Spring Data Neo4j SDN 6 @CreatedDate not working

Drivers & Stacks Spring Data Neo4j & Neo4j-OGM
1

(or maybe I don't know how to make it work)

I have @EnableNeo4jAuditing on the @Configuration class and @LastModifiedDate works just fine!

But how do I get the created date set? It stays null, no matter which data type I use. What am I missing? (Spring Boot 2.4.0, Java 15)

THANKS for any help or hints!

Cheers, Chris

2

I assume that you are using assigned identifiers(?). In this case SDN cannot distinguish between new or existing entity because the identifier controls the isNew detection.

3

Hi Gerrit,

Here is the simple example I am playing around with:

@Node
public class Movie {

	@Id @GeneratedValue private long id;
	@Version private Long version;
	@CreatedDate private LocalDateTime created;
	@LastModifiedDate private LocalDateTime modified;

	private String title;
	private String tagline;
	private Integer released;
...

modified is set correctly on each change, created is never set.

What has to be done to make this work?

In the past I had an OGM EventListenerAdapter that would set created and modified for me but I thought I would give this built in feature a try. Oh BTW is there a doc/example somewhere how to implement something like an "onPreSave" in the new SDN 6?

Cheers,
Chris

4

Any info is appreciated ;)

5

Short answer: Use a Long instead of the primitive long as the type for you id.

Longer answer: Due to the fact that Neo4j now handles also 0 as a valid identifier value, SDN cannot determine if the node is new or not. As a result it returns false for the new check because the primitive long is 0.

6

Oh - LOL! ... and I was playing with different types of the created field
Thanks!