Neo4j 双向关系 [英] Neo4j Bidirectional Relationship

问题描述

有没有办法使用 Cypher 在 Neo4j 中创建双向关系?我希望关系是双向的，而不是在两个方向上建立两个单向关系例如:

Is there a way to create bidirectional relationship in Neo4j using Cypher? I would like the relationship to be bidirectional rather than making two unidirectional relationships in both directions For eg:

(A)<-[FRIEND]->(B)

而不是:

(A)-[FRIEND]->(B)
(A)<-[FRIEND]-(B)

提前致谢:)

推荐答案

不，没有.neo4j 中的所有关系都有一个方向，从给定节点开始和结束.

No, there isn't. All relationships in neo4j have a direction, starting and ending at a given node.

有少量解决方法.

• 首先，正如你所建议的，我们可以有两种关系，一种是从 A 到 B，另一种是从 B 到 A.

• Firstly, as you've suggested, we can either have two relationships, one going from A to B and the other from B to A.

或者，在编写 MATCH 查询时，我们可以指定无方向地匹配模式，通过使用诸如

Alternatively, when writing our MATCH query, we can specify to match patterns directionlessly, by using a query such as

MATCH (A)-[FRIEND]-(B) RETURN A, B

不会关心A和B是不是朋友，反之亦然，允许我们在建立关系时任意选择方向.

which will not care about whether A is friends with B or vice versa, and allows us to choose a direction arbitrarily when we create the relationship.

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