Connect to database and add first models

.gitignore

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+dev_database.db
+
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
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+*.so
+
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database/__init__.py

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+from .crud import *
+from .schemas import *
+from .database import get_session, init_models

database/crud.py

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+from sqlalchemy.ext.asyncio import AsyncSession
+from sqlalchemy.future import select
+
+from .models import *
+
+
+async def get_user(db: AsyncSession, user_id: int):
+    return await db.get(User, user_id)

database/database.py

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+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import sessionmaker
+from sqlalchemy.ext.asyncio import AsyncSession
+from sqlalchemy.ext.asyncio import create_async_engine
+
+DATABASE_URL = "sqlite+aiosqlite:///./dev_database.db"
+# DATABASE_URL = "postgresql://user:password@postgresserver/db"
+
+engine = create_async_engine(
+    DATABASE_URL, connect_args={"check_same_thread": False}, echo=True
+)
+async_session = sessionmaker(
+    engine, class_=AsyncSession, expire_on_commit=False)
+Base = declarative_base()
+
+
+async def get_session() -> AsyncSession:  # type: ignore
+    # Dependency
+    async with async_session() as session:  # type: ignore
+        yield session
+
+
+async def init_models():
+    async with engine.begin() as conn:
+        await conn.run_sync(Base.metadata.drop_all)
+        await conn.run_sync(Base.metadata.create_all)

database/models.py

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+
+from sqlalchemy import Boolean, Column, ForeignKey, Integer, String
+from sqlalchemy.orm import relationship
+
+from .database import Base
+
+
+class Game(Base):
+    __tablename__ = "games"
+
+    id = Column(Integer, primary_key=True)
+    title = Column(String)
+    description = Column(String)
+    language = Column(String)
+    version = Column(String)
+    download_size = Column(String)
+    upload_date = Column(String)
+
+    system = Column(String)
+    processor = Column(String)
+    memory = Column(String)
+    graphics = Column(String)
+    storage = Column(String)
+
+    owner_id = Column(Integer, ForeignKey("users.id"))
+    owner = relationship("User", back_populates="games")
+
+
+class User(Base):
+    __tablename__ = "users"
+
+    id = Column(Integer, primary_key=True)
+    email = Column(String, unique=True)
+    name = Column(String)
+    hash_of_password = Column(String)
+
+    games = relationship("Game", back_populates="owner")

database/schemas.py

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+from pydantic import BaseModel
+
+
+class GameBase(BaseModel):
+    title: str
+    description: str | None = None
+    language: str | None = None
+    version: str | None = None
+    download_size: str | None = None
+    upload_date: str | None = None
+
+    system: str | None = None
+    processor: str | None = None
+    memory: str | None = None
+    graphics: str | None = None
+    storage: str | None = None
+
+
+class GameCreate(GameBase):
+    pass
+
+
+class Game(GameBase):
+    id: int
+    owner_id: int
+
+    class Config:
+        orm_mode = True
+
+
+class UserBase(BaseModel):
+    email: str
+    name: str
+
+
+class UserCreate(UserBase):
+    password: str
+
+
+class User(UserBase):
+    id: int
+    games: list[Game] = []
+
+    class Config:
+        orm_mode = True

main.py

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+from typing import Union
+
+from fastapi import Depends, FastAPI, HTTPException
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from database import *
+
+app = FastAPI()
+
+
+@app.on_event("startup")
+async def startup_event():
+    await init_models()
+
+
+@app.get("/users/{user_id}", response_model=User)
+async def read_user(user_id: int, db: AsyncSession = Depends(get_session)):
+    db_user = await get_user(db, user_id=user_id)
+    print(db_user)
+    if db_user is None:
+        raise HTTPException(status_code=404, detail="User not found")
+    return db_user