74 lines
2.1 KiB
Python
74 lines
2.1 KiB
Python
"""数据库引擎与会话管理"""
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from pathlib import Path
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from sqlalchemy import create_engine
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from sqlalchemy.orm import sessionmaker, declarative_base
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DB_PATH = Path(__file__).parent.parent.parent / "data" / "web.db"
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DB_PATH.parent.mkdir(parents=True, exist_ok=True)
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engine = create_engine(
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f"sqlite:///{DB_PATH}",
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connect_args={"check_same_thread": False},
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echo=False,
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)
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SessionLocal = sessionmaker(bind=engine, autocommit=False, autoflush=False)
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Base = declarative_base()
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def get_db():
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"""FastAPI 依赖：提供数据库会话，请求结束自动关闭。"""
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db = SessionLocal()
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try:
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yield db
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finally:
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db.close()
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def init_db():
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"""建表 + 写入初始数据。"""
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Base.metadata.create_all(bind=engine)
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_migrate()
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_seed()
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def _migrate():
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"""数据库迁移：为已有表添加新列。"""
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from sqlalchemy import text
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with engine.connect() as conn:
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# 检查 accounts.tag 列是否存在
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result = conn.execute(text("PRAGMA table_info(accounts)"))
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columns = [row[1] for row in result]
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if 'tag' not in columns:
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conn.execute(text("ALTER TABLE accounts ADD COLUMN tag VARCHAR(64) DEFAULT ''"))
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conn.commit()
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# 检查 users.custom_permissions 列是否存在
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result = conn.execute(text("PRAGMA table_info(users)"))
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columns = [row[1] for row in result]
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if 'custom_permissions' not in columns:
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conn.execute(text("ALTER TABLE users ADD COLUMN custom_permissions JSON DEFAULT NULL"))
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conn.commit()
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def _seed():
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"""写入默认超管账号和角色。"""
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from .models import User
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from .security import hash_password
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db = SessionLocal()
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try:
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if not db.query(User).first():
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admin = User(
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username="admin",
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password_hash=hash_password("admin123"),
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role="super_admin",
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is_active=True,
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remark="默认超级管理员",
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)
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db.add(admin)
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db.commit()
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finally:
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db.close()
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