Questions tagged [gremlin]
Gremlin is the graph traversal language and virtual machine of Apache TinkerPop™
gremlin
3,611
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Gremlin query to find path of vertices for the common value of vertex but different vertex
I am trying to write a query to find all path between 2 given vertices
will give an example to understand my question, here's graph like that, I'm using JanusGraph
Vertex_1(id=1, value='Bob', label='...
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Tinkerpop vertex property single cardinality is not working
When creating a vertex i explicitly mentioned Cardinality as single still its taking list, not able figure out why.
wg.addV("label")
.property(VertexProperty.Cardinality.single,"name&...
- 93
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JanusGraph traversal returns Vertex instead of JanusGraphVertex
I'm using Java to connect to JanusGraph 1.0. I'm having trouble understanding why JanusGraph would ever return a Vertex.
JanusGraph graph = JanusGraphFactory.open('configfile');
JanusGraphVertex jgv = ...
- 1,216
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JanusGraph edges from Java do not appear in Gremlin console
I'm running a JanusGraph server and client per the instructions here. I included an argument to expose port 8182 so I can connect to it from a Java application.
My Java application just creates a new ...
- 1,216
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How to get all incoming direct and indirect nodes with edges of a given node
I have a graph like below
a->b
b->c
d->c
a->c
e->d
c->e
e->a
f->g
g->a
c->h
If i select c, it should return all incoming direct and indirect nodes with edges along the ...
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2
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41
views
Gremlingo stuck while evaluting g.V().hasNext()
I have a piece of code where i evaluate to drop vertices but only if a pre-fetch of
g.V().<filters>.hasNext() returns true.
Problem is on my subsequent call to fetch the nodes themselves it is ...
- 109
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17
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Apache TinkerPop Gremlin query language is not getting converted to Neptune-specific steps that are optimized to run on the underlying Neptune engine
I am using explain() API on AWS neptune cluster as below-
GraphTraversalSource g = getTraversal(cluster);
TraversalExplanation explain = g.V().hasLabel("Users").explain();
System.out....
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27
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Gremlin query, get all the nodes 2 - 4 steps from the selected nodes
I would like to retrieve all the nodes that are 2 to 4 steps away from a selected node.
My thought was that I could separate the query into two repeat().times(2) step so that I can call them later:
...
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Why "Could not locate method: NeptuneGraphTraversal.property()" after addE()?
I'm trying to convert the code from this QA about copying a node from groovy gremlin to nodejs gremlin. One section of that code I've converted like so
this.__.select('source').inE().as('e').
select(...
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Setting constants for usage in math steps with select in gremlin
I have a working js gremlin query for Haversine distance which I am looking to make more composable by setting constants for usage in the math step in some other way than using withSideEffect.
The ...
- 137
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Gremlin - can I attach a property to a path?
So my question is, after traversal, I have got several paths, a path looks like node1-edge1-node2-edge2-node3, now I want to attach a property called 'frequency' to this specific path, and its values ...
- 1
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How is select being used outside a traversal? groovy gremlin vs nodejs gremlin
I found this QA to be very useful, or at least would be if I understood what the heck is going on, and could translate it from groovy gremlin to nodejs gremlin. What's tripping me up is the use of the ...
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66
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Neptune graph traversal that uses dynamically calculated values from last vertex to select outgoing edges for further traversal
Here is my graph:
Here is graph building code:
// backslashes included so the code can be copy and pasted into gremlin console
g\
.addV("Person").property(T.id, "A").as("a&...
- 536
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27
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Neptune Gremlin how to break cycles when collecting paths
I have the following graph:
Created using:
g.addV("Person").property(T.id, "1").as("p1")
.addV("Person").property(T.id, "2").as("p2"...
- 536
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38
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Neptune gremlin graph traversal that uses previous edge property to decide next edge, and the property is a collection
My requirement is to use properties from incoming edge which can be sets of strings to decide which outgoing edges to select for further traversal. If any of the values in one collection can be found ...
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