Neo4j双向关系 [英] Neo4j Bidirectional Relationship

问题描述

是否可以使用Cypher在Neo4j中创建双向关系?我希望该关系是双向的，而不是在两个方向上都建立两个单向关系，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)

先谢谢您了:)

推荐答案

不，没有. neo4j中的所有关系都有一个方向，在给定节点处开始和结束.

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，正如您所建议的，我们可以有两种关系，一种从A到B，另一种从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，当编写我们的MATCH查询时，我们可以使用

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

它不会在乎A是否是B的朋友，反之亦然，并且允许我们在建立关系时随意选择一个方向.

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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