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Re: Unable to delete/modify vertices of static labels

Robert Dale <rob...@...>
 

If you need to modify a vertex or possibly delete it before the TTL, then you'll probably want to create a regular vertex.  You could create a 'ttl' property and a mixed index on it. In this way, you could create a reaper process that does g.V().has('mylabel', 'ttl', lt(currentTime-ttl)).drop().

I've created an issue to clarify the documentation and think about creating a way to delete static vertexes - https://github.com/JanusGraph/janusgraph/issues/549

Robert Dale

On Mon, Sep 25, 2017 at 2:11 AM, <abhayti...@...> wrote:

I have made some vertices using Janusgraph-api in java and used Cassandra as backend db. I wanted to use TTL, so I made static vertex labels using JanusgraphManagement. Vertex Labels were made using this code :-

JanusGraphSchemaType vertexLabel = mgmt.makeVertexLabel(label).setStatic().make();

But now I am unable to delete those vertices, as it is throwing this error everytime :-

org.janusgraph.core.SchemaViolationException: Cannot modify unmodifiable vertex: v[8196228]
at org.janusgraph.graphdb.transaction.StandardJanusGraphTx.verifyWriteAccess(StandardJanusGraphTx.java:281) ~[janusgraph-core-0.1.1.jar:na]
at org.janusgraph.graphdb.transaction.StandardJanusGraphTx.removeRelation(StandardJanusGraphTx.java:605) ~[janusgraph-core-0.1.1.jar:na]

I understand that, since vertex labels are static, we cannot delete it. So, is there any way, wherein we may be able to delete/modify vertices as well as set TTL to them using Janusgraph and Cassandra.

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