Latest neo4j driver doesn't return the data on non-empty database

Drivers & Stacks Python
1

Hi,
I am back after 2 years. I was using neo4j driver successfully before, but now it does not return any data. Not sure if there is any changes for this: (I am now using latest neo4j official driver)

with driver.session() as session:
      result = session.run("MATCH(n) RETURN n")
      print(result.data(), result.single())

[{'n': {}}] None

I have hard research for this and found nothing helpful.

2

It's working as intended. There is one node that contains no attributes: [{'n': {}}]. Note that after consuming a result, it's empty—like an iterator. So after calling result.data() or doing result_list = list(result), result.single() or repeating one of the above instructions will not give you the same data again. That's why result.single() returns None in your example.

3

Even if I just only use result.single(), it doesn't return the data. And the data() should result more nodes. There's something wrong I can't get the expected result.

After debugging, I got <neo4j.work.result.Result object, as far as I remember it should return <Node. object. I don't know what's going on.

4

Finally, I got it working after trying with very new simple python application. What I was doing wrong that printed result in with statement. Rather I have to separate run syntax outside of with session syntax. And printing value there works perfectly.

5

How does the run work outside the session context? Can you share your sample code?
i have a similar problem where i get result with 4.2 driver but not with 4.3.3 version. Its strange.