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Fix: whole knowledge graph lost after removing any document in the knowledge base (#7151)

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### What problem does this PR solve?

When you removed any document in a knowledge base using knowledge graph,
the graph's `removed_kwd` is set to "Y".
However, in the function `graphrag.utils.get_gaph`, `rebuild_graph`
method is passed and directly return `None` while `removed_kwd=Y`,
making residual part of the graph abandoned (but old entity data still
exist in db).

Besides, infinity instance actually pass deleting graph components'
`source_id` when removing document. It may cause wrong graph after
rebuild.

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)
This commit is contained in:
alkscr
2025-04-30 09:43:17 +08:00
committed by GitHub
parent 538a408608
commit ab27609a64
4 changed files with 137 additions and 70 deletions
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21
api/db/services/document_service.py
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@ -37,6 +37,7 @@ from rag.nlp import rag_tokenizer, search
from rag.settings import get_svr_queue_name
from rag.utils.redis_conn import REDIS_CONN
from rag.utils.storage_factory import STORAGE_IMPL
from rag.utils.doc_store_conn import OrderByExpr
class DocumentService(CommonService):
@ -111,14 +112,18 @@ class DocumentService(CommonService):
cls.clear_chunk_num(doc.id)
try:
settings.docStoreConn.delete({"doc_id": doc.id}, search.index_name(tenant_id), doc.kb_id)
settings.docStoreConn.update({"kb_id": doc.kb_id, "knowledge_graph_kwd": ["entity", "relation", "graph", "subgraph", "community_report"], "source_id": doc.id},
{"remove": {"source_id": doc.id}},
search.index_name(tenant_id), doc.kb_id)
settings.docStoreConn.update({"kb_id": doc.kb_id, "knowledge_graph_kwd": ["graph"]},
{"removed_kwd": "Y"},
search.index_name(tenant_id), doc.kb_id)
settings.docStoreConn.delete({"kb_id": doc.kb_id, "knowledge_graph_kwd": ["entity", "relation", "graph", "subgraph", "community_report"], "must_not": {"exists": "source_id"}},
search.index_name(tenant_id), doc.kb_id)
graph_source = settings.docStoreConn.getFields(
settings.docStoreConn.search(["source_id"], [], {"kb_id": doc.kb_id, "knowledge_graph_kwd": ["graph"]}, [], OrderByExpr(), 0, 1, search.index_name(tenant_id), [doc.kb_id]), ["source_id"]
)
if len(graph_source) > 0 and doc.id in list(graph_source.values())[0]["source_id"]:
settings.docStoreConn.update({"kb_id": doc.kb_id, "knowledge_graph_kwd": ["entity", "relation", "graph", "subgraph", "community_report"], "source_id": doc.id},
{"remove": {"source_id": doc.id}},
search.index_name(tenant_id), doc.kb_id)
settings.docStoreConn.update({"kb_id": doc.kb_id, "knowledge_graph_kwd": ["graph"]},
{"removed_kwd": "Y"},
search.index_name(tenant_id), doc.kb_id)
settings.docStoreConn.delete({"kb_id": doc.kb_id, "knowledge_graph_kwd": ["entity", "relation", "graph", "subgraph", "community_report"], "must_not": {"exists": "source_id"}},
search.index_name(tenant_id), doc.kb_id)
except Exception:
pass
return cls.delete_by_id(doc.id)