78 lines
2.8 KiB
Python
78 lines
2.8 KiB
Python
"""
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Copyright 2025, Zep Software, Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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"""
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import logging
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from collections.abc import Coroutine
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from typing import Any
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from neo4j import AsyncGraphDatabase
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from typing_extensions import LiteralString
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from graphiti_core.driver.driver import GraphDriver, GraphDriverSession, GraphProvider
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logger = logging.getLogger(__name__)
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class MemgraphDriver(GraphDriver):
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provider = GraphProvider.MEMGRAPH
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def __init__(
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self, uri: str, user: str | None, password: str | None, database: str = 'memgraph'
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):
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super().__init__()
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self.client = AsyncGraphDatabase.driver(
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uri=uri,
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auth=(user or '', password or ''),
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)
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self._database = database
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async def execute_query(self, cypher_query_: LiteralString, **kwargs: Any) -> Any:
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"""
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Execute a Cypher query against Memgraph using implicit transactions.
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Returns a tuple of (records, summary, keys) for compatibility with the GraphDriver interface.
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"""
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# Extract parameters from kwargs
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params = kwargs.pop('params', None)
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if params is None:
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database = kwargs.pop('database_', self._database)
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kwargs.pop('parameters_', None)
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params = kwargs
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else:
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database = kwargs.pop('database_', self._database)
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kwargs.pop('parameters_', None)
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async with self.client.session(database=database) as session:
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try:
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result = await session.run(cypher_query_, params)
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keys = result.keys()
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records = [record async for record in result]
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summary = await result.consume()
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return (records, summary, keys)
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except Exception as e:
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logger.error(f'Error executing Memgraph query: {e}\n{cypher_query_}\n{params}')
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raise
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finally:
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await session.close()
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def session(self, database: str | None = None) -> GraphDriverSession:
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_database = database or self._database
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return self.client.session(database=_database) # type: ignore
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async def close(self) -> None:
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return await self.client.close()
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def delete_all_indexes(self) -> Coroutine[Any, Any, Any]:
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return self.client.execute_query('DROP ALL INDEXES')
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