Neo4j - 如何显示连接到相关节点属性的节点图

Question

我有节点 Customer 和 Product - 具有从 Customer 到 Product 的定向关系 TRANSACTION。 产品具有 属性 category.

是否可以显示与他们购买的所有类别相关联的所有客户？就好像类别是一个节点而不是 属性.

Answer 1

您可以使用APOC Virtual Nodes and Relationships来显示这样的图表：

MATCH (n:Product)<-[:TRANSACTION]-(c:Customer)
WITH n.category AS category, c, count(*) AS numberOfPurchases
WITH 
apoc.create.vNode(['Category'], {name: category}) AS catNode,
c,
numberOfPurchases
RETURN catNode, c, 
apoc.create.vRelationship(c, 'PURCHASED_IN_CATEGORY', {amount: numberOfPurchases}, catNode) AS rel