Comments on: Example for using Neo4j with Grails

By: Stefan Armbruster

Stefan Armbruster — Tue, 29 Nov 2011 15:18:19 +0000

The new (and still not officially published) plugin is located at https://github.com/SpringSource/grails-data-mapping. I’m gonna talk about that next week at grailsxchange in London, shortly after the talk I plan to do a detailed blog post about this. NB the new plugin does not use spring-data-neo4j in any way. Using scaffolding is possible with the new plugin.

By: Mark

Mark — Wed, 09 Nov 2011 03:50:50 +0000

For some reason, I decided to use the latest of Neo4j and Grails which aren’t RELEASES but Milestones. NEO4j 1.5.M02 and Grails 2.0.0.RC1 and Spring-data-neo4j 2.0.0.M1. Do you think it is possible to use the plugin to set the basics and able to have Grails generate the scaffolding and Controllers. Then just add the newer features?

Thanks

Mark

By: Jean-Sébastien Stoffen

Jean-Sébastien Stoffen — Sun, 07 Aug 2011 13:12:32 +0000

Hi,
Thank you for your answer.
I’m interested in the new version of your plugin.
I’m discovering Grails Neo4j and Groovy.

I’m still wondering about something : when I create a new instance of an object using a Grails controller, I save it and the graph is not updated. It’s probably something to set in the DataSource.groovy.
Could you show me how to configure it?

Thank you,
Jean-Sébastien.

By: Stefan Armbruster

Stefan Armbruster — Sat, 06 Aug 2011 16:10:16 +0000

The plugin uses grails.neo4j.storeDir from Config.groovy to specify the directory where Neo4j writes to. Be aware, I’m currently in the stage of preparing a new release of the neo4j plugin providing full GORM compliance – unfortunately this will not be 100% compatible to the <0.3.1 versions. For the new stuff, look at https://github.com/SpringSource/grails-data-mapping/

By: Jean-Sébastien Stoffen

Jean-Sébastien Stoffen — Sat, 06 Aug 2011 15:40:56 +0000

Hi,

Thank you for this plugin.
I’ve one question : when I follow the example showed above, everything is working but the data are not saved in the graph : the org.codehaus.groovy.grails.plugins.neo4j.Neo4jController always show me an empty graph.

Should I modify the DataSource.groovy?
The example don’t speak about it.

Regards,
Jean-Sébastien Stoffen

By: Stefan Armbruster

Stefan Armbruster — Tue, 19 Jul 2011 17:34:36 +0000

@preet Did not use STS recently. In IntelliJ I'll open the project structure, navigate to the neo4j plugin and mark src/ast as source folder.

By: preet

preet — Tue, 19 Jul 2011 15:49:19 +0000

Thanks Stefan.

I am using SpringSource Tool Suite Version: 2.7.1.RELEASE, i couldn’t find src/ast under under plugin when i expand it.

However i see “done precompiling AST transformations” when i do run-app

How do i suppress IDE error at @Neo4jEntity?

Thankyou

By: preet

preet — Tue, 19 Jul 2011 14:41:14 +0000

Thanks Stefan.

I am using Eclipse IDE, i couldn’t find src/ast directory when i expanded plugin in eclipse.

However when i do run-app i see fallowing, it says “Precompiling neo4j plugin – required because of AST transformations” and app running..

how do i suppress eclipse error?

==
Welcome to Grails 1.3.7 – http://grails.org/
Licensed under Apache Standard License 2.0
Grails home is set to: C:\grails_project\springsource-tool-suite-2.6.1.SR1-e3.6.2-win32-x86_64\springsource\grails-1.3.7\

Base Directory: C:\grails_project\neotest
Resolving dependencies…
Dependencies resolved in 2560ms.
Running script C:\grails_project\springsource-tool-suite-2.6.1.SR1-e3.6.2-win32-x86_64\springsource\grails-1.3.7\scripts\RunApp.groovy
Environment set to development
[echo] plugin files: file [C:\Users\preet\.grails\1.3.7\projects\neotest\plugins\neo4j-0.3.1-SNAPSHOT\.]
[echo] Precompiling neo4j plugin – required because of AST transformations…
[echo] src C:/Users/preet/.grails/1.3.7/projects/neotest/plugins/neo4j-0.3.1-SNAPSHOT C:\Users\preet\.grails\1.3.7\projects\neotest\plugin-classes
[echo] done precompiling AST transformations
[exec] The command attribute is deprecated.
[exec] Please use the executable attribute and nested arg elements.
[exec] FIND: Parameter format not correct
[exec] Result: 2
[groovyc] Compiling 1 source file to C:\grails_project\neotest\target\classes
[delete] Deleting directory C:\Users\preet\.grails\1.3.7\projects\neotest\tomcat
Running Grails application..
Server running. Browse to http://localhost:8080/neotest

By: Stefan Armbruster

Stefan Armbruster — Tue, 19 Jul 2011 07:22:13 +0000

If using from an IDE, make sure neo4jplugin’s src/ast directory is a source folder – that’s where Neo4jEntity annotation is located. If running grails run-app, do you see a line like ‘Precompiling neo4j plugin – required because of AST transformations…’ on stdout/stderr ?

By: preet

preet — Mon, 18 Jul 2011 21:56:10 +0000

Hi Stefan, i was trying to use neo4j plugin 0.3.1 with grails 1.3.7 and 1.1 neo4j db. Getting error at entity annotation, please help me.

error
==
Groovy:class grails.plugins.neo4j.Neo4jEntity is not an annotation in @grails.plugins.neo4j.Neo4jEntity