()
def test_list_authors():
_create_author("Minna Canth", "minna.canth@example.com")
response = client.get("/authors/")
assert response.status_code == 200
assert len(response.json()) >= 1
def test_get_author_by_id():
created = _create_author("Väinö Linna", "vaino.linna@example.com")
response = client.get(f"/authors/{created['id']}")
assert response.status_code == 200
assert response.json()["id"] == created["id"]
def test_get_author_not_found():
response = client.get("/authors/99999")
assert response.status_code == 404
def test_update_author():
created = _create_author("Vanha Nimi", "vanha.nimi@example.com")
response = client.put(
f"/authors/{created['id']}",
json={"name": "Uusi Nimi", "email": "uusi.nimi@example.com"},
)
assert response.status_code == 200
assert response.json()["name"] == "Uusi Nimi"
def test_delete_author():
created = _create_author("Poistettava Kirjailija", "poistettava@example.com")
response = client.delete(f"/authors/{created['id']}")
assert response.status_code == 204
response = client.get(f"/authors/{created['id']}")
assert response.status_code == 404
# --- Post-testit ---
def test_create_post():
author = _create_author("Tove Jansson", "tove.jansson@example.com")
response = client.post(
"/posts/",
json={"title": "Muumipeikko ja pyrstötähti", "content": "Eräänä aamuna...", "author_id": author["id"]},
)
assert response.status_code == 201
assert response.json()["title"] == "Muumipeikko ja pyrstötähti"
assert response.json()["author_id"] == author["id"]
assert response.json()["status"] == "draft"
def test_list_posts():
author = _create_author("Juhani Aho", "juhani.aho@example.com")
client.post(
"/posts/",
json={"title": "Rautatie", "content": "Junasta kertova novelli.", "author_id": author["id"]},
)
response = client.get("/posts/")
assert response.status_code == 200
assert len(response.json()) >= 1
def test_get_post_by_id():
author = _create_author("Elias Lönnrot", "elias.lonnrot@example.com")
created = client.post(
"/posts/",
json={"title": "Kalevala", "content": "Vaka vanha Väinämöinen.", "author_id": author["id"]},
).json()
response = client.get(f"/posts/{created['id']}")
assert response.status_code == 200
assert response.json()["id"] == created["id"]
def test_get_post_not_found():
response = client.get("/posts/99999")
assert response.status_code == 404
def test_update_post():
author = _create_author("Joel Lehtonen", "joel.lehtonen@example.com")
created = client.post(
"/posts/",
json={"title": "Vanha otsikko", "content": "Alkuperäinen teksti.", "author_id": author["id"]},
).json()
response = client.put(
f"/posts/{created['id']}",
json={"title": "Päivitetty otsikko", "content": "Muokattu teksti.", "author_id": author["id"], "status": "published"},
)
assert response.status_code == 200
assert response.json()["title"] == "Päivitetty otsikko"
assert response.json()["status"] == "published"
def test_delete_post():
author = _create_author("Aino Kallas", "aino.kallas@example.com")
created = client.post(
"/posts/",
json={"title": "Poistettava postaus", "content": "Tämä poistetaan.", "author_id": author["id"]},
).json()
response = client.delete(f"/posts/{created['id']}")
assert response.status_code == 204
response = client.get(f"/posts/{created['id']}")
assert response.status_code == 404
def test_post_belongs_to_author():
author = _create_author("Sofi Oksanen", "sofi.oksanen@example.com")
post = client.post(
"/posts/",
json={"title": "Puhdistus", "content": "Romaani Virosta.", "author_id": author["id"]},
).json()
assert post["author_id"] == author["id"]