neo4j - Aggregating relationship properties on a path -

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i'm trying to sum of weights on each path match finds. query below:

start n=node(10200)  match p=(n)-[r*1..5]->(m:facility)  reduce(weights=0, rel in r : weights + rel.weight) weight_sum  all(n in nodes(p) 1=length(filter(m in nodes(p) : m=n)))  return p paths, length(p) pc,   (weight_sum / (length(p) * (length(p) / 2))) sp;

every time run it, i'm getting...

unknown identifier `p`

if remove line (and weight_sum return value), query knows 'p' , executes fine. there problem query value of 'p' being lost? there better alternative sum of these relationship properties?

you can pipe "p" next part of query via with:

start n=node(10200)  match p=(n)-[r*1..5]->(m:facility)  reduce(weights=0, rel in r : weights + rel.weight) weight_sum, p all(n in nodes(p) 1=length(filter(m in nodes(p) : m=n)))  return p paths, length(p) pc,   (weight_sum / (length(p) * (length(p) / 2))) sp;

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