39 lines
1.5 KiB
Python
39 lines
1.5 KiB
Python
"""暂停图并接收用户回答，不在恢复时重复调用模型"""
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from langgraph.types import interrupt
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from pydantic import ValidationError
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from app.processor.base import BaseNode
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from app.processor.state import QueryState
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from app.schemas.clarification_reply import ClarificationReply
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class WaitForUserNode(BaseNode):
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name = "wait_for_user_node"
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def process(self, state: QueryState) -> QueryState:
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payload = state["clarification"].model_dump(mode="json")
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while True:
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# interrupt 的控制异常必须交给 LangGraph 处理
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value = interrupt(payload)
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try:
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reply = ClarificationReply.model_validate(
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{"answer": value} if isinstance(value, str) else value
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)
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if not reply.cancel and reply.option_id is not None:
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if reply.option_id not in {
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option.id for option in state["clarification"].options
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}:
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raise ValueError("无效选项")
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break
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except (ValidationError, ValueError):
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payload = {
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**payload,
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"error": "请选择本题有效选项或填写回答，并提供有效的大屏数据；也可设置 cancel=true 取消",
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}
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return {
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**state,
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"clarification_reply": reply,
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"status": "cancelled" if reply.cancel else "running",
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}
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