Neo4j Cypher pattern comprehension -

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this neo4j sandbox query tests:

neo4j browser: https://10-0-1-223-34371.neo4jsandbox.com/  direct neo4j http: http://54.89.60.35:34371/browser/  username: neo4j password: capacities-complement-deputies ip address: 54.89.60.35 http port: 34371 bolt port: 34370

i have following cypher query:

match (parentd)<-[:defined_by]-(ch1:characteristic)<-[v1:has_value_on]-(childd)   not (ch1)<-[:depends_on]-() , parentd.id = 1  return v1

which correctly returns following data(1 record):

{   "totalhistoryvalues": 0,   "available": true,   "description": "integer value 1",   "value": 10 }

but inside of following query pattern comprehension:

match (parentd)-[:contains]->(childd:decision)  parentd.id = 1  * match (childd)-[ru:created_by]->(u:user)  optional match (childd)-[rup:updated_by]->(up:user)   ru, u, rup, up, childd   skip 0 limit 100  return ru, u, rup, up, childd decision,  [ (parentd)<-[:defined_by]-(entity)<-[:commented_on]-(comg:commentgroup)-[:commented_for]->(childd)  | {entityid: toint(entity.id),  types: labels(entity), totalcomments: toint(comg.totalcomments)} ] commentgroups,  [ (parentd)<-[:defined_by]-(c1)<-[vg1:has_vote_on]-(childd)  | {criterionid: toint(c1.id),  weight: vg1.avgvotesweight, totalvotes: toint(vg1.totalvotes)} ] weightedcriteria,  [ (parentd)<-[:defined_by]-(ch1:characteristic)<-[v1:has_value_on]-(childd)   not ((ch1)<-[:depends_on]-())   | {characteristicid: toint(ch1.id),  value: v1.value, available: v1.available, totalhistoryvalues: v1.totalhistoryvalues, description: v1.description, valuetype: ch1.valuetype, visualmode: ch1.visualmode} ] valuedcharacteristics,  [ (childd)-[rdt:belongs_to]->(t:tag)  | t ] tags

valuedcharacteristics accidentally contains 2 values:

{   "totalhistoryvalues": 0,   "description": "integer value 2",   "valuetype": "integer",   "characteristicid": 2,   "available": true,   "visualmode": "integerrangeslider",   "value": 20 }  ,  {   "totalhistoryvalues": 0,   "description": "integer value 1",   "valuetype": "integer",   "characteristicid": 1,   "available": true,   "visualmode": "integerrangeslider",   "value": 10 }

what wrong part of query:

 [ (parentd)<-[:defined_by]-(ch1:characteristic)<-[v1:has_value_on]-(childd)   not ((ch1)<-[:depends_on]-())       | {characteristicid: toint(ch1.id),  value: v1.value, available: v1.available, totalhistoryvalues: v1.totalhistoryvalues, description: v1.description, valuetype: ch1.valuetype, visualmode: ch1.visualmode} ] valuedcharacteristics

and how fix in order return correct single record (because value#2 set characteristic parent(id=2)and should not present here)?

you should pass parentd next context in with. since you're not doing this, parentd variable used on pattern comprehension not binded parentd.id = 1. parentd matching possible nodes. change query to:

match (parentd)-[:contains]->(childd:decision)  parentd.id = 1  * match (childd)-[ru:created_by]->(u:user)  optional match (childd)-[rup:updated_by]->(up:user)   ru, u, rup, up, childd, parentd   skip 0 limit 100  return ru, u, rup, up, childd decision,  [ (parentd)<-[:defined_by]-(entity)<-[:commented_on]-(comg:commentgroup)-[:commented_for]->(childd)  | {entityid: toint(entity.id),  types: labels(entity), totalcomments: toint(comg.totalcomments)} ] commentgroups,  [ (parentd)<-[:defined_by]-(c1)<-[vg1:has_vote_on]-(childd)  | {criterionid: toint(c1.id),  weight: vg1.avgvotesweight, totalvotes: toint(vg1.totalvotes)} ] weightedcriteria,  [ (parentd)<-[:defined_by]-(ch1:characteristic)<-[v1:has_value_on]-(childd)   not ((ch1)<-[:depends_on]-())   | {characteristicid: toint(ch1.id),  value: v1.value, available: v1.available, totalhistoryvalues: v1.totalhistoryvalues, description: v1.description, valuetype: ch1.valuetype, visualmode: ch1.visualmode} ] valuedcharacteristics,  [ (childd)-[rdt:belongs_to]->(t:tag)  | t ] tags




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