How to store properties of a neo4j node as an array?

问题

I am working on an HR analytics projects using neo4j and I encountered a complicated query (I am also very new to cypher). Basically, I have a list of employee with some features like location, skill set, education and positions with location, skills required. I look if location (employee’s location and position’s location) matches and set that score to 1 (0 otherwise). If I have only one open position, the query works fine. However, with more positions the variable gets overwritten with last value of last position. I would imagine putting the node properties in an array but doesn’t seem that cypher has that (deprecated).

https://neo4j.com/docs/rest-docs/current/#rest-api-property-values

This is the query that I use and I would be grateful if you can help me resolve the issue. Final goal is to have a score for every employee per a given position and fill the position with the employee with highest score. Is this even possible on cypher?? Thanks a lot

MATCH
  (e:Employee)-[r:FUTURE_POSITION]-> (p:Position {open_status:1}),
  (e)-[h:HAS_DEGREE]-> (d:Degree),
  (e)-[s:HAS_SKILL]-> (n:Personal_Skill)   
WITH r, e,p,d,n,
  CASE WHEN p.position_state = e.home_state THEN 1 ELSE 0 END AS SameStateScore,
  CASE WHEN p.position_city = e.home_city THEN 1 ELSE 0 END AS SameCityScore,
  CASE WHEN d.name = "College Degree" THEN 1 ELSE 0 END AS HasCollegeDegree,
  CASE WHEN n.name = "Management" THEN 1 ELSE 0 END AS HasRequiredSkill
SET e.score = SameStateScore + SameCityScore + HasCollegeDegree + HasRequiredSkill
RETURN DISTINCT e.name,p.name, SameStateScore,SameCityScore,HasCollegeDegree,MAX(HasRequiredSkill) AS HasRequiredSkill, e.score
ORDER BY e.score DESC

回答1:

The link you used in your question (https://neo4j.com/docs/rest-docs/current/#rest-api-property-values) is for the deprecated legacy REST API. If you want to make HTTP requests to execute Cypher, you can use the new HTTP API instead.

In order to have a separate employee score per position, you should not be storing the score in the Employee node, but in the FUTURE_POSITION relationship -- since there is a separate relationship per position. So, just use r.score instead of e.score:

MATCH
  (e:Employee)-[r:FUTURE_POSITION]->(p:Position {open_status:1}),
  (e)-[:HAS_DEGREE]-> (d:Degree),
  (e)-[:HAS_SKILL]-> (n:Personal_Skill)
WITH r, e, p,
  CASE WHEN p.position_state = e.home_state THEN 1 ELSE 0 END AS SameStateScore,
  CASE WHEN p.position_city = e.home_city THEN 1 ELSE 0 END AS SameCityScore,
  CASE WHEN d.name = "College Degree" THEN 1 ELSE 0 END AS HasCollegeDegree,
  CASE WHEN n.name = "Management" THEN 1 ELSE 0 END AS HasRequiredSkill
SET r.score = SameStateScore + SameCityScore + HasCollegeDegree + HasRequiredSkill
RETURN DISTINCT
  e.name, p.name, SameStateScore, SameCityScore, HasCollegeDegree,
  MAX(HasRequiredSkill) AS HasRequiredSkill, r.score
ORDER BY r.score DESC

Also, the DISTINCT option may not be needed, as aggregation functions (like MAX) already make sure the set of non-aggregated values in the same result row are distinct.

来源：https://stackoverflow.com/questions/50843464/how-to-store-properties-of-a-neo4j-node-as-an-array

标签

neo4j

cypher