[Neo] Quick question on finding orphaned nodes

[Rick Bullotta]

"After further review..." (an American football saying we're becoming all
too familiar with)...there is a "hasRelationship()" method on Node that
returns a boolean indicating if the Node has any relationships or not...thus
an "orphan" node would return false.


-----Original Message-----
From: user-bounces at lists.neo4j.org [mailto:user-bounces at lists.neo4j.org] On
Behalf Of Tim Langley
Sent: Saturday, January 16, 2010 8:04 PM
To: Neo user discussions
Subject: Re: [Neo] Quick question on finding orphaned nodes

That would be VERY VERY useful :)
if there was a trivial way to implement this
one of the key use-cases for me is to count the number of relationships

T

On 17 Jan 2010, at 01:01, Rick Bullotta wrote:

> Since there are some cases where what might be considered "orphan"  
> nodes are
> perfectly normal use cases (a node with no relationships), I think  
> the only
> way is to iterate through all nodes and check to see if  
> relationships exist.
>
> Here's a broader question:
>
> Does Neo maintain an in-memory list of relationships for a given  
> node?  If
> so, could the # of relationships be exposed somehow as a property of  
> the
> node?
>
> If so, you could conceivably use a Lucene index on the # of  
> relationships
> and quickly find all nodes with no relationships.
>
>
> -----Original Message-----
> From: user-bounces at lists.neo4j.org [mailto:user- 
> bounces at lists.neo4j.org] On
> Behalf Of Zerony Zhao
> Sent: Saturday, January 16, 2010 12:49 PM
> To: Neo user discussions
> Subject: [Neo] Quick question on finding orphaned nodes
>
> Hi Neo4j users,
>
> Is there a shortcut to find the orphaned nodes on in graph?  
> Currently the
> program uses a loop to check each nodes in the graph to find it is  
> orphaned
> or not. Thanks.
>
> Zerony
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Tel:		+44 7989 539363
Email:	tim at timlangley.me.uk
Web:	http://www.linkedin.com/in/langleytim

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