Merge multiple nodes into single node with relations

[Pawan Wagh]

Hii,

     My current project runs on neo4j and mongodb as database servers. We are having multiple nodes for single user with multiple bi-directional relations. Now the situation is user can request to claim his profile in which i need to merge all available nodes of user into one node with all existing relations to & from that newly generated node. Label for relations may or may not be known so is there any way of merging multiple nodes into one without knowledge of their relations.Please help or any suggestion on how to achieve this are most welcome.

neo4j version : 3.1.1

backend : nodejs
framework : loopback ( strongloop )

[Michael Hunger]

You can use the apoc procedures with apoc.refactor.mergeNode([nodes])

https://neo4j-contrib.github.io/neo4j-apoc-procedures/#_graph_refactoring_2

Michael

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[Pawan Wagh]

Thanks for your suggestion. But what about redirecting all relationships of two nodes into that one node.

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[Michael Hunger]

That will happen automatically.

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[Pawan Wagh]

Hi Michael, are you sure about this.I mean the node's which may be merging could have hundreds of relationships in & out.Sorry to bother but i am not able to figure this out.

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[Michael Hunger]

You can just try it in an example db

Yes, it could even have tens of thousands of relationships.