After upgrading py2neo version code is giving errors

Question

Currently production in use versions.

NEO4J==3.2.2

python3.8 py2neo==3.1.2

Now upgrading towards newer version

py2neo==4.2.0

I am facing errors.

with py2neo==3.1.2 this code was working fine

selector = NodeSelector(graph)
student_node = selector.select("school", studen_key=studen_key).first()

After upgrading the version I have updated the code like this

selector = NodeMatcher(graph)
student_node = selector.match("school", studen_key=studen_key).first()

but it is throwing errors.

py2neo.database.ClientError: SyntaxError: Invalid input '{': expected "+" or "-" (line 1, column 39 (offset: 38))
"MATCH (_:student) WHERE _.student_key = {1} RETURN _"

score 0 · Answer 1 · answered Apr 16 '21 at 18:46

0

There is a mismatch between the py2neo version and the Neo4j version here. Upgrading to py2neo version 4.anything will still give you a version that is several years old, built for the Neo4j of that time. Since then, the parameter syntax has changed, so you cannot use a driver that old with a more recent version of Neo4j.

Upgrade to a far more recent version of py2neo instead.

answered Apr 16 '21 at 18:46

Nigel Small

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But I am not upgrading Neo4j version. – Awais Qureshi Apr 16 '21 at 22:40
Then the older version of py2neo didn't use properties internally for any of the functionality you were using. Either way, you'll need a more up to date version of py2neo, as I've definitely fixed this in those. – Nigel Small Apr 17 '21 at 09:43
Do you have any matrix which provide mapping between py2neo and neo4j compatibility versions ? – Awais Qureshi Apr 19 '21 at 10:26
The versions of Neo4j are listed in the docs for the driver: https://py2neo.readthedocs.io/en/latest/#requirements – Nigel Small Apr 20 '21 at 09:22

After upgrading py2neo version code is giving errors

1 Answers1