apoc.graph.filterProperties

过程 Apoc 扩展

CALL apoc.graph.filterProperties(anyEntityObject, nodePropertiesToRemove, relPropertiesToRemove) YIELD nodes, relationships

Returns a set of virtual nodes and relationships without the properties defined in nodePropertiesToRemove and relPropertiesToRemove

签名

apoc.graph.filterProperties(value :: ANY?, nodePropertiesToRemove = {} :: MAP?  , relPropertiesToRemove = {} :: MAP?) :: ANY?

输出参数

名称	类型
节点	节点列表？
relationships	关系列表？

名称

类型

节点

节点列表？

relationships

关系列表？

nodePropertiesToRemove 和 relPropertiesToRemove 参数是映射表，其键为标签/关系类型，值为要从虚拟实体中移除的属性列表。这两个参数的键也可以设为 _all，这意味着每个标签/关系类型的属性都会被过滤。

使用示例

假设有以下数据集

CREATE (:Person {name: "foo", plotEmbedding: "11"})-[:REL {idRel: 1, posterEmbedding: "33"}]->(:Movie {name: "bar", plotEmbedding: "22"}),
                 (:Person {name: "baz", plotEmbedding: "33"})-[:REL {idRel: 1, posterEmbedding: "66"}]->(:Movie {name: "ajeje", plotEmbedding: "44"})

我们可以执行

MATCH path=(:Person)-[:REL]->(:Movie)
WITH collect(path) AS paths
CALL apoc.graph.filterProperties(paths, {Movie: ['posterEmbedding'], Person: ['posterEmbedding', 'plotEmbedding', 'plot', 'bio']})
YIELD nodes, relationships
RETURN nodes, relationships

表 1. 结果
节点	relationships
[(:Person {name: "1"}), (:Movie {name: "bar"}), (:Movie {title: "1",tmdbId: "ajeje"}), (:Person {name: "baz"}), (:Person {name: "uno"}), (:Movie {name: "ajeje"}), (:Movie {title: "1",tmdbId: "due"}), (:Movie {title: "1",tmdbId: "ajeje"}), (:Person {name: "1"}), (:Movie {title: "1",tmdbId: "ajeje"}), (:Person {name: "foo"}), (:Person {name: "1"})]	[[:REL], [:REL {idRel: 1}], [:REL {idRel: 1}], [:REL], [:REL], [:REL]]│

或

MATCH path=(:Person)-[:REL]->(:Movie)
WITH collect(path) AS paths
CALL apoc.graph.filterProperties(paths, {_all: ['plotEmbedding', 'posterEmbedding', 'plot', 'bio']})
YIELD nodes, relationships
RETURN nodes, relationships

结果与上述相同。