neo4j

Posts about the Neo4j graphdb (http://neo4j.org/)

Neo4jClient with LinqPad

Quite often I want to just try out some code, usually useful when answering a question on StackOverflow, but typically these don’t require a full solution, and it’s a bit heavy handed to whip out Visual Studio for a simple create / match query, so what about LinqPad? One of the most awesome tools for a .NET developer (if you haven’t got it, you should get it). I’m going to assume a few things here: You have got Neo4j running and know the url (if you’ve changed it) You have downloaded and installed ......

Ninjecting Neo4jClient into MVC5/4/3

First, create your new MVC project (or load your existing one!) Then add the Ninject.MVC nuget package: We’ll also want the Neo4jClient package Now we have those two, we can hook it up, first off we need to tell Ninject how to bind to Neo4jClient, I use a Module for this, so add this class to your project (usually I have them in a sub-folder called ‘Modules’ in the App_Start folder – but it can be anywhere):public class Neo4jModule : NinjectModule { /// <summary>Loads the module into the kernel.</summary> ......

Error: Unable to access jarfile d:\Databases\Neo4j

Cryptic. I’ve spent a large proportion of time on this, and straight off the bat – NO this is not the ‘windows-jarfile’ error of the old skool days. No, this is a pretty simple issue, my folder structure was: d:\Databases\Neo4j d:\Databases\Neo4j Trie Inside each a copy of the the ‘zip’ contents, with different configuration properties for the various things (ports etc) so I could run multiple copies of Neo4j at the same time. All good. EXCEPT I get this error from the “Neo4j Trie” folder when I ......

Writing Neo4j Console

So, Neo4j Console is now open sourced at: https://github.com/tournr/n... feel free to branch, fix, edit whatever and issue pull requests, or even just have a gander and code review :) I thought I’d write some notes on what I’ve done and why. Let’s split it into 2 main areas, UI and Backend. The UI Extremely simple WPF front end – I mean – it’s only got 3 text boxes! If I’m honest, it’s not what I want – I want to create a console window like the F# console, something which really does act ......

The Neo4j 1.9 to 2.0 Upgrade

So, with Neo4j 2.0 on the near horizon (RC1 out), it seemed appropriate to upgrade all my current codebase from 1.9 to 2.0. Generally, as a rule of thumb, the conversion has been pretty smooth, there are some pre-2.0 gaffs I’ve made which have made it slightly harder than it needed to be – but the ability to use 1.9 cypher in 2.0 db is incredibly useful. So – I’m (as you can probably tell) a .NET developer, which means I use the excellent neo4jclient to perform pretty much all of my interaction with ......

Neo4j Console

Hey Hey Super Early adopters, if you’re using Neo4j and you’re a Visual Studio developer (which probably means I’ve just lot 99% of the audience :)) please try Neo4j Console, it’s an extension for Visual Studio 2013 that allows you to make calls to your local (or remote) server instance of Neo4j. So, once you’ve downloaded it – the question I guess is HOW DO I USE THAT!!!?? Opening It Once installed, it finds itself in the ‘View->Other Windows’ menu, it’s called ‘Neo4j Console’, just like the ......

Another day, another blog post update

Gist: https://gist.github.com/csk... I know! Another question on StackOverflow leads to yet another blog post being updated to use the newer Neo4jClient. So here goes: Darko Micics has written a post about using Neo4jClient with C#.Net, and a question has arisen on StackOverflow asking about how to (in effect) do this in the new version of the Neo4JClient – the version where ‘CreateRelationship’ et al have been marked as obsolete. Luckily, this is a pretty simple (twitter-ish) data set ......

A Clear DB solution for Neo4j 2.0 RC1

The old skool way (pre RC1) of wiping the database was: //Clear DB START n=node(*) MATCH (n)-[r?]-() DELETE n, r Which worked fine for M06 and previous, but, RC1 doesn’t allow optional relationships (using the ? operator) you’ll need to update to: //Clear DB START n=node(*) OPTIONAL MATCH (n)-[r]-() DELETE n, r ......

Using Neo4j with F# – Cypher 2.0

There’s an excellent post by Sergey Tihon about using Neo4j with F#, written back in March, before Neo4j began the progression into Cypher 2.0. (Gist for this here: https://gist.github.com/csk... Some of the benefits of the newer Neo4jClient versions are the general move away from using Node / NodeReferences and going for a more consistent Cypher only approach, so I’ve updated the code by Sergey to use the 2.0 stuff (as part of the process of answering this StackOverflow question). BTW: ......

Neo4JClient – Getting Path Results

So, let’s get this straight off the bat – Craig Brett has written about using the PathResults from Neo4jclient (a .NET REST client to Neo4J), but times have moved on, and there are some specifics I’ve needed to work out with the newer clients (this post – for reference uses Neo4jclient version: 1.0.0.590). The problem I want to get all the nodes and relationships from starting node ‘n’ going out ‘x’ levels. In Cypher – that’s pretty simple: START n = node(2) MATCH p = n-[:RELATION*1..3]-() RETURN ......

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