CODEWITHSUNDEEP
neo4jgremlin
Aleksandrenko
Aleksandrenko

Reputation: 3063

gremlin request

How can i request with gremlin a limited list of nodes with properties of my choosing?

Something like:

g.V. 10 nodes with nodeType=="User", return only id, name and email.

Upvotes: 1

Views: 215

Answers (4)

jbmusso
jbmusso

Reputation: 3456

Using TinkerPop 3+, that would be:

g.V().hasLabel('user').limit(10).valueMap(true, 'name', 'email')

Calling valueMap(true) returns both the id and the label of the traversed graph element.

For performance, it is now recommended to avoid lambdas and use Gremlin steps.

Upvotes: 2

Kelvin Lawrence
Kelvin Lawrence

Reputation: 14391

If you are using Tinkerpop 3 and you have the "Type" you are are searching on defined as the node label then you can do something like this:

g.V.hasLabel('User')[0..10].valueMap.select('id','name','e-mail')

Note also that I think you need to specify [0..10] if you want 10 nodes and not [0..9]

However I totally defer to Marko's answer on performance as he understands the internals. I just like the clean feel of hasLabel().

Upvotes: 0

Marko A. Rodriguez
Marko A. Rodriguez

Reputation: 1702

For speed, do filter{it.getProperty('nodeType').equals('User')}...

Upvotes: 2

VolkanT
VolkanT

Reputation: 634

g.V.filter{it.nodeType=='User'}[0..9].transform(){it.id +  ' ' + it.name + ' ' + it.email}

Upvotes: 0

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