Unexpected Error Creating A Neo4jPropertyGraphStore

At a glance

A community member is experiencing an unexpected error when creating a Neo4jPropertyGraphStore. The error is related to a CypherTypeError and seems to be caused by an issue in the refresh_schema function. Community members have tried updating the llama-index-graph-stores-neo4j package to the latest version, but the issue persists. One community member has reached out to a Neo4j expert to create a pull request to address the problem, but the fix is still pending. There is no explicitly marked answer in the comments.

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dd1n0

Hi everyone,
I'm getting an unexpected error creating a Neo4jPropertyGraphStore.
Code:
global NEO4J_STORE
loop = asyncio.new_event_loop()
asyncio.set_event_loop(loop)
NEO4J_STORE = Neo4jPropertyGraphStore(
url=neo4j_url,
username=neo4j_user,
password=neo4j_password)
Error:
NEO4J_STORE = Neo4jPropertyGraphStore(
File "/usr/local/lib/python3.9/site-packages/llama_index/graph_stores/neo4j/neo4j_property_graph.py", line 169, in init
self.refresh_schema()
File "/usr/local/lib/python3.9/site-packages/llama_index/graph_stores/neo4j/neo4j_property_graph.py", line 270, in refresh_schema
enhanced_info = self.structured_query(enhanced_cypher)[0]["output"]
File "/usr/local/lib/python3.9/site-packages/llama_index/graph_stores/neo4j/neo4j_property_graph.py", line 588, in structured_query
full_result = [d.data() for d in result]
File "/usr/local/lib/python3.9/site-packages/llama_index/graph_stores/neo4j/neo4j_property_graph.py", line 588, in <listcomp>
full_result = [d.data() for d in result]
File "/usr/local/lib/python3.9/site-packages/neo4j/_sync/work/result.py", line 393, in iter
self._connection.fetch_message()
File "/usr/local/lib/python3.9/site-packages/neo4j/_sync/io/_common.py", line 184, in inner
func(*args, **kwargs)
File "/usr/local/lib/python3.9/site-packages/neo4j/_sync/io/_bolt.py", line 994, in fetch_message
res = self._process_message(tag, fields)
File "/usr/local/lib/python3.9/site-packages/neo4j/_sync/io/_bolt5.py", line 496, in _process_message
response.on_failure(summary_metadata or {})
File "/usr/local/lib/python3.9/site-packages/neo4j/_sync/io/_common.py", line 254, in on_failure
raise self._hydrate_error(metadata)
neo4j.exceptions.CypherTypeError: {code: Neo.ClientError.Statement.TypeError} {message: Expected a string value for substring, but got: 2024-01-01T00:00:00Z; consider converting it to a string with toString().}

12 comments

LLogan M

pip install -U llama-index-graph-stores-neo4j

dd1n0

Nope I do not have the newest verison. I have 0.3.1. I will try it, thanks!

dd1n0

Hi again, @Logan M . I previously resolved this issue, but unfortunately, it's come up again. I've checked for the latest versions of llama-index-graph-stores-neo4j (currently at 0.4.4) and updated llama-index-core to the newest version as well, but the error persists. Any ideas on what might be causing this?

LLogan M

I have no idea on this. I'm not a cypher/neo4j expert at all. I can try asking the neo4j guys and see if they get back to me.

If you are able to make a fix to the code, that might be faster.

LLogan M

I got Tomaz (neo4j guy) to make a PR 🙂

https://github.com/run-llama/llama_index/pull/17448#pullrequestreview-2534731097

GGB7

Is it possible to use the Neo4jPropertyGraphStore with neo4j db version <=4.5?

GGB7

Btw, I'm getting a similar error with llama-index-graph-stores-neo4j=0.4.5
@Logan M

Plain Text

CypherTypeError: {code: Neo.ClientError.Statement.TypeError} {message: Invalid input for function 'toString()': Expected a String, Number, Boolean, Temporal or Duration, got: 
StringArray

LLogan M

pretty sure this is already fixed, pip install -U llama-index-graph-stores-neo4j

GGB7

I just installed the latest version llama-index-graph-stores-neo4j=0.4.5 and compared the code of both files in my local machine and the fix PR you sent.

I think it's a different one

LLogan M

idk man, I'm not a neo4j expert 😅 feel free to make a PR. Whats the full traceback?

GGB7

will do that if I figure out what the fix is: )
Thanks for trying, I appended the traceback

LLogan M

ah yea, still an issue in the refresh_schema function

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Unexpected Error Creating A Neo4jPropertyGraphStore