yxxandClaude
6cf531f2a8
- 元数据 + 向量单事务提交，避免 PATCH 半提交（审阅 #2） - vectorstore upsert 改 delete-then-insert 幂等，支持共享 conn - FTS 取全量 + 过滤 oversample，修复 metadata 过滤漏召回（审阅 #4） - PATCH tags 区分 None/[]/非空：保留/清空/替换（审阅 #5） - rebuild 拒绝增量 scope/note_ids，扫描先行 + 失败回滚旧索引（审阅 #6） Co-Authored-By: Claude <noreply@anthropic.com>
100 lines
3.8 KiB
Python
100 lines
3.8 KiB
Python
"""索引服务：扫描 Vault、全量重建索引、查询索引状态。
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MVP 阶段重建是同步的（数据量小），完成后直接返回 completed 的 IndexJob。
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索引任务暂存内存（_jobs），不持久化到 SQLite；后续接入异步任务队列时再落到 index_jobs 表。
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"""
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from __future__ import annotations
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import shutil
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from datetime import datetime, timezone
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from pathlib import Path
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from uuid import uuid4
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from app import repository
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from app.config import get_settings
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from app.contracts import IndexJob, IndexRebuildRequest, IndexStatus
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from app.errors import ApiError
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from app.knowledge.parser import parse_note
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from app.services.note_service import index_note
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from app.retrieval.vectorstore import SqliteVecStore
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vector_store = SqliteVecStore()
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_jobs: dict[str, IndexJob] = {}
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def _scan_vault() -> list[tuple[str, str, str, datetime, datetime]]:
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"""扫描 Vault 下所有 Markdown，返回 (rel_path, folder, markdown, created, updated)。
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先读入内存：若文件读取失败，rebuild 尚未清空旧索引，不会造成数据损失。
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"""
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vault = get_settings().vault_path
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result: list[tuple[str, str, str, datetime, datetime]] = []
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if not vault.exists():
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return result
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for path in sorted(vault.rglob("*.md")):
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rel = path.relative_to(vault).as_posix()
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folder = path.relative_to(vault).parent.as_posix()
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if folder == ".":
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folder = ""
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stat = path.stat()
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created = datetime.fromtimestamp(stat.st_ctime, tz=timezone.utc)
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updated = datetime.fromtimestamp(stat.st_mtime, tz=timezone.utc)
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result.append((rel, folder, path.read_text(encoding="utf-8"), created, updated))
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return result
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async def rebuild(request: IndexRebuildRequest) -> IndexJob:
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job_id = "job_" + uuid4().hex[:12]
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# 增量重建（scope != all 或指定 note_ids）尚未实现，明确拒绝而非静默全量重建
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if request.scope != "all" or request.note_ids:
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raise ApiError(
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400,
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"UNSUPPORTED_SCOPE",
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"only full rebuild (scope='all' with empty note_ids) is supported",
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{"scope": request.scope, "note_ids": request.note_ids},
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)
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# 先扫描到内存（失败不会清旧索引），再快照旧库用于失败回滚
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docs = _scan_vault()
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settings = get_settings()
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backup_path = settings.db_path.with_suffix(".db.bak") if settings.db_path.exists() else None
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if backup_path is not None:
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shutil.copy2(settings.db_path, backup_path)
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try:
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repository.clear_all()
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await vector_store.clear()
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for rel, folder, markdown, created, updated in docs:
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parsed = parse_note(
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markdown=markdown, file_path=rel, folder=folder, tags=None,
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created_at=created, updated_at=updated,
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)
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await index_note(parsed)
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except BaseException:
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# 重建失败：恢复旧索引，避免留下半成品；记录 failed 任务后向上抛
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if backup_path is not None and backup_path.exists():
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shutil.copy2(backup_path, settings.db_path)
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_jobs[job_id] = IndexJob(
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job_id=job_id, status="failed", scope=request.scope,
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created_at=datetime.now(timezone.utc),
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)
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raise
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finally:
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if backup_path is not None:
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backup_path.unlink(missing_ok=True)
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job = IndexJob(job_id=job_id, status="completed", scope=request.scope, created_at=datetime.now(timezone.utc))
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_jobs[job_id] = job
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return job
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def get_status() -> IndexStatus:
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# 同步重建、无排队任务，因此状态恒为 idle；实际索引规模可由 GET /api/notes 与搜索反映
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return IndexStatus(status="idle", pending_jobs=0)
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def get_job(job_id: str) -> IndexJob | None:
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return _jobs.get(job_id)
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