查找未设置属性的Neo4j节点 [英] Find Neo4j nodes where the property is not set

问题描述

使用Cypher，如何找到不存在属性的节点?

Using Cypher, how can I find a node where a property doesn't exist?

例如，我有两个节点:

A = {foo: true, name: 'A'},  B = { name: 'B'}

现在，我想找到B，并根据未设置foo属性的情况选择它.我该怎么办?

Now I'd like to find B, selecting it on the basis of not having the foo property set. How can I do this?

推荐答案

正如迈克尔·亨格(Michael Hunger)所述

As Michael Hunger mentioned

MATCH (n) WHERE NOT EXISTS(n.foo) RETURN n

在Neo4j的旧版本上，您可以使用HAS:

On older versions of Neo4j you can use HAS:

# Causes error with later versions of Neo4j
MATCH (n) WHERE NOT HAS(n.foo) RETURN n

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