So here's the deal, I'm using Neo4J 3.01 and I have a graph with nodes of
type Action which have amongst other links and properties the following two:
Type: [Comment,Reply,Vote etc]
Date:[epoch timestamp]
I am attempting to run a cypher query that returns a sorted list of nodes
ordered by the date field but collapsing (Collect?) sequential items of the
same type
So for the following nodes:
{*type*:'Comment',*date*:1}
{*type*:'Comment',*date*:2}
{*type*:'Vote',*date*:3}
{*type*:'Comment',*date*:4}
{*type*:'Comment',*date*:5}
{*type*:'Reply',*date*:6}
{*type*:'Reply',*date*:7}
{*type*:'Vote',*date*:8}
{*type*:'Vote',*date*:9}
I would hope to get something like:
{*type*:'Comment',*actions*:[{*type*:'Comment',*date*:1},{*type*:'Comment',
*date*:2}]}
{*type*:'Vote',*actions*:[{*type*:'Vote',*date*:3}]}
{*type*:'Comment',*actions*:[{*type*:'Comment',*date*:4},{*type*:'Comment',
*date*:5}]}
{*type*:'Reply',*actions*:[{*type*:'Reply',*date*:6},{*type*:'Reply',*date*
:7}]}
{*type*:'Vote',*actions*:[{*type*:'Vote',*date*:8},{*type*:'Vote',*date*
:9}]}
I attempted a simple collect and order cypher query:
> Match (a:Action)
> with a.type as type, a order by a.date limit 20
> return type, collect(a) as actions
but this seems to collect each type in its own group regardless of the
sequence, so the actual result is something like:
{*type*:'Comment',*actions*:[{*type*:'Comment',*date*:1},{*type*:'Comment',
*date*:2},{*type*:'Comment',*date*:4},{*type*:'Comment',*date*:5}]}
{*type*:'Vote',*actions*:[{*type*:'Vote',*date*:3},{*type*:'Vote',*date*
:8},{*type*:'Vote',*date*:9}]}
{*type*:'Reply',*actions*:[{*type*:'Reply',*date*:6},{*type*:'Reply',*date*
:7}]}
Any Ideas of how to acheive this using cypher? I have tried different means
of collect and sorts but to no avail
Any help would be great
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