Re: [Neo4j] Neo4j-spring-data(4.1.1) self relationship (parent-child) is duplicated

[Luanne Coutinho]

Hi Pulkit,

Would you be able to give us a simple test that demonstrates the issue?

Thanks
Luanne

On Sun, May 1, 2016 at 9:47 PM, pulkit mehra  wrote:

> I am using spring-data-4.1.1 & Neo4j 2.3.2 with ogm annotations
>
> Below is my entity
>
> @NodeEntity(label = "Component")
> public class Component extends BaseEntity {
> .
>
>   @Relationship(type = Relation.LINK_TO)
>   private Set links = new HashSet<>();
>
>   @Relationship(type = Relation.PARENT)
>   private Set parents = new HashSet<>();
> .
> .
>
>
> }
>
> And Link class
>
> @RelationshipEntity(type = Relation.LINK_TO)
> public class Link extends BaseEntity {
>
> @Property(name = "isSelfLink")
> private boolean isSelfLink;
>
> @StartNode
> private Component component;
>
> @EndNode
> private Component linkComponent;
> }
>
> I've removed getter/setter/hashcode/equals for keeping it clean
>
> Now, here is my code to add two component parent/child and a Link
>
> Component parentcomp = new Component(1, name);
> Component childcomp =  new Component(2, name);
> childcomp.getParents().add(parent);
>
> Link link = new Link();
> link.setComponent(parentcomp);
> link.setLinkComponent(childcomp);
> parentcomp.getLinks().add(link);
>
> componentRepository.save(parentcomp,-1);
>
>
> Now, as per the logic
>
>  1. object parentcomp property 'parent' should be empty
>  2. object childcomp property 'parent' should have parentcomp object
>  3. And parentcomp property 'links' should have childcomp
>
> (parentcomp)LINKS_TO>(childcomp)
>
> (parentcomp)
> Note: My equirement is such that we need two way relationship..
>
> But, below is the result when I load parent or child entity
>
>  1. object **parentcomp** property 'parent' has both childcomp,parentcomp
> instead of empty
>  2. object **childcomp** property 'parent' has both childcomp,parentcomp
> instead of only parentcomp
>
> This behavior persist until a Neo4j sessions clears out internally. After
> some time(or after app restart) the mappings shows up correctly.
>
> I tried cleaning up the session using neo4joperations.clear() still
> problem persists. But if I query
>
> match (c:Component)-[:PARENT]->(p) where c.componentId = {0} return p
>
> results are correct.
>
> I am not sure how to solve this problem...
>
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[Neo4j] Neo4j-spring-data(4.1.1) self relationship (parent-child) is duplicated

[pulkit mehra]

I am using spring-data-4.1.1 & Neo4j 2.3.2 with ogm annotations

Below is my entity

@NodeEntity(label = "Component")
public class Component extends BaseEntity {
.

  @Relationship(type = Relation.LINK_TO)
  private Set links = new HashSet<>();

  @Relationship(type = Relation.PARENT)
  private Set parents = new HashSet<>();
.
.


}

And Link class

@RelationshipEntity(type = Relation.LINK_TO)
public class Link extends BaseEntity {

@Property(name = "isSelfLink")
private boolean isSelfLink;

@StartNode
private Component component;

@EndNode
private Component linkComponent;
}

I've removed getter/setter/hashcode/equals for keeping it clean

Now, here is my code to add two component parent/child and a Link

Component parentcomp = new Component(1, name);
Component childcomp =  new Component(2, name);
childcomp.getParents().add(parent);

Link link = new Link();
link.setComponent(parentcomp);
link.setLinkComponent(childcomp);
parentcomp.getLinks().add(link);

componentRepository.save(parentcomp,-1);


Now, as per the logic

 1. object parentcomp property 'parent' should be empty
 2. object childcomp property 'parent' should have parentcomp object
 3. And parentcomp property 'links' should have childcomp

(parentcomp)LINKS_TO>(childcomp)

(parentcomp)(p) where c.componentId = {0} return p

results are correct.

I am not sure how to solve this problem...

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