def _getUser(tx, user_id):
query = (
'MATCH (u:User) '
'WHERE u.user_id = $user_id '
return tx.run(query, user_id=user_id)
Here is my transaction function, the whole code is too many pages to post. Was wondering why this is not returning anything in result (e.g. result.single() == None).
I am sending it using session.read_transaction(self._getUser, user_id)
This is something I can't really debug without being a Neo4j driver author.
Solution is to try a different driver. I'll try py2neo driver.
Update your driver if not
Make sure your parameter type fits with the one in your database.
Make sure you are properly using the result function
I encountered the same issue in Python, all queries returning empty results, however in my case it was a simple object lifetime issue. The official neo4j driver works fine.
This occurred after updating from version 1.7.6 to 4.x.x
What I did was returning a result within the
driver = GraphDatabase.driver(...)
with driver.session() as session:
On exiting the
with, it closes the session, and the results are no longer accessible. Interestingly there is a difference in behaviour of the python driver between old (pre 4) and new versions.