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remove dynamic node labels and rel types, tested with neo4j v5.24 #70

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Merged
merged 1 commit into from
Jun 18, 2025
Merged

remove dynamic node labels and rel types, tested with neo4j v5.24 #70

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51 changes: 26 additions & 25 deletions servers/mcp-neo4j-memory/src/mcp_neo4j_memory/server.py
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Original file line number Diff line number Diff line change
Expand Up @@ -108,32 +108,32 @@ async def load_graph(self, filter_query="*"):
return KnowledgeGraph(entities=entities, relations=relations)

async def create_entities(self, entities: List[Entity]) -> List[Entity]:
query = """
UNWIND $entities as entity
MERGE (e:Memory { name: entity.name })
SET e += entity {.type, .observations}
SET e:$(entity.type)
"""

entities_data = [entity.model_dump() for entity in entities]
self.neo4j_driver.execute_query(query, {"entities": entities_data})
for entity in entities:
query = f"""
WITH $entity as entity
MERGE (e:Memory {{ name: entity.name }})
SET e += entity {{ .type, .observations }}
SET e:{entity.type}
"""
self.neo4j_driver.execute_query(query, {"entity": entity.model_dump()})

return entities

async def create_relations(self, relations: List[Relation]) -> List[Relation]:
for relation in relations:
query = """
UNWIND $relations as relation
query = f"""
WITH $relation as relation
MATCH (from:Memory),(to:Memory)
WHERE from.name = relation.source
AND to.name = relation.target
MERGE (from)-[r:$(relation.relationType)]->(to)
MERGE (from)-[r:{relation.relationType}]->(to)
"""

self.neo4j_driver.execute_query(
query,
{"relations": [relation.model_dump() for relation in relations]}
{"relation": relation.model_dump()}
)

return relations

async def add_observations(self, observations: List[ObservationAddition]) -> List[Dict[str, Any]]:
Expand Down Expand Up @@ -176,17 +176,18 @@ async def delete_observations(self, deletions: List[ObservationDeletion]) -> Non
)

async def delete_relations(self, relations: List[Relation]) -> None:
query = """
UNWIND $relations as relation
MATCH (source:Memory)-[r:$(relation.relationType)]->(target:Memory)
WHERE source.name = relation.source
AND target.name = relation.target
DELETE r
"""
self.neo4j_driver.execute_query(
query,
{"relations": [relation.model_dump() for relation in relations]}
)
for relation in relations:
query = f"""
WITH $relation as relation
MATCH (source:Memory)-[r:{relation.relationType}]->(target:Memory)
WHERE source.name = relation.source
AND target.name = relation.target
DELETE r
"""
self.neo4j_driver.execute_query(
query,
{"relation": relation.model_dump()}
)

async def read_graph(self) -> KnowledgeGraph:
return await self.load_graph()
Expand Down