Comments on: Grails Neo4j plugin 0.2 released

By: ajeesh

ajeesh — Fri, 07 Oct 2011 11:54:15 +0000

please ignore this was not running it in the scope of transaction hence the entities were not getting persisted.

By: ajeesh

ajeesh — Fri, 07 Oct 2011 05:57:38 +0000

Was trying to repeat the example above with grails 1.3.7 and the latest neo4j plugin with
void testSaveWithADynamicProperty() {
def unit = new Trackable();
unit.name=”Project-A”;
unit.save();
assert null == unit.iAmADynamicProperty
unit.iAmADynamicProperty=”XXX”;

assert “XXX” == unit.iAmADynamicProperty;
}

But it produces a

junit.framework.AssertionFailedError: java.lang.AssertionError: instance must be persisted to use non-declared properties. Expression: delegate.node
am i missing something?

By: Stefan Armbruster

Stefan Armbruster — Fri, 31 Dec 2010 21:07:30 +0000

I assume this is a limitation in GORM: a GORM relationship might not have properties attached to it. Of course you might put away with the standard GORM methods and use the native Neo4j API.

By: Polymathicus

Polymathicus — Fri, 31 Dec 2010 20:10:11 +0000

Thanks for this excellent post! One question:

how do I get an association to acquire data properties?

A simple example: suppose I have two grails domain classes, say Community and Person, and Community hasMany [members: Person]. Now, suppose I want to mark the membership by some qualifier, say active/inactive, so that the edge in neo4j knows it. How am I going to do that?

An obvious solution is to promote Membership to be a domain class, and being active a property there. Is there any other way?

By: Stefan Armbruster

Stefan Armbruster — Mon, 19 Jul 2010 13:53:15 +0000

It’ @Neo4jIndexed

By: Giuseppe Acito

Giuseppe Acito — Mon, 19 Jul 2010 13:22:38 +0000

Hi again Stefan: is the correct syntax is @Neo4jIndex or @@Neo4jIndexed ?
Thanks!
Giuseppe

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Neo4j News: Update on Neo4j Ruby bindings | Ruby WebDev Insider — Fri, 12 Mar 2010 12:48:36 +0000

[...] Armbruster IT Blog » Grails Neo4j plugin 0.2 released [...]

By: Versión 0.2 del plugin Neo4J liberada - Observatorio de Grails

Versión 0.2 del plugin Neo4J liberada - Observatorio de Grails — Fri, 12 Mar 2010 11:09:46 +0000

[...] información sobre Grails Neo4J plugin v0.2 (traducido al [...]

By: Peter Neubauer

Peter Neubauer — Thu, 11 Mar 2010 03:55:02 +0000

Very cool Stefan, tested it and it works directly!

/peter

By: mnk2551

mnk2551 — Thu, 11 Mar 2010 01:17:59 +0000

RT @darthvader42: [New Post] Grails Neo4j plugin 0.2 released – via @twitoaster http://blog.armbruster-it.de/2010/03/gra... #grails #neo4j