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.
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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.
这篇关于Neo4j双向关系的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！