104 lines
3.5 KiB
Python
104 lines
3.5 KiB
Python
import os
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from sqlalchemy import create_engine, event
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from sqlalchemy.orm import sessionmaker, declarative_base, Session
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BASE_DIR = os.path.dirname(os.path.abspath(__file__))
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DB_FILE = os.path.join(BASE_DIR, "avatar.db")
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DATABASE_URL = os.getenv("DATABASE_URL", f"sqlite:///{DB_FILE}")
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IS_SQLITE = DATABASE_URL.startswith("sqlite:")
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engine = create_engine(
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DATABASE_URL,
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connect_args={"check_same_thread": False, "timeout": 30} if IS_SQLITE else {},
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)
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if IS_SQLITE:
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@event.listens_for(engine, "connect")
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def _configure_sqlite_connection(dbapi_connection, _connection_record):
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cursor = dbapi_connection.cursor()
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try:
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cursor.execute("PRAGMA synchronous=NORMAL")
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cursor.execute("PRAGMA busy_timeout=30000")
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finally:
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cursor.close()
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SessionLocal = sessionmaker(bind=engine, autoflush=False, expire_on_commit=False)
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Base = declarative_base()
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def get_db():
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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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import models
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if IS_SQLITE:
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with engine.connect() as conn:
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conn.exec_driver_sql("PRAGMA journal_mode=WAL")
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conn.commit()
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Base.metadata.create_all(bind=engine)
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# 轻量迁移：为已存在的表补充新列（SQLite 不支持自动 ALTER，逐列尝试）
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_try_add_columns(
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("qa_pairs", "enabled", "BOOLEAN DEFAULT 1"),
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("knowledge_docs", "vectorized", "BOOLEAN DEFAULT 0"),
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("knowledge_docs", "embedding_model", "VARCHAR DEFAULT ''"),
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("knowledge_docs", "chunk_count", "INTEGER DEFAULT 0"),
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("knowledge_docs", "vectorized_at", "TIMESTAMP"),
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("avatars", "owner_id", "VARCHAR DEFAULT ''"),
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("authorizations", "takeover_enabled", "BOOLEAN DEFAULT 0"),
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("authorizations", "takeover_mode", "VARCHAR DEFAULT 'immediate'"),
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("authorizations", "takeover_delay_seconds", "INTEGER DEFAULT 180"),
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("avatars", "share_token", "VARCHAR DEFAULT NULL"),
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("token_account", "user_id", "VARCHAR DEFAULT ''"),
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("token_account", "total_granted", "BIGINT DEFAULT 0"),
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("token_account", "total_consumed", "BIGINT DEFAULT 0"),
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("token_account", "created_at", "TIMESTAMP"),
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("token_account", "updated_at", "TIMESTAMP"),
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("takeover_messages", "attachment_id", "VARCHAR DEFAULT NULL"),
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)
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_normalize_optional_unique_values()
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_normalize_takeover_delays()
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_create_token_indexes()
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def _try_add_columns(*cols):
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with engine.connect() as conn:
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for table, col, ddl in cols:
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try:
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conn.exec_driver_sql(f"ALTER TABLE {table} ADD COLUMN {col} {ddl}")
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conn.commit()
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except Exception:
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# 列已存在（或全新库由 create_all 建好）则忽略
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pass
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def _normalize_optional_unique_values():
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with engine.begin() as conn:
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conn.exec_driver_sql("UPDATE avatars SET share_token = NULL WHERE share_token = ''")
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def _normalize_takeover_delays():
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with engine.begin() as conn:
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# The old 30-second column default was never wired into the scheduler.
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conn.exec_driver_sql(
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"UPDATE authorizations SET takeover_delay_seconds = 180 "
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"WHERE takeover_delay_seconds IS NULL OR takeover_delay_seconds = 30"
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)
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def _create_token_indexes():
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with engine.begin() as conn:
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conn.exec_driver_sql(
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"CREATE UNIQUE INDEX IF NOT EXISTS ux_token_account_user_id "
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"ON token_account(user_id) WHERE user_id <> ''"
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)
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