Create a edge property using the properties of the 2 nodes it is connected to

Neo4j Graph Platform
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1

I have been trying to create a new edge property using the property of the nodes it has been connected to but am unable to complete the cypher query.

Database: Using the neo4j gds examples airports database

Task: set a property "avgPageRank" to the "has_route" relation from the two nodes its connected to having the property page rank.

````match (p:Airport)-[r:HAS_ROUTE]->(q:Airport)
with collect(r) as routes
foreach(route in routes | SET route.avgPageRank = p.pagerank + q.pagerank)```

Here I am unable to get the access to p and q, the starting airport and the ending airport

2

The variables ‘p’ and ‘q’ are out of scope when you try to reference them in the forEach block. You need to pass them in your ‘with’ clause.

I don’t see the need for the ‘collect’, followed by ‘forEach’, as you are setting each relationship independently based on their end nodes.

this should work just as well:

match (p:Airport)-[r:HAS_ROUTE]->(q:Airport)

SET r.avgPageRank = p.pagerank + q.pagerank