from __future__ import annotations import time import asyncio from typing import Any, cast from .base import DeletionResult from .kg.shared_storage import get_graph_db_lock from .constants import GRAPH_FIELD_SEP from .utils import compute_mdhash_id, logger from .base import StorageNameSpace async def _persist_graph_updates( entities_vdb=None, relationships_vdb=None, chunk_entity_relation_graph=None, entity_chunks_storage=None, relation_chunks_storage=None, ) -> None: """Unified callback to persist updates after graph operations. Ensures all relevant storage instances are properly persisted after operations like delete, edit, create, or merge. Args: entities_vdb: Entity vector database storage (optional) relationships_vdb: Relationship vector database storage (optional) chunk_entity_relation_graph: Graph storage instance (optional) entity_chunks_storage: Entity-chunk tracking storage (optional) relation_chunks_storage: Relation-chunk tracking storage (optional) """ storages = [] # Collect all non-None storage instances if entities_vdb is not None: storages.append(entities_vdb) if relationships_vdb is not None: storages.append(relationships_vdb) if chunk_entity_relation_graph is not None: storages.append(chunk_entity_relation_graph) if entity_chunks_storage is not None: storages.append(entity_chunks_storage) if relation_chunks_storage is not None: storages.append(relation_chunks_storage) # Persist all storage instances in parallel if storages: await asyncio.gather( *[ cast(StorageNameSpace, storage_inst).index_done_callback() for storage_inst in storages # type: ignore ] ) async def adelete_by_entity( chunk_entity_relation_graph, entities_vdb, relationships_vdb, entity_name: str, entity_chunks_storage=None, relation_chunks_storage=None, ) -> DeletionResult: """Asynchronously delete an entity and all its relationships. Also cleans up entity_chunks_storage and relation_chunks_storage to remove chunk tracking. Args: chunk_entity_relation_graph: Graph storage instance entities_vdb: Vector database storage for entities relationships_vdb: Vector database storage for relationships entity_name: Name of the entity to delete entity_chunks_storage: Optional KV storage for tracking chunks that reference this entity relation_chunks_storage: Optional KV storage for tracking chunks that reference relations """ graph_db_lock = get_graph_db_lock(enable_logging=False) # Use graph database lock to ensure atomic graph and vector db operations async with graph_db_lock: try: # Check if the entity exists if not await chunk_entity_relation_graph.has_node(entity_name): logger.warning(f"Entity '{entity_name}' not found.") return DeletionResult( status="not_found", doc_id=entity_name, message=f"Entity '{entity_name}' not found.", status_code=404, ) # Retrieve related relationships before deleting the node edges = await chunk_entity_relation_graph.get_node_edges(entity_name) related_relations_count = len(edges) if edges else 0 # Clean up chunk tracking storages before deletion if entity_chunks_storage is not None: # Delete entity's entry from entity_chunks_storage await entity_chunks_storage.delete([entity_name]) logger.info( f"Entity Delete: removed chunk tracking for `{entity_name}`" ) if relation_chunks_storage is not None and edges: # Delete all related relationships from relation_chunks_storage from .utils import make_relation_chunk_key relation_keys_to_delete = [] for src, tgt in edges: # Normalize entity order for consistent key generation normalized_src, normalized_tgt = sorted([src, tgt]) storage_key = make_relation_chunk_key( normalized_src, normalized_tgt ) relation_keys_to_delete.append(storage_key) if relation_keys_to_delete: await relation_chunks_storage.delete(relation_keys_to_delete) logger.info( f"Entity Delete: removed chunk tracking for {len(relation_keys_to_delete)} relations" ) await entities_vdb.delete_entity(entity_name) await relationships_vdb.delete_entity_relation(entity_name) await chunk_entity_relation_graph.delete_node(entity_name) message = f"Entity Delete: remove '{entity_name}' and its {related_relations_count} relations" logger.info(message) await _persist_graph_updates( entities_vdb=entities_vdb, relationships_vdb=relationships_vdb, chunk_entity_relation_graph=chunk_entity_relation_graph, entity_chunks_storage=entity_chunks_storage, relation_chunks_storage=relation_chunks_storage, ) return DeletionResult( status="success", doc_id=entity_name, message=message, status_code=200, ) except Exception as e: error_message = f"Error while deleting entity '{entity_name}': {e}" logger.error(error_message) return DeletionResult( status="fail", doc_id=entity_name, message=error_message, status_code=500, ) async def adelete_by_relation( chunk_entity_relation_graph, relationships_vdb, source_entity: str, target_entity: str, relation_chunks_storage=None, ) -> DeletionResult: """Asynchronously delete a relation between two entities. Also cleans up relation_chunks_storage to remove chunk tracking. Args: chunk_entity_relation_graph: Graph storage instance relationships_vdb: Vector database storage for relationships source_entity: Name of the source entity target_entity: Name of the target entity relation_chunks_storage: Optional KV storage for tracking chunks that reference this relation """ relation_str = f"{source_entity} -> {target_entity}" graph_db_lock = get_graph_db_lock(enable_logging=False) # Use graph database lock to ensure atomic graph and vector db operations async with graph_db_lock: try: # Normalize entity order for undirected graph (ensures consistent key generation) if source_entity > target_entity: source_entity, target_entity = target_entity, source_entity # Check if the relation exists edge_exists = await chunk_entity_relation_graph.has_edge( source_entity, target_entity ) if not edge_exists: message = f"Relation from '{source_entity}' to '{target_entity}' does not exist" logger.warning(message) return DeletionResult( status="not_found", doc_id=relation_str, message=message, status_code=404, ) # Clean up chunk tracking storage before deletion if relation_chunks_storage is not None: from .utils import make_relation_chunk_key # Normalize entity order for consistent key generation normalized_src, normalized_tgt = sorted([source_entity, target_entity]) storage_key = make_relation_chunk_key(normalized_src, normalized_tgt) await relation_chunks_storage.delete([storage_key]) logger.info( f"Relation Delete: removed chunk tracking for `{source_entity}`~`{target_entity}`" ) # Delete relation from vector database rel_ids_to_delete = [ compute_mdhash_id(source_entity + target_entity, prefix="rel-"), compute_mdhash_id(target_entity + source_entity, prefix="rel-"), ] await relationships_vdb.delete(rel_ids_to_delete) # Delete relation from knowledge graph await chunk_entity_relation_graph.remove_edges( [(source_entity, target_entity)] ) message = f"Relation Delete: `{source_entity}`~`{target_entity}` deleted successfully" logger.info(message) await _persist_graph_updates( relationships_vdb=relationships_vdb, chunk_entity_relation_graph=chunk_entity_relation_graph, relation_chunks_storage=relation_chunks_storage, ) return DeletionResult( status="success", doc_id=relation_str, message=message, status_code=200, ) except Exception as e: error_message = f"Error while deleting relation from '{source_entity}' to '{target_entity}': {e}" logger.error(error_message) return DeletionResult( status="fail", doc_id=relation_str, message=error_message, status_code=500, ) async def aedit_entity( chunk_entity_relation_graph, entities_vdb, relationships_vdb, entity_name: str, updated_data: dict[str, str], allow_rename: bool = True, entity_chunks_storage=None, relation_chunks_storage=None, ) -> dict[str, Any]: """Asynchronously edit entity information. Updates entity information in the knowledge graph and re-embeds the entity in the vector database. Also synchronizes entity_chunks_storage and relation_chunks_storage to track chunk references. Args: chunk_entity_relation_graph: Graph storage instance entities_vdb: Vector database storage for entities relationships_vdb: Vector database storage for relationships entity_name: Name of the entity to edit updated_data: Dictionary containing updated attributes, e.g. {"description": "new description", "entity_type": "new type"} allow_rename: Whether to allow entity renaming, defaults to True entity_chunks_storage: Optional KV storage for tracking chunks that reference this entity relation_chunks_storage: Optional KV storage for tracking chunks that reference relations Returns: Dictionary containing updated entity information """ graph_db_lock = get_graph_db_lock(enable_logging=False) # Use graph database lock to ensure atomic graph and vector db operations async with graph_db_lock: try: # Save original entity name for chunk tracking updates original_entity_name = entity_name # 1. Get current entity information node_exists = await chunk_entity_relation_graph.has_node(entity_name) if not node_exists: raise ValueError(f"Entity '{entity_name}' does not exist") node_data = await chunk_entity_relation_graph.get_node(entity_name) # Check if entity is being renamed new_entity_name = updated_data.get("entity_name", entity_name) is_renaming = new_entity_name != entity_name # If renaming, check if new name already exists if is_renaming: if not allow_rename: raise ValueError( "Entity renaming is not allowed. Set allow_rename=True to enable this feature" ) existing_node = await chunk_entity_relation_graph.has_node( new_entity_name ) if existing_node: raise ValueError( f"Entity name '{new_entity_name}' already exists, cannot rename" ) # 2. Update entity information in the graph new_node_data = {**node_data, **updated_data} new_node_data["entity_id"] = new_entity_name if "entity_name" in new_node_data: del new_node_data[ "entity_name" ] # Node data should not contain entity_name field # If renaming entity if is_renaming: logger.info( f"Entity Edit: renaming `{entity_name}` to `{new_entity_name}`" ) # Create new entity await chunk_entity_relation_graph.upsert_node( new_entity_name, new_node_data ) # Store relationships that need to be updated relations_to_update = [] relations_to_delete = [] # Get all edges related to the original entity edges = await chunk_entity_relation_graph.get_node_edges(entity_name) if edges: # Recreate edges for the new entity for source, target in edges: edge_data = await chunk_entity_relation_graph.get_edge( source, target ) if edge_data: relations_to_delete.append( compute_mdhash_id(source + target, prefix="rel-") ) relations_to_delete.append( compute_mdhash_id(target + source, prefix="rel-") ) if source == entity_name: await chunk_entity_relation_graph.upsert_edge( new_entity_name, target, edge_data ) relations_to_update.append( (new_entity_name, target, edge_data) ) else: # target == entity_name await chunk_entity_relation_graph.upsert_edge( source, new_entity_name, edge_data ) relations_to_update.append( (source, new_entity_name, edge_data) ) # Delete old entity await chunk_entity_relation_graph.delete_node(entity_name) # Delete old entity record from vector database old_entity_id = compute_mdhash_id(entity_name, prefix="ent-") await entities_vdb.delete([old_entity_id]) # Delete old relation records from vector database await relationships_vdb.delete(relations_to_delete) # Update relationship vector representations for src, tgt, edge_data in relations_to_update: # Normalize entity order for consistent vector ID generation normalized_src, normalized_tgt = sorted([src, tgt]) description = edge_data.get("description", "") keywords = edge_data.get("keywords", "") source_id = edge_data.get("source_id", "") weight = float(edge_data.get("weight", 1.0)) # Create content using normalized order content = ( f"{normalized_src}\t{normalized_tgt}\n{keywords}\n{description}" ) # Calculate relationship ID using normalized order relation_id = compute_mdhash_id( normalized_src + normalized_tgt, prefix="rel-" ) # Prepare data for vector database update relation_data = { relation_id: { "content": content, "src_id": normalized_src, "tgt_id": normalized_tgt, "source_id": source_id, "description": description, "keywords": keywords, "weight": weight, } } # Update vector database await relationships_vdb.upsert(relation_data) # Update working entity name to new name entity_name = new_entity_name else: # If not renaming, directly update node data await chunk_entity_relation_graph.upsert_node( entity_name, new_node_data ) # 3. Recalculate entity's vector representation and update vector database description = new_node_data.get("description", "") source_id = new_node_data.get("source_id", "") entity_type = new_node_data.get("entity_type", "") content = entity_name + "\n" + description # Calculate entity ID entity_id = compute_mdhash_id(entity_name, prefix="ent-") # Prepare data for vector database update entity_data = { entity_id: { "content": content, "entity_name": entity_name, "source_id": source_id, "description": description, "entity_type": entity_type, } } # Update vector database await entities_vdb.upsert(entity_data) # 4. Update chunk tracking storages if entity_chunks_storage is not None or relation_chunks_storage is not None: from .utils import ( make_relation_chunk_key, compute_incremental_chunk_ids, ) # 4.1 Handle entity chunk tracking if entity_chunks_storage is not None: # Get storage key (use original name for renaming scenario) storage_key = original_entity_name if is_renaming else entity_name stored_data = await entity_chunks_storage.get_by_id(storage_key) has_stored_data = ( stored_data and isinstance(stored_data, dict) and stored_data.get("chunk_ids") ) # Get old and new source_id old_source_id = node_data.get("source_id", "") old_chunk_ids = [ cid for cid in old_source_id.split(GRAPH_FIELD_SEP) if cid ] new_source_id = new_node_data.get("source_id", "") new_chunk_ids = [ cid for cid in new_source_id.split(GRAPH_FIELD_SEP) if cid ] source_id_changed = set(new_chunk_ids) != set(old_chunk_ids) # Update if: source_id changed OR storage has no data if source_id_changed or not has_stored_data: # Get existing full chunk_ids from storage existing_full_chunk_ids = [] if has_stored_data: existing_full_chunk_ids = [ cid for cid in stored_data.get("chunk_ids", []) if cid ] # If no stored data exists, use old source_id as baseline if not existing_full_chunk_ids: existing_full_chunk_ids = old_chunk_ids.copy() # Use utility function to compute incremental updates updated_chunk_ids = compute_incremental_chunk_ids( existing_full_chunk_ids, old_chunk_ids, new_chunk_ids ) # Update storage (even if updated_chunk_ids is empty) if is_renaming: # Renaming: delete old + create new await entity_chunks_storage.delete([original_entity_name]) await entity_chunks_storage.upsert( { entity_name: { "chunk_ids": updated_chunk_ids, "count": len(updated_chunk_ids), } } ) else: # Non-renaming: direct update await entity_chunks_storage.upsert( { entity_name: { "chunk_ids": updated_chunk_ids, "count": len(updated_chunk_ids), } } ) logger.info( f"Entity Edit: find {len(updated_chunk_ids)} chunks related to `{entity_name}`" ) # 4.2 Handle relation chunk tracking if entity was renamed if ( is_renaming and relation_chunks_storage is not None and relations_to_update ): for src, tgt, edge_data in relations_to_update: # Determine old entity pair (before rename) old_src = original_entity_name if src == entity_name else src old_tgt = original_entity_name if tgt == entity_name else tgt # Normalize entity order for both old and new keys old_normalized_src, old_normalized_tgt = sorted( [old_src, old_tgt] ) new_normalized_src, new_normalized_tgt = sorted([src, tgt]) # Generate storage keys old_storage_key = make_relation_chunk_key( old_normalized_src, old_normalized_tgt ) new_storage_key = make_relation_chunk_key( new_normalized_src, new_normalized_tgt ) # If keys are different, we need to move the chunk tracking if old_storage_key != new_storage_key: # Get complete chunk IDs from storage first (preserves all existing references) old_stored_data = await relation_chunks_storage.get_by_id( old_storage_key ) relation_chunk_ids = [] if old_stored_data and isinstance(old_stored_data, dict): # Use complete chunk_ids from storage relation_chunk_ids = [ cid for cid in old_stored_data.get("chunk_ids", []) if cid ] else: # Fallback: if storage has no data, use graph's source_id relation_source_id = edge_data.get("source_id", "") relation_chunk_ids = [ cid for cid in relation_source_id.split(GRAPH_FIELD_SEP) if cid ] # Delete old relation chunk tracking await relation_chunks_storage.delete([old_storage_key]) # Create new relation chunk tracking (migrate complete data) if relation_chunk_ids: await relation_chunks_storage.upsert( { new_storage_key: { "chunk_ids": relation_chunk_ids, "count": len(relation_chunk_ids), } } ) logger.info( f"Entity Edit: migrate {len(relations_to_update)} relations after rename" ) # 5. Save changes await _persist_graph_updates( entities_vdb=entities_vdb, relationships_vdb=relationships_vdb, chunk_entity_relation_graph=chunk_entity_relation_graph, entity_chunks_storage=entity_chunks_storage, relation_chunks_storage=relation_chunks_storage, ) logger.info(f"Entity Edit: `{entity_name}` successfully updated") return await get_entity_info( chunk_entity_relation_graph, entities_vdb, entity_name, include_vector_data=True, ) except Exception as e: logger.error(f"Error while editing entity '{entity_name}': {e}") raise async def aedit_relation( chunk_entity_relation_graph, entities_vdb, relationships_vdb, source_entity: str, target_entity: str, updated_data: dict[str, Any], relation_chunks_storage=None, ) -> dict[str, Any]: """Asynchronously edit relation information. Updates relation (edge) information in the knowledge graph and re-embeds the relation in the vector database. Also synchronizes the relation_chunks_storage to track which chunks reference this relation. Args: chunk_entity_relation_graph: Graph storage instance entities_vdb: Vector database storage for entities relationships_vdb: Vector database storage for relationships source_entity: Name of the source entity target_entity: Name of the target entity updated_data: Dictionary containing updated attributes, e.g. {"description": "new description", "keywords": "new keywords"} relation_chunks_storage: Optional KV storage for tracking chunks that reference this relation Returns: Dictionary containing updated relation information """ graph_db_lock = get_graph_db_lock(enable_logging=False) # Use graph database lock to ensure atomic graph and vector db operations async with graph_db_lock: try: # Normalize entity order for undirected graph (ensures consistent key generation) if source_entity > target_entity: source_entity, target_entity = target_entity, source_entity # 1. Get current relation information edge_exists = await chunk_entity_relation_graph.has_edge( source_entity, target_entity ) if not edge_exists: raise ValueError( f"Relation from '{source_entity}' to '{target_entity}' does not exist" ) edge_data = await chunk_entity_relation_graph.get_edge( source_entity, target_entity ) # Important: First delete the old relation record from the vector database # Delete both permutations to handle relationships created before normalization rel_ids_to_delete = [ compute_mdhash_id(source_entity + target_entity, prefix="rel-"), compute_mdhash_id(target_entity + source_entity, prefix="rel-"), ] await relationships_vdb.delete(rel_ids_to_delete) logger.debug( f"Relation Delete: delete vdb for `{source_entity}`~`{target_entity}`" ) # 2. Update relation information in the graph new_edge_data = {**edge_data, **updated_data} await chunk_entity_relation_graph.upsert_edge( source_entity, target_entity, new_edge_data ) # 3. Recalculate relation's vector representation and update vector database description = new_edge_data.get("description", "") keywords = new_edge_data.get("keywords", "") source_id = new_edge_data.get("source_id", "") weight = float(new_edge_data.get("weight", 1.0)) # Create content for embedding content = f"{source_entity}\t{target_entity}\n{keywords}\n{description}" # Calculate relation ID relation_id = compute_mdhash_id( source_entity + target_entity, prefix="rel-" ) # Prepare data for vector database update relation_data = { relation_id: { "content": content, "src_id": source_entity, "tgt_id": target_entity, "source_id": source_id, "description": description, "keywords": keywords, "weight": weight, } } # Update vector database await relationships_vdb.upsert(relation_data) # 4. Update relation_chunks_storage in two scenarios: # - source_id has changed (edit scenario) # - relation_chunks_storage has no existing data (migration/initialization scenario) if relation_chunks_storage is not None: from .utils import ( make_relation_chunk_key, compute_incremental_chunk_ids, ) storage_key = make_relation_chunk_key(source_entity, target_entity) # Check if storage has existing data stored_data = await relation_chunks_storage.get_by_id(storage_key) has_stored_data = ( stored_data and isinstance(stored_data, dict) and stored_data.get("chunk_ids") ) # Get old and new source_id old_source_id = edge_data.get("source_id", "") old_chunk_ids = [ cid for cid in old_source_id.split(GRAPH_FIELD_SEP) if cid ] new_source_id = new_edge_data.get("source_id", "") new_chunk_ids = [ cid for cid in new_source_id.split(GRAPH_FIELD_SEP) if cid ] source_id_changed = set(new_chunk_ids) != set(old_chunk_ids) # Update if: source_id changed OR storage has no data if source_id_changed or not has_stored_data: # Get existing full chunk_ids from storage existing_full_chunk_ids = [] if has_stored_data: existing_full_chunk_ids = [ cid for cid in stored_data.get("chunk_ids", []) if cid ] # If no stored data exists, use old source_id as baseline if not existing_full_chunk_ids: existing_full_chunk_ids = old_chunk_ids.copy() # Use utility function to compute incremental updates updated_chunk_ids = compute_incremental_chunk_ids( existing_full_chunk_ids, old_chunk_ids, new_chunk_ids ) # Update storage (Update even if updated_chunk_ids is empty) await relation_chunks_storage.upsert( { storage_key: { "chunk_ids": updated_chunk_ids, "count": len(updated_chunk_ids), } } ) logger.info( f"Relation Delete: update chunk tracking for `{source_entity}`~`{target_entity}`" ) # 5. Save changes await _persist_graph_updates( relationships_vdb=relationships_vdb, chunk_entity_relation_graph=chunk_entity_relation_graph, relation_chunks_storage=relation_chunks_storage, ) logger.info( f"Relation Delete: `{source_entity}`~`{target_entity}`' successfully updated" ) return await get_relation_info( chunk_entity_relation_graph, relationships_vdb, source_entity, target_entity, include_vector_data=True, ) except Exception as e: logger.error( f"Error while editing relation from '{source_entity}' to '{target_entity}': {e}" ) raise async def acreate_entity( chunk_entity_relation_graph, entities_vdb, relationships_vdb, entity_name: str, entity_data: dict[str, Any], entity_chunks_storage=None, relation_chunks_storage=None, ) -> dict[str, Any]: """Asynchronously create a new entity. Creates a new entity in the knowledge graph and adds it to the vector database. Also synchronizes entity_chunks_storage to track chunk references. Args: chunk_entity_relation_graph: Graph storage instance entities_vdb: Vector database storage for entities relationships_vdb: Vector database storage for relationships entity_name: Name of the new entity entity_data: Dictionary containing entity attributes, e.g. {"description": "description", "entity_type": "type"} entity_chunks_storage: Optional KV storage for tracking chunks that reference this entity relation_chunks_storage: Optional KV storage for tracking chunks that reference relations Returns: Dictionary containing created entity information """ graph_db_lock = get_graph_db_lock(enable_logging=False) # Use graph database lock to ensure atomic graph and vector db operations async with graph_db_lock: try: # Check if entity already exists existing_node = await chunk_entity_relation_graph.has_node(entity_name) if existing_node: raise ValueError(f"Entity '{entity_name}' already exists") # Prepare node data with defaults if missing node_data = { "entity_id": entity_name, "entity_type": entity_data.get("entity_type", "UNKNOWN"), "description": entity_data.get("description", ""), "source_id": entity_data.get("source_id", "manual_creation"), "file_path": entity_data.get("file_path", "manual_creation"), "created_at": int(time.time()), } # Add entity to knowledge graph await chunk_entity_relation_graph.upsert_node(entity_name, node_data) # Prepare content for entity description = node_data.get("description", "") source_id = node_data.get("source_id", "") entity_type = node_data.get("entity_type", "") content = entity_name + "\n" + description # Calculate entity ID entity_id = compute_mdhash_id(entity_name, prefix="ent-") # Prepare data for vector database update entity_data_for_vdb = { entity_id: { "content": content, "entity_name": entity_name, "source_id": source_id, "description": description, "entity_type": entity_type, "file_path": entity_data.get("file_path", "manual_creation"), } } # Update vector database await entities_vdb.upsert(entity_data_for_vdb) # Update entity_chunks_storage to track chunk references if entity_chunks_storage is not None: source_id = node_data.get("source_id", "") chunk_ids = [cid for cid in source_id.split(GRAPH_FIELD_SEP) if cid] if chunk_ids: await entity_chunks_storage.upsert( { entity_name: { "chunk_ids": chunk_ids, "count": len(chunk_ids), } } ) logger.info( f"Entity Create: tracked {len(chunk_ids)} chunks for `{entity_name}`" ) # Save changes await _persist_graph_updates( entities_vdb=entities_vdb, relationships_vdb=relationships_vdb, chunk_entity_relation_graph=chunk_entity_relation_graph, entity_chunks_storage=entity_chunks_storage, relation_chunks_storage=relation_chunks_storage, ) logger.info(f"Entity Create: '{entity_name}' successfully created") return await get_entity_info( chunk_entity_relation_graph, entities_vdb, entity_name, include_vector_data=True, ) except Exception as e: logger.error(f"Error while creating entity '{entity_name}': {e}") raise async def acreate_relation( chunk_entity_relation_graph, entities_vdb, relationships_vdb, source_entity: str, target_entity: str, relation_data: dict[str, Any], relation_chunks_storage=None, ) -> dict[str, Any]: """Asynchronously create a new relation between entities. Creates a new relation (edge) in the knowledge graph and adds it to the vector database. Also synchronizes relation_chunks_storage to track chunk references. Args: chunk_entity_relation_graph: Graph storage instance entities_vdb: Vector database storage for entities relationships_vdb: Vector database storage for relationships source_entity: Name of the source entity target_entity: Name of the target entity relation_data: Dictionary containing relation attributes, e.g. {"description": "description", "keywords": "keywords"} relation_chunks_storage: Optional KV storage for tracking chunks that reference this relation Returns: Dictionary containing created relation information """ graph_db_lock = get_graph_db_lock(enable_logging=False) # Use graph database lock to ensure atomic graph and vector db operations async with graph_db_lock: try: # Check if both entities exist source_exists = await chunk_entity_relation_graph.has_node(source_entity) target_exists = await chunk_entity_relation_graph.has_node(target_entity) if not source_exists: raise ValueError(f"Source entity '{source_entity}' does not exist") if not target_exists: raise ValueError(f"Target entity '{target_entity}' does not exist") # Check if relation already exists existing_edge = await chunk_entity_relation_graph.has_edge( source_entity, target_entity ) if existing_edge: raise ValueError( f"Relation from '{source_entity}' to '{target_entity}' already exists" ) # Prepare edge data with defaults if missing edge_data = { "description": relation_data.get("description", ""), "keywords": relation_data.get("keywords", ""), "source_id": relation_data.get("source_id", "manual_creation"), "weight": float(relation_data.get("weight", 1.0)), "file_path": relation_data.get("file_path", "manual_creation"), "created_at": int(time.time()), } # Add relation to knowledge graph await chunk_entity_relation_graph.upsert_edge( source_entity, target_entity, edge_data ) # Normalize entity order for undirected relation vector (ensures consistent key generation) if source_entity > target_entity: source_entity, target_entity = target_entity, source_entity # Prepare content for embedding description = edge_data.get("description", "") keywords = edge_data.get("keywords", "") source_id = edge_data.get("source_id", "") weight = edge_data.get("weight", 1.0) # Create content for embedding content = f"{keywords}\t{source_entity}\n{target_entity}\n{description}" # Calculate relation ID relation_id = compute_mdhash_id( source_entity + target_entity, prefix="rel-" ) # Prepare data for vector database update relation_data_for_vdb = { relation_id: { "content": content, "src_id": source_entity, "tgt_id": target_entity, "source_id": source_id, "description": description, "keywords": keywords, "weight": weight, "file_path": relation_data.get("file_path", "manual_creation"), } } # Update vector database await relationships_vdb.upsert(relation_data_for_vdb) # Update relation_chunks_storage to track chunk references if relation_chunks_storage is not None: from .utils import make_relation_chunk_key # Normalize entity order for consistent key generation normalized_src, normalized_tgt = sorted([source_entity, target_entity]) storage_key = make_relation_chunk_key(normalized_src, normalized_tgt) source_id = edge_data.get("source_id", "") chunk_ids = [cid for cid in source_id.split(GRAPH_FIELD_SEP) if cid] if chunk_ids: await relation_chunks_storage.upsert( { storage_key: { "chunk_ids": chunk_ids, "count": len(chunk_ids), } } ) logger.info( f"Relation Create: tracked {len(chunk_ids)} chunks for `{source_entity}`~`{target_entity}`" ) # Save changes await _persist_graph_updates( relationships_vdb=relationships_vdb, chunk_entity_relation_graph=chunk_entity_relation_graph, relation_chunks_storage=relation_chunks_storage, ) logger.info( f"Relation Create: `{source_entity}`~`{target_entity}` successfully created" ) return await get_relation_info( chunk_entity_relation_graph, relationships_vdb, source_entity, target_entity, include_vector_data=True, ) except Exception as e: logger.error( f"Error while creating relation from '{source_entity}' to '{target_entity}': {e}" ) raise async def amerge_entities( chunk_entity_relation_graph, entities_vdb, relationships_vdb, source_entities: list[str], target_entity: str, merge_strategy: dict[str, str] = None, target_entity_data: dict[str, Any] = None, ) -> dict[str, Any]: """Asynchronously merge multiple entities into one entity. Merges multiple source entities into a target entity, handling all relationships, and updating both the knowledge graph and vector database. Args: chunk_entity_relation_graph: Graph storage instance entities_vdb: Vector database storage for entities relationships_vdb: Vector database storage for relationships source_entities: List of source entity names to merge target_entity: Name of the target entity after merging merge_strategy: Merge strategy configuration, e.g. {"description": "concatenate", "entity_type": "keep_first"} Supported strategies: - "concatenate": Concatenate all values (for text fields) - "keep_first": Keep the first non-empty value - "keep_last": Keep the last non-empty value - "join_unique": Join all unique values (for fields separated by delimiter) target_entity_data: Dictionary of specific values to set for the target entity, overriding any merged values, e.g. {"description": "custom description", "entity_type": "PERSON"} Returns: Dictionary containing the merged entity information """ graph_db_lock = get_graph_db_lock(enable_logging=False) # Use graph database lock to ensure atomic graph and vector db operations async with graph_db_lock: try: # Default merge strategy default_strategy = { "description": "concatenate", "entity_type": "keep_first", "source_id": "join_unique", } merge_strategy = ( default_strategy if merge_strategy is None else {**default_strategy, **merge_strategy} ) target_entity_data = ( {} if target_entity_data is None else target_entity_data ) # 1. Check if all source entities exist source_entities_data = {} for entity_name in source_entities: node_exists = await chunk_entity_relation_graph.has_node(entity_name) if not node_exists: raise ValueError(f"Source entity '{entity_name}' does not exist") node_data = await chunk_entity_relation_graph.get_node(entity_name) source_entities_data[entity_name] = node_data # 2. Check if target entity exists and get its data if it does target_exists = await chunk_entity_relation_graph.has_node(target_entity) existing_target_entity_data = {} if target_exists: existing_target_entity_data = ( await chunk_entity_relation_graph.get_node(target_entity) ) logger.info( f"Target entity '{target_entity}' already exists, will merge data" ) # 3. Merge entity data merged_entity_data = _merge_entity_attributes( list(source_entities_data.values()) + ([existing_target_entity_data] if target_exists else []), merge_strategy, ) # Apply any explicitly provided target entity data (overrides merged data) for key, value in target_entity_data.items(): merged_entity_data[key] = value # 4. Get all relationships of the source entities and target entity (if exists) all_relations = [] entities_to_collect = source_entities.copy() # If target entity exists, also collect its relationships for merging if target_exists: entities_to_collect.append(target_entity) for entity_name in entities_to_collect: # Get all relationships of the entities edges = await chunk_entity_relation_graph.get_node_edges(entity_name) if edges: for src, tgt in edges: # Ensure src is the current entity if src == entity_name: edge_data = await chunk_entity_relation_graph.get_edge( src, tgt ) all_relations.append((src, tgt, edge_data)) # 5. Create or update the target entity merged_entity_data["entity_id"] = target_entity if not target_exists: await chunk_entity_relation_graph.upsert_node( target_entity, merged_entity_data ) logger.info(f"Created new target entity '{target_entity}'") else: await chunk_entity_relation_graph.upsert_node( target_entity, merged_entity_data ) logger.info(f"Updated existing target entity '{target_entity}'") # 6. Recreate all relationships, pointing to the target entity relation_updates = {} # Track relationships that need to be merged relations_to_delete = [] for src, tgt, edge_data in all_relations: relations_to_delete.append(compute_mdhash_id(src + tgt, prefix="rel-")) relations_to_delete.append(compute_mdhash_id(tgt + src, prefix="rel-")) new_src = target_entity if src in source_entities else src new_tgt = target_entity if tgt in source_entities else tgt # Skip relationships between source entities to avoid self-loops if new_src == new_tgt: logger.info( f"Skipping relationship between source entities: {src} -> {tgt} to avoid self-loop" ) continue # Check if the same relationship already exists relation_key = f"{new_src}|{new_tgt}" if relation_key in relation_updates: # Merge relationship data existing_data = relation_updates[relation_key]["data"] merged_relation = _merge_relation_attributes( [existing_data, edge_data], { "description": "concatenate", "keywords": "join_unique", "source_id": "join_unique", "weight": "max", }, ) relation_updates[relation_key]["data"] = merged_relation logger.info( f"Merged duplicate relationship: {new_src} -> {new_tgt}" ) else: relation_updates[relation_key] = { "src": new_src, "tgt": new_tgt, "data": edge_data.copy(), } # Apply relationship updates for rel_data in relation_updates.values(): await chunk_entity_relation_graph.upsert_edge( rel_data["src"], rel_data["tgt"], rel_data["data"] ) logger.info( f"Created or updated relationship: {rel_data['src']} -> {rel_data['tgt']}" ) # Delete relationships records from vector database await relationships_vdb.delete(relations_to_delete) logger.info( f"Deleted {len(relations_to_delete)} relation records for entity from vector database" ) # 7. Update entity vector representation description = merged_entity_data.get("description", "") source_id = merged_entity_data.get("source_id", "") entity_type = merged_entity_data.get("entity_type", "") content = target_entity + "\n" + description entity_id = compute_mdhash_id(target_entity, prefix="ent-") entity_data_for_vdb = { entity_id: { "content": content, "entity_name": target_entity, "source_id": source_id, "description": description, "entity_type": entity_type, } } await entities_vdb.upsert(entity_data_for_vdb) # 8. Update relationship vector representations for rel_data in relation_updates.values(): src = rel_data["src"] tgt = rel_data["tgt"] edge_data = rel_data["data"] # Normalize entity order for consistent vector storage normalized_src, normalized_tgt = sorted([src, tgt]) description = edge_data.get("description", "") keywords = edge_data.get("keywords", "") source_id = edge_data.get("source_id", "") weight = float(edge_data.get("weight", 1.0)) # Use normalized order for content and relation ID content = ( f"{keywords}\t{normalized_src}\n{normalized_tgt}\n{description}" ) relation_id = compute_mdhash_id( normalized_src + normalized_tgt, prefix="rel-" ) relation_data_for_vdb = { relation_id: { "content": content, "src_id": normalized_src, "tgt_id": normalized_tgt, "source_id": source_id, "description": description, "keywords": keywords, "weight": weight, } } await relationships_vdb.upsert(relation_data_for_vdb) # 9. Delete source entities for entity_name in source_entities: if entity_name == target_entity: logger.info( f"Skipping deletion of '{entity_name}' as it's also the target entity" ) continue # Delete entity node from knowledge graph await chunk_entity_relation_graph.delete_node(entity_name) # Delete entity record from vector database entity_id = compute_mdhash_id(entity_name, prefix="ent-") await entities_vdb.delete([entity_id]) logger.info( f"Deleted source entity '{entity_name}' and its vector embedding from database" ) # 10. Save changes await _persist_graph_updates( entities_vdb=entities_vdb, relationships_vdb=relationships_vdb, chunk_entity_relation_graph=chunk_entity_relation_graph, ) logger.info( f"Successfully merged {len(source_entities)} entities into '{target_entity}'" ) return await get_entity_info( chunk_entity_relation_graph, entities_vdb, target_entity, include_vector_data=True, ) except Exception as e: logger.error(f"Error merging entities: {e}") raise def _merge_entity_attributes( entity_data_list: list[dict[str, Any]], merge_strategy: dict[str, str] ) -> dict[str, Any]: """Merge attributes from multiple entities. Args: entity_data_list: List of dictionaries containing entity data merge_strategy: Merge strategy for each field Returns: Dictionary containing merged entity data """ merged_data = {} # Collect all possible keys all_keys = set() for data in entity_data_list: all_keys.update(data.keys()) # Merge values for each key for key in all_keys: # Get all values for this key values = [data.get(key) for data in entity_data_list if data.get(key)] if not values: continue # Merge values according to strategy strategy = merge_strategy.get(key, "keep_first") if strategy == "concatenate": merged_data[key] = "\n\n".join(values) elif strategy == "keep_first": merged_data[key] = values[0] elif strategy == "keep_last": merged_data[key] = values[-1] elif strategy == "join_unique": # Handle fields separated by GRAPH_FIELD_SEP unique_items = set() for value in values: items = value.split(GRAPH_FIELD_SEP) unique_items.update(items) merged_data[key] = GRAPH_FIELD_SEP.join(unique_items) else: # Default strategy merged_data[key] = values[0] return merged_data def _merge_relation_attributes( relation_data_list: list[dict[str, Any]], merge_strategy: dict[str, str] ) -> dict[str, Any]: """Merge attributes from multiple relationships. Args: relation_data_list: List of dictionaries containing relationship data merge_strategy: Merge strategy for each field Returns: Dictionary containing merged relationship data """ merged_data = {} # Collect all possible keys all_keys = set() for data in relation_data_list: all_keys.update(data.keys()) # Merge values for each key for key in all_keys: # Get all values for this key values = [ data.get(key) for data in relation_data_list if data.get(key) is not None ] if not values: continue # Merge values according to strategy strategy = merge_strategy.get(key, "keep_first") if strategy == "concatenate": merged_data[key] = "\n\n".join(str(v) for v in values) elif strategy == "keep_first": merged_data[key] = values[0] elif strategy == "keep_last": merged_data[key] = values[-1] elif strategy == "join_unique": # Handle fields separated by GRAPH_FIELD_SEP unique_items = set() for value in values: items = str(value).split(GRAPH_FIELD_SEP) unique_items.update(items) merged_data[key] = GRAPH_FIELD_SEP.join(unique_items) elif strategy == "max": # For numeric fields like weight try: merged_data[key] = max(float(v) for v in values) except (ValueError, TypeError): merged_data[key] = values[0] else: # Default strategy merged_data[key] = values[0] return merged_data async def get_entity_info( chunk_entity_relation_graph, entities_vdb, entity_name: str, include_vector_data: bool = False, ) -> dict[str, str | None | dict[str, str]]: """Get detailed information of an entity""" # Get information from the graph node_data = await chunk_entity_relation_graph.get_node(entity_name) source_id = node_data.get("source_id") if node_data else None result: dict[str, str | None | dict[str, str]] = { "entity_name": entity_name, "source_id": source_id, "graph_data": node_data, } # Optional: Get vector database information if include_vector_data: entity_id = compute_mdhash_id(entity_name, prefix="ent-") vector_data = await entities_vdb.get_by_id(entity_id) result["vector_data"] = vector_data return result async def get_relation_info( chunk_entity_relation_graph, relationships_vdb, src_entity: str, tgt_entity: str, include_vector_data: bool = False, ) -> dict[str, str | None | dict[str, str]]: """ Get detailed information of a relationship between two entities. Relationship is unidirectional, swap src_entity and tgt_entity does not change the relationship. Args: src_entity: Source entity name tgt_entity: Target entity name include_vector_data: Whether to include vector database information Returns: Dictionary containing relationship information """ # Get information from the graph edge_data = await chunk_entity_relation_graph.get_edge(src_entity, tgt_entity) source_id = edge_data.get("source_id") if edge_data else None result: dict[str, str | None | dict[str, str]] = { "src_entity": src_entity, "tgt_entity": tgt_entity, "source_id": source_id, "graph_data": edge_data, } # Optional: Get vector database information if include_vector_data: rel_id = compute_mdhash_id(src_entity + tgt_entity, prefix="rel-") vector_data = await relationships_vdb.get_by_id(rel_id) result["vector_data"] = vector_data return result