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handsomezhuzhu
c5ecbeaec2
## 功能特性 ✅ **核心功能** - 多文件上传与智能去重（基于 content_hash） - 异步文档解析（支持 TXT/PDF/DOCX/XLSX） - AI 智能题目提取与评分（OpenAI/Anthropic/Qwen） - 断点续做与进度管理 - 自动错题本收集 ✅ **技术栈** - Backend: FastAPI + SQLAlchemy 2.0 + PostgreSQL - Frontend: React 18 + Vite + Tailwind CSS - Deployment: Docker Compose ✅ **项目结构** - 53 个文件 - 完整的前后端分离架构 - Docker/源码双模部署支持 🚀 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
133 lines
3.8 KiB
Python
133 lines
3.8 KiB
Python
"""
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Database configuration and session management
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"""
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from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession, async_sessionmaker
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from sqlalchemy.pool import NullPool
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from contextlib import asynccontextmanager
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from typing import AsyncGenerator
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import os
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from dotenv import load_dotenv
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# Load environment variables
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load_dotenv()
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# Get database URL from environment
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DATABASE_URL = os.getenv("DATABASE_URL")
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if not DATABASE_URL:
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raise ValueError("DATABASE_URL environment variable is not set")
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# Create async engine
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engine = create_async_engine(
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DATABASE_URL,
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echo=False, # Set to True for SQL query logging during development
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future=True,
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poolclass=NullPool if "sqlite" in DATABASE_URL else None,
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)
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# Create async session factory
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AsyncSessionLocal = async_sessionmaker(
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engine,
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class_=AsyncSession,
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expire_on_commit=False,
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autocommit=False,
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autoflush=False,
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)
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async def get_db() -> AsyncGenerator[AsyncSession, None]:
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"""
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Dependency for getting async database session.
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Usage in FastAPI:
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@app.get("/items")
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async def get_items(db: AsyncSession = Depends(get_db)):
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...
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"""
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async with AsyncSessionLocal() as session:
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try:
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yield session
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await session.commit()
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except Exception:
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await session.rollback()
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raise
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finally:
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await session.close()
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async def init_db():
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"""
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Initialize database tables.
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Should be called during application startup.
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"""
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from models import Base
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async with engine.begin() as conn:
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# Create all tables
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await conn.run_sync(Base.metadata.create_all)
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print("✅ Database tables created successfully")
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async def init_default_config(db: AsyncSession):
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"""
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Initialize default system configurations if not exists.
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"""
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from models import SystemConfig, User
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from sqlalchemy import select
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from passlib.context import CryptContext
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pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
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# Default configurations
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default_configs = {
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"allow_registration": os.getenv("ALLOW_REGISTRATION", "true"),
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"max_upload_size_mb": os.getenv("MAX_UPLOAD_SIZE_MB", "10"),
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"max_daily_uploads": os.getenv("MAX_DAILY_UPLOADS", "20"),
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"ai_provider": os.getenv("AI_PROVIDER", "openai"),
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}
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for key, value in default_configs.items():
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result = await db.execute(select(SystemConfig).where(SystemConfig.key == key))
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existing = result.scalar_one_or_none()
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if not existing:
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config = SystemConfig(key=key, value=str(value))
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db.add(config)
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print(f"✅ Created default config: {key} = {value}")
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# Create default admin user if not exists
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result = await db.execute(select(User).where(User.username == "admin"))
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admin = result.scalar_one_or_none()
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if not admin:
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admin_user = User(
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username="admin",
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hashed_password=pwd_context.hash("admin123"), # Change this password!
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is_admin=True
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)
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db.add(admin_user)
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print("✅ Created default admin user (username: admin, password: admin123)")
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print("⚠️ IMPORTANT: Please change the admin password immediately!")
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await db.commit()
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@asynccontextmanager
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async def get_db_context():
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"""
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Context manager for getting database session outside of FastAPI dependency injection.
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Usage:
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async with get_db_context() as db:
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result = await db.execute(...)
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"""
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async with AsyncSessionLocal() as session:
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try:
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yield session
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await session.commit()
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except Exception:
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await session.rollback()
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raise
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finally:
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await session.close()
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