Find Neo4j nodes where the property is not set

Question

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

For example, I have two nodes:

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

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

Answer 1

MATCH (f) WHERE f.foo IS NULL RETURN f

Answer 2

As of version 4.3 EXISTS has been deprecated on properties and instead, you should use IS NOT NULL.

So for the example in your question your query would now be:

MATCH (n) WHERE n.foo IS NULL RETURN n