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Neo4j and lazy fetching

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hholierhoek

Post subject: Neo4j and lazy fetching

Posted: Fri Jun 09, 2017 3:04 pm

Beginner

Joined: Thu Jan 05, 2017 1:47 pm
Posts: 27

We've designated some @ManyToOne fields as FetchType.LAZY, but we're still finding lots of Cypher queries against the db that seem to be resolving the associated entity. E.g.:

Code:

MATCH (owner:ENTITY:`MY_ENTITY_TYPE` {dbId: {0}}) -[r:parent]-> (target) RETURN target 

Is this expected?

It doesn't seem to load the rest of the associated entity though - i.e. there are no queries for its embedded fields or anything.

We're using the 5.0.1 Final OGM.

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DavideD

Post subject: Re: Neo4j and lazy fetching

Posted: Fri Jun 30, 2017 8:01 am

Hibernate Team

Joined: Fri Sep 09, 2011 3:18 am
Posts: 295

Sorry for the late reply,

*-to-one entities are always resolved unless they are not nullable.

Just to be sure, could you show an example of entity mapping, the result you are seeing and the one you expect?

Thanks,
Davide

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hholierhoek

Post subject: Re: Neo4j and lazy fetching

Posted: Fri Jun 30, 2017 8:30 am

Beginner

Joined: Thu Jan 05, 2017 1:47 pm
Posts: 27

Okay, thinking about it I guess it needs to know whether to create a stub or leave the field null in the nullable case. So that makes sense to me.

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