neo4j rest API resultDataContents:graph does not really returns one graph?

Question

To make yet another d3 viewer, I'd like to get a graph out from a rest query.

In my understanding, stating 'resultDataContent':['graph'] would return a graph. Instead, it return a list of subgraphs and I need therefore to collect and distinct the nodes. Is there a way to get the full sub graph simply?

For example, I put these 4 nodes

CREATE (a:Person {name:'a'}) CREATE (b:Person {name:'b'}) CREATE (c:Person {name:'c'}) CREATE (d:Person {name:'d'}) CREATE (a)-[:KNOWS]->(b) CREATE (a)-[:KNOWS]->(c) CREATE (b)-[:KNOWS]->(c) CREATE (c)-[:KNOWS]->(d)

But calling a POST query with the following query will return 2 results.data, each of them with a "graph", consisting of 2 nodes and a links?

{"statements":[ { "statement":"MATCH (p:Person {name:{pName}})-[l:KNOWS]-(q:Person) RETURN p,l,q", "parameters":{"pName":"a"}, "resultDataContents":["graph"] } ]}

Is there a way to return the one subgraph, without the need to reassemble the results?

Thanks for the help, Alex

Håkan Löfqvist · Accepted Answer · 2015-04-28 12:33:47Z

I think the issue is that the same person will be returned twice by your query. Change the return statement to:

RETURN collect(distinct(p)),collect(l),collect(distinct(q))

That will give you the following response:

{ "results": [ { "columns": [ "collect(distinct(p))", "collect(l)", "collect(distinct(q))" ], "data": [ { "graph": { "nodes": [ { "id": "1849644", "labels": [ "Person" ], "properties": { "name": "b" } }, { "id": "1849645", "labels": [ "Person" ], "properties": { "name": "c" } }, { "id": "1849643", "labels": [ "Person" ], "properties": { "name": "a" } } ], "relationships": [ { "id": "4052753", "type": "KNOWS", "startNode": "1849643", "endNode": "1849644", "properties": {} }, { "id": "4052754", "type": "KNOWS", "startNode": "1849643", "endNode": "1849645", "properties": {} } ] } } ] } ], "errors": [] }

Community · Accepted Answer · 2017-05-23 12:00:14Z

Whilst working on something similar (https://stackoverflow.com/questions/26067792/neo4j-cypher-gui) I've run into the same problem. The documentation: http://docs.neo4j.org/chunked/stable/rest-api-transactional.html is very light on the subject

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