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Merge branch 'main' into neo4j-add-min-degree

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yangdx
2025-03-10 02:13:49 +08:00
parent 4065a7df92 32a7d40650
commit adca27fae9
14 changed files with 586 additions and 91 deletions
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lightrag/lightrag.py
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@@ -1976,6 +1976,9 @@ class LightRAG:
# Delete old entity record from vector database
old_entity_id = compute_mdhash_id(entity_name, prefix="ent-")
await self.entities_vdb.delete([old_entity_id])
logger.info(
f"Deleted old entity '{entity_name}' and its vector embedding from database"
)
# Update relationship vector representations
for src, tgt, edge_data in relations_to_update:
@@ -2103,6 +2106,15 @@ class LightRAG:
f"Relation from '{source_entity}' to '{target_entity}' does not exist"
)
# Important: First delete the old relation record from the vector database
old_relation_id = compute_mdhash_id(
source_entity + target_entity, prefix="rel-"
)
await self.relationships_vdb.delete([old_relation_id])
logger.info(
f"Deleted old relation record from vector database for relation {source_entity} -> {target_entity}"
)
# 2. Update relation information in the graph
new_edge_data = {**edge_data, **updated_data}
await self.chunk_entity_relation_graph.upsert_edge(
@@ -2601,12 +2613,29 @@ class LightRAG:
# 9. Delete source entities
for entity_name in source_entities:
# Delete entity node
# Delete entity node from knowledge graph
await self.chunk_entity_relation_graph.delete_node(entity_name)
# Delete record from vector database
# Delete entity record from vector database
entity_id = compute_mdhash_id(entity_name, prefix="ent-")
await self.entities_vdb.delete([entity_id])
logger.info(f"Deleted source entity '{entity_name}'")
# Also ensure any relationships specific to this entity are deleted from vector DB
# This is a safety check, as these should have been transformed to the target entity already
entity_relation_prefix = compute_mdhash_id(entity_name, prefix="rel-")
relations_with_entity = await self.relationships_vdb.search_by_prefix(
entity_relation_prefix
)
if relations_with_entity:
relation_ids = [r["id"] for r in relations_with_entity]
await self.relationships_vdb.delete(relation_ids)
logger.info(
f"Deleted {len(relation_ids)} relation records for entity '{entity_name}' from vector database"
)
logger.info(
f"Deleted source entity '{entity_name}' and its vector embedding from database"
)
# 10. Save changes
await self._merge_entities_done()