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ThearchyHelios
c980da65d0
库里 28 条 failed 的构成说明了为什么值得单独开这条路：
模型 id 写错（404） 7
循环条件语法错 3
401 3
工具参数名不对 3
缺必填输入 2
大半是**配置错了**，改一下就能跑。而"改一下再跑"原来意味着整张图从头来
一遍——前面花两分钟查完的表结构、跑完的 SQL 全部重跑，尽管那些结果一直
躺在 checkpoint 里。checkpointer 本来就一直开着（thread_id = run_id），
挡住这条路的只是 resume 里的一行状态判定：它只认 interrupted，failed 进不去。
**带着改过的图续。** 不让改配置的话这功能基本没用：上面那几类续下去会
立刻再撞同一个错。所以 /runs/{id}/continue 接受一张改过的图，画布上点
「接着跑」带的就是当前编辑中的那张——用户正是改完它才点的。
**但只准改配置。** checkpoint 是按节点名存的（编译时 add_node(node.id)），
而节点配置是运行时从 spec 现读的（NodeContext.cfg）。所以只改配置对得上，
增删节点或改连线就对不上——续下去会拿着错位的通道状态跑出一份似是而非的
结果，比直接报错糟得多。加了 schema.topology_of() 做这道判据：节点 id +
类型 + 边，不含任何配置；对不上就 409，让用户重新发起。
这正是 resume 那边踩过的坑的同一类：不看有没有 checkpoint 就发 Command，
LangGraph 拿空 state 从 START 重跑，最后还落成 succeeded。所以这里也先问
一次 aget_state，没有待跑节点就拒绝，而不是硬发一个 None 下去。
时间线上要说清楚是接着跑、保了几步（"从「lp」接着跑，前面 2 个节点的结果
保留"）——否则用户看到时间线又动起来，分不清这次是续的还是整张图又跑了一遍。
验证：后端 249 passed（新增 test_continue_run.py 7 条，核心那条断言的是
node.started 事件——前面的节点确实没有再出现）。端到端真跑了一遍：
第一遍 start → prep → lp 挂在 lp，改好条件后第二遍只跑 lp → out，
成果里带着 prep 那步的结果；改了结构的图被 409 拒绝；没有失败的运行时
画布上不显示这个按钮。
顺带：_drive 里 resumed 的判定漏了 payload is None 这种（从 checkpoint
直接往下走），run.started 事件会说成不是续跑。
507 lines
18 KiB
Python
507 lines
18 KiB
Python
from __future__ import annotations
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import asyncio
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import contextlib
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from typing import Any
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from fastapi import APIRouter, Depends, Header, HTTPException, Query, WebSocket, WebSocketDisconnect
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from pydantic import BaseModel, Field
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from sqlalchemy import select
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from sqlalchemy.ext.asyncio import AsyncSession
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from sqlalchemy import select as _select
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from app.core.bus import bus
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from app.core import artifact_store
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from app.db.base import SessionLocal, get_session
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from app.db.models import Approval, Artifact, Run, RunEvent, Workflow, WorkflowVersion
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from app.engine.governance import unresolved_caliber_upgrades
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from app.engine.runner import run_manager
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from app.engine.schema import GraphSpec
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router = APIRouter(prefix="/api/runs", tags=["runs"])
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class StartRunIn(BaseModel):
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workflow_id: str | None = None
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graph: dict[str, Any] | None = None # 直接跑一张未保存的图（画布上的"试运行"）
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input: dict[str, Any] = Field(default_factory=dict)
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memory_scope: str = "default"
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collection: str = "default"
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# formal：从已发布的不可变版本发起，可复现可出具；exploratory：随便玩
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run_class: str = "exploratory"
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version: int | None = None # formal 时可指定版本，默认用已发布版本
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class RunOut(BaseModel):
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id: str
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workflow_id: str | None
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workflow_name: str
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status: str
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input: dict[str, Any]
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output: dict[str, Any]
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error: str | None
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usage: dict[str, Any]
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run_class: str | None = "exploratory"
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version: int | None = None
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version_hash: str | None = None
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manifest_hash: str | None = None
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started_by: str | None = None
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created_at: Any = None
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started_at: Any = None
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finished_at: Any = None
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model_config = {"from_attributes": True}
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@router.post("", response_model=RunOut, status_code=201)
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async def start_run(
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payload: StartRunIn,
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session: AsyncSession = Depends(get_session),
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x_actor: str | None = Header(default=None),
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) -> Run:
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actor = (x_actor or "").strip() or None
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name = "临时图"
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version: int | None = None
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version_hash: str | None = None
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if payload.run_class == "formal":
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# 正式运行的全部语义就这一条规则：必须引用一个不可变的已发布版本。
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# 传裸 graph、或工作流还没发布过，都进不了 formal。
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if not payload.workflow_id:
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raise HTTPException(400, "正式运行必须指定 workflow_id")
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if payload.graph is not None:
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raise HTTPException(400, "正式运行不接受临时 graph——先保存并发布版本")
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workflow = await session.get(Workflow, payload.workflow_id)
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if not workflow:
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raise HTTPException(404, "工作流不存在")
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# 只看 published_version：status 反映的是当前画布（改过图就退回 draft），
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# 而 formal 跑的是已发布的那一版，两者本来就可以不一致
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if not workflow.published_version:
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raise HTTPException(409, f"「{workflow.name}」还没有发布版本，先在编排页发布")
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version = payload.version or workflow.published_version
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# "不可变"和"过过闸"是两件事。快照确实不可变，但 PATCH 保存出来的
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# 草稿版本同样有快照——只认 version 存不存在的话，工作流只要发布过
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# 任意一个版本，之后所有草稿都能以 formal 身份启动，发布期的
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# validate_graph + lint_for_publish 全部绕过。
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if version != workflow.published_version:
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raise HTTPException(
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409,
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f"v{version} 不是当前发布版本（v{workflow.published_version}）。"
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"正式运行只能引用发布过的版本——要跑这一版就先发布它。",
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)
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snapshot = (
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await session.execute(
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_select(WorkflowVersion).where(
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WorkflowVersion.workflow_id == workflow.id,
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WorkflowVersion.version == version,
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)
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)
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).scalar_one_or_none()
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if not snapshot:
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raise HTTPException(404, f"版本 v{version} 不存在")
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graph = snapshot.graph
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version_hash = snapshot.graph_hash or artifact_store.graph_hash(graph)
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name = workflow.name
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# 口径升版是被迫处置的事件：钉住的方法卡有新版本而未声明策略，拒绝启动
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spec = GraphSpec.model_validate(graph)
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errors, upgrade_events = await unresolved_caliber_upgrades(session, spec)
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if errors:
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raise HTTPException(409, "；".join(errors))
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else:
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graph = payload.graph
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upgrade_events = []
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if payload.workflow_id:
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workflow = await session.get(Workflow, payload.workflow_id)
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if not workflow:
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raise HTTPException(404, "工作流不存在")
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graph = graph or workflow.graph
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name = workflow.name
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if not graph:
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raise HTTPException(400, "需要提供 workflow_id 或 graph")
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try:
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run = await run_manager.start(
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graph=graph,
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input_payload=payload.input,
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workflow_id=payload.workflow_id,
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workflow_name=name,
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memory_scope=payload.memory_scope,
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collection=payload.collection,
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run_class="formal" if payload.run_class == "formal" else "exploratory",
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version=version,
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version_hash=version_hash,
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started_by=actor,
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)
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except ValueError as e:
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raise HTTPException(400, str(e)) from e
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# 已声明策略的升版记入事件流，出具物上能看到"这期换口径了、怎么处置的"
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for ev in upgrade_events:
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payload_ev = dict(ev)
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node = payload_ev.pop("node_id", None)
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await run_manager.note(run.id, "caliber.upgrade", node_id=node, **payload_ev)
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return run
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@router.get("", response_model=list[RunOut])
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async def list_runs(
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workflow_id: str | None = None,
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status: str | None = None,
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limit: int = Query(default=50, le=200),
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session: AsyncSession = Depends(get_session),
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) -> list[Run]:
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stmt = select(Run).order_by(Run.created_at.desc()).limit(limit)
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if workflow_id:
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stmt = stmt.where(Run.workflow_id == workflow_id)
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if status:
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stmt = stmt.where(Run.status == status)
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return list((await session.execute(stmt)).scalars())
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@router.get("/{run_id}", response_model=RunOut)
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async def get_run(run_id: str, session: AsyncSession = Depends(get_session)) -> Run:
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run = await session.get(Run, run_id)
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if not run:
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raise HTTPException(404, "运行记录不存在")
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return run
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@router.get("/{run_id}/events")
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async def get_events(
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run_id: str,
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after: int = 0,
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session: AsyncSession = Depends(get_session),
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) -> list[dict[str, Any]]:
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"""拉历史事件。刷新页面后重建时间线用这个，再接 WebSocket 续上实时流。"""
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rows = await session.execute(
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select(RunEvent)
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.where(RunEvent.run_id == run_id, RunEvent.seq > after)
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.order_by(RunEvent.seq)
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)
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return [
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{
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"id": e.id,
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"run_id": e.run_id,
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"seq": e.seq,
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"type": e.type,
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"node_id": e.node_id,
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"ts": e.ts,
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"data": e.data,
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}
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for e in rows.scalars()
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]
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@router.get("/{run_id}/artifacts")
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async def list_artifacts(
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run_id: str, session: AsyncSession = Depends(get_session)
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) -> list[dict[str, Any]]:
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"""这次运行产出的全部工件引用。审阅出具物时从这里下钻到完整证据。"""
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rows = await session.execute(
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select(Artifact).where(Artifact.run_id == run_id).order_by(Artifact.created_at)
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)
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return [
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{
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"id": a.id,
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"kind": a.kind,
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"node_id": a.node_id,
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"size": a.size,
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"meta": a.meta,
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"created_at": a.created_at.isoformat() if a.created_at else None,
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}
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for a in rows.scalars()
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]
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@router.post("/{run_id}/cancel")
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async def cancel_run(run_id: str) -> dict[str, Any]:
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stopped = await run_manager.cancel(run_id)
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if not stopped:
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raise HTTPException(409, "该运行当前不在执行中")
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return {"ok": True}
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class ResumeIn(BaseModel):
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response: Any = None
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approval_id: str | None = None
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@router.post("/{run_id}/resume", response_model=RunOut)
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async def resume_run(
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run_id: str, payload: ResumeIn, x_actor: str | None = Header(default=None)
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) -> Run:
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try:
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# approval_id 以前定义了却从没传下去——一次运行里有多条待审批时，
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# 引擎无从知道这次回复的是哪一条
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return await run_manager.resume(
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run_id, payload.response,
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approval_id=payload.approval_id,
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actor=(x_actor or "").strip() or None,
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)
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except KeyError as e:
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raise HTTPException(404, str(e)) from e
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except ValueError as e:
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raise HTTPException(409, str(e)) from e
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class ContinueIn(BaseModel):
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"""接着跑。graph 只能带改过配置的同一张图，结构必须一致。"""
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graph: dict[str, Any] | None = None
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@router.post("/{run_id}/continue", response_model=RunOut)
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async def continue_run(
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run_id: str, payload: ContinueIn, x_actor: str | None = Header(default=None)
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) -> Run:
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"""从失败的节点接着跑，前面跑过的不重来。
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和 /resume 不是一回事：那条是人工介入的断点（status=interrupted），这条是
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真的挂了（status=failed）。挡住后者的原来只是 resume 里的一行状态判定，
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而 checkpoint 一直都在——改个模型 id 就得把前面两分钟的取数重跑一遍，
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纯属白等。
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"""
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try:
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return await run_manager.continue_failed(
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run_id, graph=payload.graph, actor=(x_actor or "").strip() or None,
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)
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except KeyError as e:
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raise HTTPException(404, str(e)) from e
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except ValueError as e:
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raise HTTPException(409, str(e)) from e
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@router.get("/{run_id}/state")
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async def get_state(run_id: str) -> dict[str, Any]:
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"""读取 checkpoint 里的当前状态。调试中断中的 run 时很有用。"""
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from app.engine.compiler import compile_graph
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from app.engine.context import RunContext
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from app.engine.schema import GraphSpec
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async with SessionLocal() as session:
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run = await session.get(Run, run_id)
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if not run:
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raise HTTPException(404, "运行记录不存在")
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spec = GraphSpec.model_validate(run.graph)
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app = compile_graph(spec, RunContext(run_id=run_id, thread_id=run_id, spec=spec)).compile(
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checkpointer=run_manager.checkpointer
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)
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snapshot = await app.aget_state({"configurable": {"thread_id": run_id}})
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values = dict(snapshot.values or {})
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values.pop("messages", None) # 消息对象不好直接序列化，前端也用不到
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return {
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"values": _jsonable(values),
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"next": list(snapshot.next or ()),
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"interrupts": [
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{"id": getattr(i, "id", None), "value": _jsonable(getattr(i, "value", None))}
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for i in (snapshot.interrupts or ())
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],
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}
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@router.get("/{run_id}/history")
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async def get_history(run_id: str, limit: int = 50) -> list[dict[str, Any]]:
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"""checkpoint 历史 —— 可以看到每一步之后的状态快照，用来做时间旅行式调试。"""
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from app.engine.compiler import compile_graph
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from app.engine.context import RunContext
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from app.engine.schema import GraphSpec
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async with SessionLocal() as session:
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run = await session.get(Run, run_id)
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if not run:
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raise HTTPException(404, "运行记录不存在")
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spec = GraphSpec.model_validate(run.graph)
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app = compile_graph(spec, RunContext(run_id=run_id, thread_id=run_id, spec=spec)).compile(
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checkpointer=run_manager.checkpointer
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)
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out: list[dict[str, Any]] = []
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async for snapshot in app.aget_state_history({"configurable": {"thread_id": run_id}}):
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values = dict(snapshot.values or {})
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values.pop("messages", None)
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out.append(
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{
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"checkpoint_id": snapshot.config.get("configurable", {}).get("checkpoint_id"),
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"next": list(snapshot.next or ()),
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"created_at": snapshot.created_at,
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"trail": _jsonable(values.get("trail") or [])[-1:],
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"nodes_done": list((values.get("nodes") or {}).keys()),
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}
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)
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if len(out) >= limit:
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break
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return out
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@router.delete("/{run_id}", status_code=204)
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async def delete_run(run_id: str, session: AsyncSession = Depends(get_session)) -> None:
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run = await session.get(Run, run_id)
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if not run:
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raise HTTPException(404, "运行记录不存在")
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await session.delete(run)
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await session.commit()
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# --------------------------------------------------------------------------
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# 实时事件流
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# --------------------------------------------------------------------------
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@router.websocket("/{run_id}/stream")
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async def stream_run(websocket: WebSocket, run_id: str) -> None:
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"""把一次运行的事件推给前端。
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先补历史再接实时，所以中途打开页面、或者刷新之后，时间线都是完整的。
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"""
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await websocket.accept()
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after = int(websocket.query_params.get("after", 0) or 0)
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# 先占订阅位，再读历史。反过来的话，两步之间图正好跑出来的事件既不在
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# 历史里、也不在实时流里——永远丢了。实测就是这样：一次跑图的开头
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# 两三条 node.started/node.finished 消失，界面上表现为某个节点永远
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# 在转圈、它的子步骤跑到了顶层。
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subscription = bus.attach(run_id)
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try:
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last_seq = after
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async with SessionLocal() as session:
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rows = await session.execute(
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select(RunEvent)
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.where(RunEvent.run_id == run_id, RunEvent.seq > after)
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.order_by(RunEvent.seq)
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)
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for event in rows.scalars():
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last_seq = max(last_seq, event.seq or 0)
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await websocket.send_json(
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{
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"seq": event.seq,
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"type": event.type,
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"node_id": event.node_id,
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"ts": event.ts,
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"data": event.data,
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"replay": True,
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}
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)
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run = await session.get(Run, run_id)
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||
|
||
# 已经结束的 run 没有后续事件，补完历史就关掉
|
||
if run and run.status in ("succeeded", "failed", "cancelled"):
|
||
await websocket.send_json({"type": "stream.end", "status": run.status})
|
||
await websocket.close()
|
||
return
|
||
|
||
# 占位期间攒下的那几条历史里也有，按 seq 滤掉，否则前端同一步收两遍
|
||
pump = asyncio.create_task(_pump(websocket, subscription.stream(after=last_seq)))
|
||
try:
|
||
# 客户端断开时读操作会抛异常，用它来结束这条连接
|
||
while True:
|
||
await websocket.receive_text()
|
||
except WebSocketDisconnect:
|
||
pass
|
||
finally:
|
||
pump.cancel()
|
||
with contextlib.suppress(asyncio.CancelledError):
|
||
await pump
|
||
except WebSocketDisconnect:
|
||
return
|
||
except Exception: # noqa: BLE001
|
||
with contextlib.suppress(Exception):
|
||
await websocket.close()
|
||
finally:
|
||
subscription.close()
|
||
|
||
|
||
async def _pump(websocket: WebSocket, stream: Any) -> None:
|
||
try:
|
||
async for event in stream:
|
||
await websocket.send_json(event.to_wire())
|
||
except (WebSocketDisconnect, RuntimeError):
|
||
return
|
||
|
||
|
||
# --------------------------------------------------------------------------
|
||
# 审批
|
||
# --------------------------------------------------------------------------
|
||
|
||
approvals_router = APIRouter(prefix="/api/approvals", tags=["approvals"])
|
||
|
||
|
||
class ApprovalOut(BaseModel):
|
||
id: str
|
||
run_id: str
|
||
node_id: str
|
||
mode: str
|
||
title: str
|
||
payload: dict[str, Any]
|
||
status: str
|
||
response: dict[str, Any]
|
||
created_at: Any = None
|
||
|
||
model_config = {"from_attributes": True}
|
||
|
||
|
||
@approvals_router.get("", response_model=list[ApprovalOut])
|
||
async def list_approvals(
|
||
status: str = "pending",
|
||
run_id: str | None = None,
|
||
session: AsyncSession = Depends(get_session),
|
||
) -> list[Approval]:
|
||
stmt = select(Approval).order_by(Approval.created_at.desc()).limit(100)
|
||
if status != "all":
|
||
stmt = stmt.where(Approval.status == status)
|
||
if run_id:
|
||
stmt = stmt.where(Approval.run_id == run_id)
|
||
return list((await session.execute(stmt)).scalars())
|
||
|
||
|
||
class DecideIn(BaseModel):
|
||
approved: bool = True
|
||
note: str = ""
|
||
value: Any = None
|
||
args: dict[str, Any] | None = None
|
||
|
||
|
||
@approvals_router.post("/{approval_id}/decide", response_model=RunOut)
|
||
async def decide(
|
||
approval_id: str,
|
||
payload: DecideIn,
|
||
session: AsyncSession = Depends(get_session),
|
||
x_actor: str | None = Header(default=None),
|
||
) -> Run:
|
||
approval = await session.get(Approval, approval_id)
|
||
if not approval:
|
||
raise HTTPException(404, "审批请求不存在")
|
||
if approval.status != "pending":
|
||
raise HTTPException(409, "该请求已经处理过了")
|
||
|
||
# 责任归属先落库再恢复执行——恢复失败也要留下"谁试图批的"
|
||
approval.resolved_by = (x_actor or "").strip() or None
|
||
await session.commit()
|
||
|
||
response: dict[str, Any] = {"approved": payload.approved, "note": payload.note}
|
||
if payload.value is not None:
|
||
response["value"] = payload.value
|
||
if payload.args is not None:
|
||
response["args"] = payload.args
|
||
|
||
try:
|
||
return await run_manager.resume(
|
||
approval.run_id, response,
|
||
approval_id=approval.id,
|
||
actor=approval.resolved_by,
|
||
)
|
||
except ValueError as e:
|
||
raise HTTPException(409, str(e)) from e
|
||
|
||
|
||
def _jsonable(value: Any) -> Any:
|
||
if isinstance(value, dict):
|
||
return {str(k): _jsonable(v) for k, v in value.items()}
|
||
if isinstance(value, (list, tuple)):
|
||
return [_jsonable(v) for v in value]
|
||
if isinstance(value, (str, int, float, bool)) or value is None:
|
||
return value
|
||
return str(value)
|