[英]How to query Neo4j nodes and the relationship between the nodes?
現在我有一個像這樣的圖:
然后我要查詢“ SGJ”“ HAVE”的節點
MATCH (n:User) -[R:MASTER]-> (k:KNode)
WHERE n.username={username}
RETURN k
但是我得到這樣的結果:
{
"id": 360,
"children": null,
"name": "Arrays",
"intro": "this is an intro"
},
{
"id": 300,
"children": null,
"name": "Java",
"intro": "this is an intro"
}
這些節點之間的關系剛消失了,希望我可以查詢與該關系的節點仍然像:
{
"id": 360,
"children": [
{
"id": 300,
"children": null,
"name": "Java",
"intro": "this is an intro"
}
],
"name": "Arrays",
"intro": "this is an intro"
}
這是實體定義:
@Data
@NodeEntity
public class KNode {
@GraphId
Long id;
@Relationship(type = "BELONGS_TO", direction = Relationship.INCOMING)
List<KNode> children;
private String name;
private String intro;
}
有什么解決辦法嗎? 謝謝。
您只是返回一個節點而不是路徑。 請嘗試以下請求之一以返回孩子和親戚:
MATCH (n:User) -[R:MASTER]-> (k:KNode)
WHERE n.username={username}
OPIONAL MATCH p=(k)-[r]-(c)
RETURN p
要么 :
MATCH (n:User) -[R:MASTER]-> (k:KNode)
WHERE n.username={username}
WITH k
MATCH p=(k)-[r]-(c)
RETURN p
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