Re: [Neo4j] Update/Move relationships through REST APIs
Thanks!
On Wed, Aug 31, 2011 at 6:50 PM, Marko Rodriguez wrote:
> Hey,
>
> One more thing.
>
> WARNING: If your transaction mode is AUTOMATIC, then there will be one
> transaction for each mutation !! tx.begin/tx.commit/tx.finish
>
> gremlin> g.transactionMode
> ==>AUTOMATIC
>
> You can use a transaction manager if you plan this query to iterate over
> lots of vertices and do lots of mutations:
>
> https://github.com/tinkerpop/blueprints/wiki/Graph-Transactions-Helpers
>
> Thus, your mutating traversal would be:
>
>manager = TransactionalGraphHelper.createCommitManager(g, 1000);
>g.V.outE('foo').sideEffect{g.addEdge(it.outVertex,g.v('B'),'foo');
> g.removeEdge(it); manager.incrCounter()}
>manager.close();
>
> Hope that helps -- and doesn't confuse :).
>
> Marko.
> http://markorodriguez.com
>
> P.S. Gremlin 1.3 will make it much more natural to do batch transactions.
> TransactionGraphs (like Neo4j) will have a "setTransactionBuffer(int
> bufferSize)" method so you don't need to create this CommitManager object.
> Anywho. Thats that. See ya.
>
> On Aug 31, 2011, at 7:38 PM, Marko Rodriguez wrote:
>
> > Hi,
> >
> > I did you example over TinkerGraph as vertex IDs are Strings and thus,
> easy to build your graph with.
> >
> > ~$ gremlin
> > \,,,/
> > (o o)
> > -oOOo-(_)-oOOo-
> > gremlin> g = new TinkerGraph()
> > ==>tinkergraph[vertices:0 edges:0]
> > gremlin> g.addVertex('A'); g.addVertex('B'); g.addVertex('C');
> g.addVertex('D'); g.addVertex('E');
> > ==>v[E]
> > gremlin> g.addEdge(g.v('C'),g.v('A'),'foo');
> g.addEdge(g.v('D'),g.v('A'),'foo'); g.addEdge(g.v('E'),g.v('A'),'bar')
> > ==>e[2][E-bar->A]
> > gremlin> g.V
> > ==>v[D]
> > ==>v[E]
> > ==>v[A]
> > ==>v[B]
> > ==>v[C]
> > gremlin> g.E
> > ==>e[2][E-bar->A]
> > ==>e[1][D-foo->A]
> > ==>e[0][C-foo->A]
> >
> > So, you have your 5 vertices and 3 edges. Next, here is your mutating
> traversal:
> >
> > gremlin>
> g.V.outE('foo').sideEffect{g.addEdge(it.outVertex,g.v('B'),'foo');
> g.removeEdge(it)}
> > ==>e[1][D-foo->A]
> > ==>e[0][C-foo->A]
> >
> > And now your edges are as you wanted them.
> >
> > gremlin> g.E
> > ==>e[3][D-foo->B]
> > ==>e[2][E-bar->A]
> > ==>e[4][C-foo->B]
> >
> > So again, your traversal is:
> >
> > g.V.outE('foo').sideEffect{g.addEdge(it.outVertex,g.v('B'),'foo');
> g.removeEdge(it)}
> >
> > Here is what the traversal says step-by-step:
> >
> > g.V : iterate through all vertices
> > outE('foo') : iterate through their the outgoing 'foo' labeled
> edges
> > sideEffect{} : yield a sideEffect (mutate state)
> > g.addEdge(it.outVertex,g.v('B'),'foo'): add a new edge from
> the vertex (e.g. C,D,E -- it.outVertex) to vertex B with label 'foo'.
> > g.removeEdge(it) : remove the current edge (it)
> >
> >
> > Note that its more optimal to do:
> >
> > v = g.v('B');
> g.V.outE('foo').sideEffect{g.addEdge(it.outVertex,v,'foo');
> g.removeEdge(it)}
> >
> > Also, vertex IDs are not Strings in Neo4j, but longs. Hopefully you can
> do what you need from here.
> >
> > Good luck,
> > Marko.
> >
> > http://markorodriguez.com
> >
> > On Aug 31, 2011, at 6:17 PM, Nuo Yan wrote:
> >
> >> I want to update the ending node for all relationships that are type
> :foo
> >> coming into node A to node B.
> >>
> >> For example, for all relationships that are type :foo coming into node A
> >> (node A as the end node), no matter where their starting node is, I want
> >> them to set the end node to node B.
> >>
> >> Node C --:foo--> Node A
> >> Node D --:foo--> Node A
> >> Node E --:bar--> Node A
> >>
> >> would become:
> >>
> >> Node C --:foo--> Node B
> >> Node D --:foo -> Node B
> >> Node E --:bar--> Node A
> >>
> >> On Wed, Aug 31, 2011 at 5:00 PM, Marko Rodriguez >wrote:
> >>
> >>> Hi,
> >>>
> >>> If you tell me in English what you want to do, I can give you the
> Gremlin
> >>> query. With Gremlin, you can traverse and update in a single query so
> >>> perhaps it will meet your needs.
> >>>
> >>> Marko.
> >>>
> >>> http://markorodriguez.com
> >>>
> >>> On Aug 31, 2011, at 5:13 PM, Nuo Yan wrote:
> >>>
> I looked through the REST APIs and didn't see an endpoint to move
> relationships. Is such operation possible? For example, given a set of
> relationships all end in one node, I want to send a bulk request to
> >>> update
> their end nodes to another node.
>
> If there is no REST API for updating/moving relationship, what is the
> >>> best
> way to do this? Can gremlin do it easily? Or do I have to delete all
> of
> >>> the
> relationships and create new ones to the new end node?
>
> Thanks,
> Nuo
> ___
> Neo4j mailing list
> User@lists.neo4j.org
> https://lists.neo4j.org/mailman/listinfo/user
> >>>
> >>> ___
> >>> Neo4j mailing list
> >>> User@lists.neo4j.org
> >>> https://lists.neo4j.org/mai
Re: [Neo4j] Update/Move relationships through REST APIs
Hey,
One more thing.
WARNING: If your transaction mode is AUTOMATIC, then there will be one
transaction for each mutation !! tx.begin/tx.commit/tx.finish
gremlin> g.transactionMode
==>AUTOMATIC
You can use a transaction manager if you plan this query to iterate over lots
of vertices and do lots of mutations:
https://github.com/tinkerpop/blueprints/wiki/Graph-Transactions-Helpers
Thus, your mutating traversal would be:
manager = TransactionalGraphHelper.createCommitManager(g, 1000);
g.V.outE('foo').sideEffect{g.addEdge(it.outVertex,g.v('B'),'foo');
g.removeEdge(it); manager.incrCounter()}
manager.close();
Hope that helps -- and doesn't confuse :).
Marko.
http://markorodriguez.com
P.S. Gremlin 1.3 will make it much more natural to do batch transactions.
TransactionGraphs (like Neo4j) will have a "setTransactionBuffer(int
bufferSize)" method so you don't need to create this CommitManager object.
Anywho. Thats that. See ya.
On Aug 31, 2011, at 7:38 PM, Marko Rodriguez wrote:
> Hi,
>
> I did you example over TinkerGraph as vertex IDs are Strings and thus, easy
> to build your graph with.
>
> ~$ gremlin
> \,,,/
> (o o)
> -oOOo-(_)-oOOo-
> gremlin> g = new TinkerGraph()
> ==>tinkergraph[vertices:0 edges:0]
> gremlin> g.addVertex('A'); g.addVertex('B'); g.addVertex('C');
> g.addVertex('D'); g.addVertex('E');
> ==>v[E]
> gremlin> g.addEdge(g.v('C'),g.v('A'),'foo');
> g.addEdge(g.v('D'),g.v('A'),'foo'); g.addEdge(g.v('E'),g.v('A'),'bar')
>
> ==>e[2][E-bar->A]
> gremlin> g.V
> ==>v[D]
> ==>v[E]
> ==>v[A]
> ==>v[B]
> ==>v[C]
> gremlin> g.E
> ==>e[2][E-bar->A]
> ==>e[1][D-foo->A]
> ==>e[0][C-foo->A]
>
> So, you have your 5 vertices and 3 edges. Next, here is your mutating
> traversal:
>
> gremlin> g.V.outE('foo').sideEffect{g.addEdge(it.outVertex,g.v('B'),'foo');
> g.removeEdge(it)}
> ==>e[1][D-foo->A]
> ==>e[0][C-foo->A]
>
> And now your edges are as you wanted them.
>
> gremlin> g.E
> ==>e[3][D-foo->B]
> ==>e[2][E-bar->A]
> ==>e[4][C-foo->B]
>
> So again, your traversal is:
>
> g.V.outE('foo').sideEffect{g.addEdge(it.outVertex,g.v('B'),'foo');
> g.removeEdge(it)}
>
> Here is what the traversal says step-by-step:
>
> g.V : iterate through all vertices
> outE('foo') : iterate through their the outgoing 'foo' labeled edges
> sideEffect{} : yield a sideEffect (mutate state)
> g.addEdge(it.outVertex,g.v('B'),'foo'): add a new edge from the
> vertex (e.g. C,D,E -- it.outVertex) to vertex B with label 'foo'.
>
> g.removeEdge(it) : remove the current edge (it)
>
>
> Note that its more optimal to do:
>
> v = g.v('B');
> g.V.outE('foo').sideEffect{g.addEdge(it.outVertex,v,'foo'); g.removeEdge(it)}
>
> Also, vertex IDs are not Strings in Neo4j, but longs. Hopefully you can do
> what you need from here.
>
> Good luck,
> Marko.
>
> http://markorodriguez.com
>
> On Aug 31, 2011, at 6:17 PM, Nuo Yan wrote:
>
>> I want to update the ending node for all relationships that are type :foo
>> coming into node A to node B.
>>
>> For example, for all relationships that are type :foo coming into node A
>> (node A as the end node), no matter where their starting node is, I want
>> them to set the end node to node B.
>>
>> Node C --:foo--> Node A
>> Node D --:foo--> Node A
>> Node E --:bar--> Node A
>>
>> would become:
>>
>> Node C --:foo--> Node B
>> Node D --:foo -> Node B
>> Node E --:bar--> Node A
>>
>> On Wed, Aug 31, 2011 at 5:00 PM, Marko Rodriguez wrote:
>>
>>> Hi,
>>>
>>> If you tell me in English what you want to do, I can give you the Gremlin
>>> query. With Gremlin, you can traverse and update in a single query so
>>> perhaps it will meet your needs.
>>>
>>> Marko.
>>>
>>> http://markorodriguez.com
>>>
>>> On Aug 31, 2011, at 5:13 PM, Nuo Yan wrote:
>>>
I looked through the REST APIs and didn't see an endpoint to move
relationships. Is such operation possible? For example, given a set of
relationships all end in one node, I want to send a bulk request to
>>> update
their end nodes to another node.
If there is no REST API for updating/moving relationship, what is the
>>> best
way to do this? Can gremlin do it easily? Or do I have to delete all of
>>> the
relationships and create new ones to the new end node?
Thanks,
Nuo
___
Neo4j mailing list
User@lists.neo4j.org
https://lists.neo4j.org/mailman/listinfo/user
>>>
>>> ___
>>> Neo4j mailing list
>>> User@lists.neo4j.org
>>> https://lists.neo4j.org/mailman/listinfo/user
>>>
>> ___
>> Neo4j mailing list
>> User@lists.neo4j.org
>> https://lists.neo4j.org/mailman/listinfo/user
>
___
N
Re: [Neo4j] Update/Move relationships through REST APIs
Hi,
I did you example over TinkerGraph as vertex IDs are Strings and thus, easy to
build your graph with.
~$ gremlin
\,,,/
(o o)
-oOOo-(_)-oOOo-
gremlin> g = new TinkerGraph()
==>tinkergraph[vertices:0 edges:0]
gremlin> g.addVertex('A'); g.addVertex('B'); g.addVertex('C');
g.addVertex('D'); g.addVertex('E');
==>v[E]
gremlin> g.addEdge(g.v('C'),g.v('A'),'foo');
g.addEdge(g.v('D'),g.v('A'),'foo'); g.addEdge(g.v('E'),g.v('A'),'bar')
==>e[2][E-bar->A]
gremlin> g.V
==>v[D]
==>v[E]
==>v[A]
==>v[B]
==>v[C]
gremlin> g.E
==>e[2][E-bar->A]
==>e[1][D-foo->A]
==>e[0][C-foo->A]
So, you have your 5 vertices and 3 edges. Next, here is your mutating traversal:
gremlin> g.V.outE('foo').sideEffect{g.addEdge(it.outVertex,g.v('B'),'foo');
g.removeEdge(it)}
==>e[1][D-foo->A]
==>e[0][C-foo->A]
And now your edges are as you wanted them.
gremlin> g.E
==>e[3][D-foo->B]
==>e[2][E-bar->A]
==>e[4][C-foo->B]
So again, your traversal is:
g.V.outE('foo').sideEffect{g.addEdge(it.outVertex,g.v('B'),'foo');
g.removeEdge(it)}
Here is what the traversal says step-by-step:
g.V : iterate through all vertices
outE('foo') : iterate through their the outgoing 'foo' labeled edges
sideEffect{} : yield a sideEffect (mutate state)
g.addEdge(it.outVertex,g.v('B'),'foo'): add a new edge from the
vertex (e.g. C,D,E -- it.outVertex) to vertex B with label 'foo'.
g.removeEdge(it) : remove the current edge (it)
Note that its more optimal to do:
v = g.v('B');
g.V.outE('foo').sideEffect{g.addEdge(it.outVertex,v,'foo'); g.removeEdge(it)}
Also, vertex IDs are not Strings in Neo4j, but longs. Hopefully you can do what
you need from here.
Good luck,
Marko.
http://markorodriguez.com
On Aug 31, 2011, at 6:17 PM, Nuo Yan wrote:
> I want to update the ending node for all relationships that are type :foo
> coming into node A to node B.
>
> For example, for all relationships that are type :foo coming into node A
> (node A as the end node), no matter where their starting node is, I want
> them to set the end node to node B.
>
> Node C --:foo--> Node A
> Node D --:foo--> Node A
> Node E --:bar--> Node A
>
> would become:
>
> Node C --:foo--> Node B
> Node D --:foo -> Node B
> Node E --:bar--> Node A
>
> On Wed, Aug 31, 2011 at 5:00 PM, Marko Rodriguez wrote:
>
>> Hi,
>>
>> If you tell me in English what you want to do, I can give you the Gremlin
>> query. With Gremlin, you can traverse and update in a single query so
>> perhaps it will meet your needs.
>>
>> Marko.
>>
>> http://markorodriguez.com
>>
>> On Aug 31, 2011, at 5:13 PM, Nuo Yan wrote:
>>
>>> I looked through the REST APIs and didn't see an endpoint to move
>>> relationships. Is such operation possible? For example, given a set of
>>> relationships all end in one node, I want to send a bulk request to
>> update
>>> their end nodes to another node.
>>>
>>> If there is no REST API for updating/moving relationship, what is the
>> best
>>> way to do this? Can gremlin do it easily? Or do I have to delete all of
>> the
>>> relationships and create new ones to the new end node?
>>>
>>> Thanks,
>>> Nuo
>>> ___
>>> Neo4j mailing list
>>> User@lists.neo4j.org
>>> https://lists.neo4j.org/mailman/listinfo/user
>>
>> ___
>> Neo4j mailing list
>> User@lists.neo4j.org
>> https://lists.neo4j.org/mailman/listinfo/user
>>
> ___
> Neo4j mailing list
> User@lists.neo4j.org
> https://lists.neo4j.org/mailman/listinfo/user
___
Neo4j mailing list
User@lists.neo4j.org
https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Update/Move relationships through REST APIs
I want to update the ending node for all relationships that are type :foo coming into node A to node B. For example, for all relationships that are type :foo coming into node A (node A as the end node), no matter where their starting node is, I want them to set the end node to node B. Node C --:foo--> Node A Node D --:foo--> Node A Node E --:bar--> Node A would become: Node C --:foo--> Node B Node D --:foo -> Node B Node E --:bar--> Node A On Wed, Aug 31, 2011 at 5:00 PM, Marko Rodriguez wrote: > Hi, > > If you tell me in English what you want to do, I can give you the Gremlin > query. With Gremlin, you can traverse and update in a single query so > perhaps it will meet your needs. > > Marko. > > http://markorodriguez.com > > On Aug 31, 2011, at 5:13 PM, Nuo Yan wrote: > > > I looked through the REST APIs and didn't see an endpoint to move > > relationships. Is such operation possible? For example, given a set of > > relationships all end in one node, I want to send a bulk request to > update > > their end nodes to another node. > > > > If there is no REST API for updating/moving relationship, what is the > best > > way to do this? Can gremlin do it easily? Or do I have to delete all of > the > > relationships and create new ones to the new end node? > > > > Thanks, > > Nuo > > ___ > > Neo4j mailing list > > User@lists.neo4j.org > > https://lists.neo4j.org/mailman/listinfo/user > > ___ > Neo4j mailing list > User@lists.neo4j.org > https://lists.neo4j.org/mailman/listinfo/user > ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Update/Move relationships through REST APIs
Hi, If you tell me in English what you want to do, I can give you the Gremlin query. With Gremlin, you can traverse and update in a single query so perhaps it will meet your needs. Marko. http://markorodriguez.com On Aug 31, 2011, at 5:13 PM, Nuo Yan wrote: > I looked through the REST APIs and didn't see an endpoint to move > relationships. Is such operation possible? For example, given a set of > relationships all end in one node, I want to send a bulk request to update > their end nodes to another node. > > If there is no REST API for updating/moving relationship, what is the best > way to do this? Can gremlin do it easily? Or do I have to delete all of the > relationships and create new ones to the new end node? > > Thanks, > Nuo > ___ > Neo4j mailing list > User@lists.neo4j.org > https://lists.neo4j.org/mailman/listinfo/user ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
[Neo4j] Update/Move relationships through REST APIs
I looked through the REST APIs and didn't see an endpoint to move relationships. Is such operation possible? For example, given a set of relationships all end in one node, I want to send a bulk request to update their end nodes to another node. If there is no REST API for updating/moving relationship, what is the best way to do this? Can gremlin do it easily? Or do I have to delete all of the relationships and create new ones to the new end node? Thanks, Nuo ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
