Relationship properties not able to get

[Hashdhi]

Schema

type Person {
  name: String
  age: Int
  livesIn : Location @relation(name:"LIVES_IN", direction: OUT)
  livedIn : [Location] @relation(name:"LIVED_IN", direction: OUT)
  born : Birth
  died : Death
}
interface Temporal {
  date: String
}
type Birth implements Temporal @relation(name:"BORN") {
  from: Person
  to: Location
  date: String
}
type Death implements Temporal @relation(name:"DIED",from:"who",to:"where") {
  who: Person
  where: Location
  date: String
}
interface Location {
  name: String
  founded: Person @relation(name:"FOUNDED", direction: IN)
  sort_Arg: String
}
type City implements Location {
  name: String
  founded: Person @relation(name:"FOUNDED", direction: IN)
  sort_Arg: String
  city_Arg: String
}
type Village implements Location {
  name: String
  founded: Person @relation(name:"FOUNDED", direction: IN)
  sort_Arg: String
  villageArg: String
}

there are two problems

1. Unable to get only Relationship Property

query {
  persons{
      born{
          date
      }
  }
}

Cypher

MATCH (persons:Person)
CALL {
	WITH persons
	OPTIONAL MATCH (persons)-[personsBorn:BORN]->(personsBornTo:Location)
	RETURN personsBorn {
		.date
	} AS personsBorn LIMIT 1
}
RETURN persons {
	born: personsBorn
} AS persons

issue is there is no Location node . Location is interface .

2. query interface

query {
  persons{
      born{
          date
          to {
              name
          }
      }
  }
}

MATCH (persons:Person)
CALL {
	WITH persons
	OPTIONAL MATCH (persons)-[personsBorn:BORN]->(personsBornTo:Location)
	RETURN personsBorn {
		.date,
		to: personsBornTo {
			.name,
			__typename: head([label IN labels(personsBornTo) WHERE label IN $personsBornToValidTypes])
		}
	} AS personsBorn LIMIT 1
}
RETURN persons {
	born: personsBorn
} AS persons

replaced param : personsBornToValidTypes=[City, Village]

Neo4j db version 4.4.3 lib version : 1.6.0

Test data :

CREATE
  (u1:Person {name: 'Hashi',age:10})

CREATE
  (u1:City {name: 'Bangalore'})
  
CREATE (a)-[r:BORN{date:'23-12-2013'}]->(b)
RETURN type(r), r.date

Two node [Person,City] one Relationship BORN