We have the following scenario: 2 NodeEntity class (A

There's a similar issue when using generics and converters: <div class="snippet-cl

<a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/us

Generic and Abstract Relationship Entity about neo4j-ogm HOT 5 CLOSED

neo4j commented on June 7, 2024

Generic and Abstract Relationship Entity

from neo4j-ogm.

Comments (5)

ArashJalalian commented on June 7, 2024 2

Any solution for this?

from neo4j-ogm.

luanne commented on June 7, 2024

There's a similar issue when using generics and converters:

@Convert(MapJson.class)
private Map<String,Object> attributes;

public class MapJson implements AttributeConverter<Map<String,Object>,String> { .. }

Exception:

Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: java/lang/String;Ljava/lang/Object
    at org.neo4j.ogm.metadata.ClassUtils.getType(ClassUtils.java:94)
    at org.neo4j.ogm.entityaccess.FieldWriter.write(FieldWriter.java:68)
    at org.neo4j.ogm.mapper.GraphEntityMapper.writeProperty(GraphEntityMapper.java:162)
    at org.neo4j.ogm.mapper.GraphEntityMapper.setProperties(GraphEntityMapper.java:127)
    at org.neo4j.ogm.mapper.GraphEntityMapper.mapNodes(GraphEntityMapper.java:108)
    at org.neo4j.ogm.mapper.GraphEntityMapper.mapEntities(GraphEntityMapper.java:92)
    ... 35 more
Caused by: java.lang.ClassNotFoundException: java/lang/String;Ljava/lang/Object
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:270)
    at org.neo4j.ogm.metadata.classloader.MetaDataClassLoader.loadClass(MetaDataClassLoader.java:34)
    at org.neo4j.ogm.metadata.ClassUtils.getType(ClassUtils.java:92)
    ... 40 more

from neo4j-ogm.

vince-bickers commented on June 7, 2024

@luanne The converters problem is slightly different. I've created a separate ticket for it here: #102

from neo4j-ogm.

mihairaulea commented on June 7, 2024

This is very interesting. Can you please explain the use case? What are you going to do with this? Can you help me understand why you would do this?

from neo4j-ogm.

mihairaulea commented on June 7, 2024

I think the user is trying to link A and B type nodes with relationships that have properties of a certain type. This would be useful for querying the graph by relationship property type. This is a more suitable use case for Cypher.

from neo4j-ogm.

Recommend Projects