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ThearchyHelios
2df591d05f
事件流里的输出是给画布看的截断预览，出具溯源需要完整证据。 新增 data/artifacts/ 内容寻址工件库（sha256 即地址，取回时复验哈希， 篡改即报错）；节点完整输出与工具调用快照（query+结果集）自动落盘， 事件只携带工件 id。运行终态对全部事件计算清单哈希存入 Run， 事后对事件流的增删改会与它对不上。 graph_hash 剔除 viewport 后计算——挪画布不改变图的身份。 Run/Workflow/WorkflowVersion/Approval 预置分级与治理列， init_db 附带 SQLite 轻量列迁移。
96 lines
3.2 KiB
Python
96 lines
3.2 KiB
Python
from __future__ import annotations
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import uuid
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from datetime import datetime, timezone
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from typing import Any, AsyncIterator
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from sqlalchemy import JSON, DateTime, MetaData, event
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from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
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from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column
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from app.core.config import settings
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NAMING_CONVENTION = {
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"ix": "ix_%(column_0_label)s",
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"uq": "uq_%(table_name)s_%(column_0_name)s",
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"fk": "fk_%(table_name)s_%(column_0_name)s",
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"pk": "pk_%(table_name)s",
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}
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def utcnow() -> datetime:
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return datetime.now(timezone.utc)
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def new_id() -> str:
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return uuid.uuid4().hex
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class Base(DeclarativeBase):
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metadata = MetaData(naming_convention=NAMING_CONVENTION)
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# 图定义、节点配置、事件负载都是任意形状的 JSON，统一映射到 SQLite 的 JSON 列
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type_annotation_map = {dict[str, Any]: JSON, list[Any]: JSON}
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class TimestampMixin:
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created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=utcnow)
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updated_at: Mapped[datetime] = mapped_column(
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DateTime(timezone=True), default=utcnow, onupdate=utcnow
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)
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engine = create_async_engine(settings.db_url, echo=False, future=True)
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@event.listens_for(engine.sync_engine, "connect")
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def _set_sqlite_pragma(dbapi_conn, _record): # pragma: no cover - 驱动回调
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"""WAL + 外键约束。WAL 让读写不互相阻塞，事件写入和前端轮询能并行。"""
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cur = dbapi_conn.cursor()
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cur.execute("PRAGMA journal_mode=WAL")
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cur.execute("PRAGMA foreign_keys=ON")
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cur.execute("PRAGMA busy_timeout=5000")
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cur.close()
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SessionLocal = async_sessionmaker(engine, expire_on_commit=False, class_=AsyncSession)
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async def get_session() -> AsyncIterator[AsyncSession]:
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"""FastAPI 依赖注入用的会话。"""
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async with SessionLocal() as session:
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yield session
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# 轻量迁移：create_all 只建新表，不给已有表加列。SQLite 的 ADD COLUMN
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# 便宜且带默认值回填，够用；等真需要改列类型再考虑 alembic。
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_COLUMN_MIGRATIONS: list[tuple[str, str, str]] = [
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("runs", "run_class", "TEXT DEFAULT 'exploratory'"),
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("runs", "version", "INTEGER"),
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("runs", "version_hash", "VARCHAR(64)"),
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("runs", "manifest_hash", "VARCHAR(64)"),
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("runs", "started_by", "VARCHAR(100)"),
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("workflows", "status", "TEXT DEFAULT 'draft'"),
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("workflows", "published_version", "INTEGER"),
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("workflows", "published_by", "VARCHAR(100)"),
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("workflow_versions", "graph_hash", "VARCHAR(64)"),
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("approvals", "resolved_by", "VARCHAR(100)"),
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]
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def _migrate(conn) -> None: # pragma: no cover - 同步回调
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from sqlalchemy import text
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for table, column, ddl in _COLUMN_MIGRATIONS:
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cols = {row[1] for row in conn.execute(text(f"PRAGMA table_info({table})"))}
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if cols and column not in cols:
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conn.execute(text(f"ALTER TABLE {table} ADD COLUMN {column} {ddl}"))
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async def init_db() -> None:
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from app.db import models # noqa: F401 确保模型已注册到 metadata
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async with engine.begin() as conn:
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await conn.run_sync(Base.metadata.create_all)
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await conn.run_sync(_migrate)
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