77 lines
2.9 KiB
Python
77 lines
2.9 KiB
Python
"""场外基金专用 NL2SQL 适配器。"""
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from importlib import import_module
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from typing import cast
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from sqlalchemy import create_engine
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from sqlalchemy.engine import Engine
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from app.core.config import Settings, get_settings
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from app.core.contracts import RequestContext
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class OffsiteNl2SqlAdapter:
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"""把场外基金上下文转换为 query_dict 的稳定参数并执行只读查询。"""
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script_path = "nl2sql_yc.py"
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def __init__(
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self,
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db_engine: Engine | None = None,
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settings: Settings | None = None,
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) -> None:
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self._db_engine = db_engine
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self._settings = settings or get_settings()
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self._owns_engine = db_engine is None
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def query(self, question: str, context: RequestContext) -> dict[str, object]:
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try:
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query_dict = getattr(import_module("nl2sql_yc"), "query_dict", None)
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if not callable(query_dict):
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return {"status": "error", "message": "NL2SQL入口query_dict不存在"}
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db_engine = self._get_db_engine()
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result = cast(dict[str, object], query_dict(
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question,
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self._auth_context(context),
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db_engine=db_engine,
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use_llm=False,
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persist_audit=False,
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))
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if isinstance(result, dict):
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return result
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return {"status": "error", "message": "NL2SQL返回格式不正确"}
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except (OSError, RuntimeError, ValueError) as exc:
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return {"status": "error", "message": f"NL2SQL调用失败：{type(exc).__name__}"}
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def close(self) -> None:
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"""释放适配器自行创建的同步连接池。"""
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if self._owns_engine and self._db_engine is not None:
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self._db_engine.dispose()
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self._db_engine = None
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def _get_db_engine(self) -> Engine:
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if self._db_engine is not None:
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return self._db_engine
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dsn = self._settings.mysql_dsn
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if dsn.startswith("mysql+asyncmy://"):
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dsn = dsn.replace("mysql+asyncmy://", "mysql+pymysql://", 1)
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elif dsn.startswith("mysql://"):
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dsn = dsn.replace("mysql://", "mysql+pymysql://", 1)
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if not dsn:
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raise RuntimeError("未配置数据库连接")
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self._db_engine = create_engine(dsn, pool_pre_ping=True)
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return self._db_engine
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@staticmethod
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def _auth_context(context: RequestContext) -> dict[str, object]:
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return {
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"user_id": int(context.user_id) if context.user_id.isdigit() else None,
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"roles": list(context.roles),
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"allowed_domains": ["market_nav", "trading_account", "product_fee"],
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"customer_scope": context.data_scope if context.data_scope in {
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"self", "own_customers", "all",
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} else "all",
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"max_rows": 100,
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"max_query_seconds": 10,
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}
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