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一、文案(前端约 1600 处,后端传到界面的约 880 处) - 术语统一:工作流层面用「运行」(继续运行、重新运行、试运行),节点和工具层面用「执行」,不再用「跑」; 总时长 / 执行时长 / 等待审批;服务端;助手;Agent;token;工作流;固定版本;模型接入;系统提示;批准 / 驳回;受管级别 - 口语改书面:取不到、没取回来、读不懂、连不上、多半、照样、兜底、揉成这类说法改成「无法 / 未能 / 失败 / 请」;去掉拟人写法 - 不再露出实现细节:界面上不写 checkpoint、同一拍、哈希(凭证处除外),不写改版历史(「以前…」「老数据」); 报错、校验、门禁、自动修复里裸写的配置键名和枚举值换成界面上的中文标签,由新的 backend/app/engine/labels.py 统一提供; 发布弹窗里结论句的选项不再是 off / require_citation - 同一件事只留一种说法:生成阶段文案、出具档位说明、画布锁定提示各合成一份 - 去掉界面上的工业场景示例(MES、ERP、「张工」「王工」)和真实产品名,换成通用示例 二、说错的提示(都有测试证明) - 数据库测连接失败时的专用提示以前从不出现(按报错文字全等比较,永远比不上):改为按错误类型判断,不再拼出重复的前缀 - 「设置 → 供应商」改指「设置 → 模型接入」;「在设置里建数据源」改指「数据」页 - 缺少 API Key、模型接入已停用的报错不再夹英文,写明去哪里填 - 两处原因说错(「这种引用在后续版本支持」「这一版还不支持」)改成真实原因 - 节点说明里不准确的说法改正:代码节点在 microVM 或系统沙箱中执行;报告撰写、口径卡的说明不再说过头 - 导出的证据 CSV 里两列同名,第三列改为「片段编号」 三、前后端对齐 - 前端按后端原文识别日志、报错的地方,新旧两种写法都认得(历史运行里存的是旧文字),逐条补了新旧原文的核对 - 后端交回模型的原指令放进单独的 for_model 字段,前端在解析响应时去掉,不会显示到界面上 四、检查 - 检查脚本里按原文匹配的断言改成新文案;改完会变成永远成立的反向断言逐条修正,并做了变异验证 - 新增 check-copy(静态扫描前端界面字符串和后端上界面的文案):再出现「跑」「后端」「多半」「令牌」、 界面上的 Copilot、裸写的配置键名、半角标点等就报错;确需保留的写进 scripts/copy-allow.json 并注明理由
373 lines
16 KiB
Python
373 lines
16 KiB
Python
from __future__ import annotations
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import asyncio
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import time
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from collections import defaultdict
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from typing import Any, Awaitable, Callable
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from langgraph.errors import GraphBubbleUp
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from langgraph.graph import END, START, StateGraph
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from app.core.errors import describe_exception, raw_detail
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from app.core.events import EventType
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from app.engine.context import NodeContext, NodeError, RunContext
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from app.engine.nodes import control, human, io, knowledge, llm, metrics, multi, report, tools
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from app.engine.schema import GraphNode, GraphSpec, NodeType, back_edges, innermost_loops
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from app.engine.state import GraphState
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NodeRunner = Callable[[GraphState, NodeContext], Awaitable[dict[str, Any]]]
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# 节点类型 -> 执行器。加一种新节点只需要在这里登记一行。
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RUNNERS: dict[NodeType, NodeRunner] = {
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NodeType.INPUT: io.run_input,
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NodeType.OUTPUT: io.run_output,
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NodeType.TRANSFORM: io.run_transform,
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NodeType.LLM: llm.run_llm,
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NodeType.AGENT: llm.run_agent,
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NodeType.SUPERVISOR: multi.run_supervisor,
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NodeType.SUBGRAPH: multi.run_subgraph,
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NodeType.TOOL: tools.run_tool,
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NodeType.CODE: tools.run_code,
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NodeType.BRANCH: control.run_branch,
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NodeType.LOOP: control.run_loop,
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NodeType.HUMAN: human.run_human,
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NodeType.VALIDATE: human.run_validate,
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NodeType.MEMORY: knowledge.run_memory,
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NodeType.METRICS: metrics.run_metrics,
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NodeType.RETRIEVE: knowledge.run_retrieve,
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NodeType.REPORT: report.run_report,
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}
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# 这些节点的出边由"决定"路由,不能直接连死
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ROUTING_TYPES = {NodeType.BRANCH, NodeType.LOOP}
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def _wrap(
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node: GraphNode, run_ctx: RunContext, loop_id: str | None = None,
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) -> Callable[[GraphState], Awaitable[dict[str, Any]]]:
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"""给节点执行器套上事件、计时、重试和错误处理。
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画布上看到的每一次高亮、每一条耗时,都来自这层包装;
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执行器本身只管自己那点业务逻辑。loop_id 是直接包住它的那层循环。
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"""
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runner = RUNNERS.get(node.type)
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ctx = NodeContext(node=node, run=run_ctx)
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async def _execute(state: GraphState) -> dict[str, Any]:
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if runner is None:
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raise NodeError(node.id, f"不支持的节点类型:{node.type}")
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# 允许节点配置跳过条件,不用为了"有时不执行"专门加一个分支节点
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skip_if = node.config.get("skip_if")
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if skip_if:
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from app.engine.expressions import eval_condition
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from app.engine.state import template_context
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if eval_condition(skip_if, template_context(state)):
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ctx.emit(EventType.NODE_SKIPPED, node_type=str(node.type), label=node.title,
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reason=f"满足跳过条件:{skip_if}")
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return {"nodes": {node.id: {"skipped": True}}}
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retries = int(node.config.get("retries", 0) or 0)
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backoff = float(node.config.get("retry_backoff", 1.0) or 1.0)
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started = time.perf_counter()
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ctx.emit(EventType.NODE_STARTED, node_type=str(node.type), label=node.title,
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**_started_context(node.id, state, run_ctx, loop_id))
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last_error: Exception | None = None
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for attempt in range(retries + 1):
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try:
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updates = await runner(state, ctx)
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elapsed = int((time.perf_counter() - started) * 1000)
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# 完整输出落工件库。事件里只放截断预览是给画布看的;
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# 出具溯源、周对比、轨迹提模板需要的是这份完整证据。
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artifact_id: str | None = None
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payload = (updates.get("nodes") or {}).get(node.id)
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if payload is not None:
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from app.core.artifact_store import put_json
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try:
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# 只记录、不回写:payload 和 run.output 可能是同一个对象,
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# 往里塞 __artifact__ 会污染最终成果。事件里携带 id 就够了。
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artifact_id = await put_json(
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payload,
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kind="node_output",
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run_id=run_ctx.run_id,
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node_id=node.id,
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meta={"type": str(node.type), "attempt": attempt + 1},
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)
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except Exception: # noqa: BLE001 - 工件写失败不该毁掉运行本身
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artifact_id = None
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ctx.emit(
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EventType.NODE_FINISHED,
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duration_ms=elapsed,
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attempt=attempt + 1,
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preview=_preview(updates, node.id),
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# assign_to 写进 vars 的值原先不在任何落库事件里,界面上
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# 的"变量当前值"只能从 preview 反推(data ?? text ?? 整个
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# output)。那个推断大多数时候对——而一个"大多数时候对"
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# 的调试工具比没有更糟:它会在你最需要它的那次骗你。
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# 如实发出来,只多一个已截断的值,且只有真的赋了值的节点才有。
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vars=_vars_preview(updates),
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artifact=artifact_id,
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# 这一步新记进证据台账的条目(口径卡的指标集工件等)。事件在封存范围
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# 内,证据接口从这里出发找工件,不去读可以事后插行的 artifacts 表。
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# 没产出证据的节点不带这个键,事件和以前一字不差
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**({"evidence": updates["evidence"]} if updates.get("evidence") else {}),
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)
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trail = {
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"node_id": node.id,
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"type": str(node.type),
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"duration_ms": elapsed,
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"attempt": attempt + 1,
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"ts": time.time(),
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}
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return {**updates, "trail": [trail]}
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except GraphBubbleUp:
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# interrupt() / Command 靠异常向上传递控制流,不是执行失败:
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# 必须原样放行,否则人工介入会被当成节点报错吞掉。
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raise
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except asyncio.CancelledError:
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raise
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except Exception as e: # noqa: BLE001
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# NodeError 以前在这里直接 raise,于是节点自己抛的错既不重试、
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# 也不发 node.failed、更不被 on_error=continue 接住。而 NodeError
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# 恰恰是所有执行器表达失败的标准方式(缺必填输入、模型没配、
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# 口径卡算不出…),等于这两个配置对最常见的报错全都不生效。
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last_error = e
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if attempt < retries:
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ctx.emit(
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EventType.LOG,
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level="warn",
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message=f"第 {attempt + 1} 次执行失败({_describe(e)}),即将重试",
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code="node_retry",
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)
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await asyncio.sleep(backoff * (2**attempt))
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continue
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break
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elapsed = int((time.perf_counter() - started) * 1000)
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message = _describe(last_error)
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# node_id 要带上:前端靠它把出错的节点从"转圈"收敛成"失败"。
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# error 是给人看的那句,原始异常放 detail,排查的人照样拿得到
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ctx.emit(EventType.NODE_FAILED, error=message, duration_ms=elapsed, node_id=node.id,
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detail=_detail(last_error))
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# 容错模式:记下错误继续往下走,而不是让整张图挂掉
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if node.config.get("on_error") == "continue":
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return {
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"nodes": {node.id: {"error": message, "failed": True}},
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"trail": [{"node_id": node.id, "error": message, "ts": time.time()}],
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}
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# 已经是 NodeError 就别再套一层,否则消息会变成
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# "NodeError: NodeError: 真正的原因"
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if isinstance(last_error, NodeError):
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raise last_error
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raise NodeError(node.id, message) from last_error
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async def _entry(state: GraphState) -> dict[str, Any]:
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return await _execute(state)
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return _entry
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def _describe(error: BaseException | None) -> str:
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"""错误消息。NodeError 的 message 本来就是写给人看的;别的异常翻成一句原因,
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不带类型名和内部符号——界面上出现过「_make_query_tool.<locals>._run() got an
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unexpected keyword argument」这种首行报错。"""
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if error is None:
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return "未知错误"
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if isinstance(error, NodeError):
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return str(error)
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return f"执行出错:{describe_exception(error)}"
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def _detail(error: BaseException | None) -> str | None:
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"""原始异常。NodeError 自己是人话,真正的原因在它包住的那个异常里。"""
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if isinstance(error, NodeError):
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return raw_detail(error.__cause__) if error.__cause__ is not None else None
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return raw_detail(error)
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def _started_context(
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node_id: str, state: GraphState, run_ctx: RunContext, loop_id: str | None,
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) -> dict[str, Any]:
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"""node.started 附带的上下文:在循环的第几轮,以及是不是恢复后的那次重放。"""
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out: dict[str, Any] = {}
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if loop_id:
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mark = (state.get("loops") or {}).get(loop_id)
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# 循环节点决定进 body 时已经把 index 推进到"这一轮的序号"(从 1 数)
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if isinstance(mark, dict) and not mark.get("finished") and mark.get("index"):
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out["iteration"] = int(mark["index"])
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pending = run_ctx.extra.get("resumed")
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if isinstance(pending, set) and node_id in pending:
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# 只有恢复后第一次跑到它才算重放;同一次运行里之后再进来是正常执行
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pending.discard(node_id)
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out["resumed"] = True
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return out
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def _vars_preview(updates: dict[str, Any]) -> dict[str, Any] | None:
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"""这一步往 vars 里写了什么。没写就不带这个字段。
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截断比 preview 更狠:这是给变量表当"当前值"用的,看个大概就够,
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要全文有工件库。事件是审计凭证,能省则省。
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"""
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written = updates.get("vars")
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if not isinstance(written, dict) or not written:
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return None
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out: dict[str, Any] = {}
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for key, value in list(written.items())[:20]:
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if isinstance(value, str):
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out[key] = value[:600]
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elif isinstance(value, (int, float, bool, type(None))):
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out[key] = value
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elif isinstance(value, list):
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out[key] = f"[{len(value)} 项]"
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elif isinstance(value, dict):
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out[key] = {k: str(v)[:120] for k, v in list(value.items())[:12]}
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else:
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out[key] = str(value)[:300]
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return out
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def _preview(updates: dict[str, Any], node_id: str) -> Any:
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"""给前端卡片用的输出摘要,避免把整坨数据塞进事件流。"""
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payload = (updates.get("nodes") or {}).get(node_id)
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if payload is None:
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return None
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if isinstance(payload, dict):
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out: dict[str, Any] = {}
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for key, value in payload.items():
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if isinstance(value, str):
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out[key] = value[:1200]
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elif isinstance(value, (int, float, bool, type(None))):
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out[key] = value
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elif isinstance(value, list):
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out[key] = f"[{len(value)} 项]"
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else:
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out[key] = str(value)[:300]
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return out
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return str(payload)[:1200]
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def _make_router(
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node: GraphNode, spec: GraphSpec
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) -> tuple[Callable[[GraphState], list[str] | str], dict[str, str]]:
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"""按节点写下的 __decision__ 把执行导向对应的边。
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路由函数必须是纯函数 —— LangGraph 会调用它决定下一跳,
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所以真正的判断逻辑放在节点执行阶段,这里只查表。
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"""
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mapping: dict[str, list[str]] = {}
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for edge in spec.outgoing(node.id):
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key = edge.sourceHandle or "default"
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mapping.setdefault(key, []).append(edge.target)
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default_targets = mapping.get("default") or []
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def route(state: GraphState) -> list[str] | str:
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payload = (state.get("nodes") or {}).get(node.id) or {}
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decision = payload.get("__decision__") if isinstance(payload, dict) else None
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targets = mapping.get(str(decision)) or default_targets
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return targets if targets else END
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path_map = {key: key for key in mapping}
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return route, path_map
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def _join_nodes(spec: GraphSpec, node_map: dict[str, GraphNode]) -> set[str]:
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"""有两个以上上游、要等汇齐了才能跑的节点。
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每条入边各 add_edge 一次时,LangGraph 的语义是"任何一个上游跑完就触发
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一次"。两条支路一样长,两次触发落在同一步里被合并,看不出问题;一长一短,
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汇合节点就先拿着短的那边跑一次、长的到了再跑一次——模型调用和工具副作用
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都翻倍,下游跟着重跑;循环体里的汇合还会让循环节点多推进一格,把 done
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出口提前放行。
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不用屏障(add_edge([a, b], j)):分支之后的二选一汇合,没走的那条永远
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不会到,屏障会一直等,而 LangGraph 没有可执行任务时会安静地结束——汇合
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节点和它下游的一切就这么被跳过了,连报错都没有。defer 的语义是"等图里
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其余待执行的任务都跑完,再跑这一次":该到的都到齐了,没走的也不会被等。
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代价是它也会等图里与它无关、恰好还在跑的支路。
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循环回边不算:循环节点的入边是"入口 + 回边",那不是汇合。
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"""
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entries = [n.id for n in spec.entry_nodes()]
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back = back_edges(node_map, spec.edges, roots=entries)
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upstream: dict[str, set[str]] = defaultdict(set)
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for e in spec.edges:
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if e.source not in node_map or e.target not in node_map:
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continue
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if (e.source, e.target, e.sourceHandle or "") in back:
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continue
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upstream[e.target].add(e.source)
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return {node_id for node_id, sources in upstream.items() if len(sources) >= 2}
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def compile_graph(spec: GraphSpec, run_ctx: RunContext) -> StateGraph:
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"""把图定义编译成未 compile 的 StateGraph。
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调用方负责挂 checkpointer 后再 .compile(),这样主图能带持久化、
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子图可以不带。
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"""
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builder = StateGraph(GraphState)
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node_map = spec.node_map()
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joins = _join_nodes(spec, node_map)
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enclosing = innermost_loops(spec)
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for node in spec.nodes:
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builder.add_node(node.id, _wrap(node, run_ctx, enclosing.get(node.id)),
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defer=node.id in joins)
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# 入口
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entries = spec.entry_nodes()
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if not entries:
|
|
raise ValueError("工作流没有起始节点")
|
|
for node in entries:
|
|
builder.add_edge(START, node.id)
|
|
|
|
# 边
|
|
for node in spec.nodes:
|
|
outgoing = spec.outgoing(node.id)
|
|
if not outgoing:
|
|
builder.add_edge(node.id, END)
|
|
continue
|
|
|
|
handles = {e.sourceHandle for e in outgoing if e.sourceHandle}
|
|
needs_routing = node.type in ROUTING_TYPES or (
|
|
node.type == NodeType.HUMAN and handles & {"approved", "rejected"}
|
|
)
|
|
|
|
if needs_routing:
|
|
route, path_map = _make_router(node, spec)
|
|
targets = {t for edge in outgoing for t in [edge.target] if t in node_map}
|
|
# path_map 用实际目标节点名,LangGraph 才知道有哪些可达分支
|
|
builder.add_conditional_edges(
|
|
node.id,
|
|
route,
|
|
sorted(targets) + [END],
|
|
)
|
|
else:
|
|
for edge in outgoing:
|
|
if edge.target in node_map:
|
|
builder.add_edge(node.id, edge.target)
|
|
|
|
return builder
|
|
|
|
|
|
def initial_state(payload: dict[str, Any] | None = None) -> GraphState:
|
|
data = dict(payload or {})
|
|
return {
|
|
"input": data,
|
|
"vars": dict(data),
|
|
"nodes": {},
|
|
"output": {},
|
|
"messages": [],
|
|
"usage": {},
|
|
"trail": [],
|
|
"loops": {},
|
|
}
|