neo4jrest client question

[Alex]

Hi guys, i use the neo4jrestclient api and looking documentation i
dont know how to visualize all relation
node to node, let me to explain ..

in the documentation i see u can search for incoming or outgoing
relation referred to a node

like this :

rels = node.relationships.incoming()

or

rels = node.relationships.outgoing()

but if i need all the relation referred to two nodes ? like node1
referred to node2, is possible ?



thanks

[Nigel Small]

Hi Alex

I'm not sure exactly how you would do that from within the neo4jrestclient specifically, but it's certainly possible via the REST interface. Py2neo makes it available as below:

http://py2neo.org/doc/py2neo.html#py2neo.neo4j.Node.get_relationships

Nige

[Alex]

Hi Nige,

im in search of something of that :

rels = node1.relationships.node2.<direction>

but dunno if this is done with traversal in more simple manner ..

Thanks

On 18 Apr, 08:38, Nigel Small <ni...@nigelsmall.net> wrote:
> Hi Alex
>
> I'm not sure exactly how you would do that from within the neo4jrestclient
> specifically, but it's certainly possible via the REST interface. Py2neo
> makes it available as below:
>
> http://py2neo.org/doc/py2neo.html#py2neo.neo4j.Node.get_relationships
>
> Nige
>

[James Thornton]

On Wednesday, April 18, 2012 1:44:41 AM UTC-5, Alex wrote:

im in search of something of that :

rels = node1.relationships.node2.<direction>

but dunno if this is done with traversal in more simple manner .. 

You can use a Gremlin script in Bulbs (http://bulbflow.com/) to find all the relationships between nodes "a" and "b"...

>>> from bulbs.neo4jserver import Graph

>>> g = Graph()

>>> script = "g.v(a).bothE().filter{it.outVertex == g.v(b) || it.inVertex == g.v(b)}"

>>> params = dict(a=1, b=2)

>>> edges = g.gremlin.query(script, params)

- James

[Alex]

Nice !

Ty James

[Javier de la Rosa]

Hi, Alex,

There is no way to do that in the neo4jrestclient, but you can use the
script Nigel has written also in the library:

>>> gremlin = gdb.extensions.GremlinPlugin.execute_script

>>> relationships = gremlin(script=script)

Or just returning the data as raw:

>>> relationships = gremlin(script=script, returns=client.constants.RAW)

Another less efficient way is just a comprehesion list like this one:

>>> [r for r in n2.relationships.all(type=["KNOWS"]).all() if n2 in [r.start, r.end]]

It returns all the relationships of types "KNOWS" between n1 and n2,
no matters the direction. Or you can even use traversals.

--
Javier de la Rosa
http://versae.es