我不确定如何编写neo4j查询来查找所有节点(包括最短路径中的标签),并在输出中按标签对它们进行分组。
编辑:最短路径包括标签->文件-> SubDirs-> SourceDir之间的链接,我希望所有这些链接。
这种neo4j语法在某处是错误的,但这基本上就是我要返回到我的java spring代码的原因
MATCH (a:Tag),(b:File),(c:SourceDir),
path = shortestPath((a)-[*]->(c))
WHERE a.name=~('(?i).*'+"READ"+'.*')
FOREACH (n IN NODES(path) |
WHERE label(n) = "SubDir" as dir |
WHERE label(n) = "SourceDir" as src |
WHERE label(n) = "File" as file |
WHERE label(n) = "Tag" as tag)
RETURN COLLECT(dir) as dirs, src as source, COLLECT(file) as file, COLLECT(tag) as tags
java语法部分如下所示,它由neo4j查询和结果组成
@Query("MATCH (a:Tag),(b:File),(c:SourceDir), "
+ "path = shortestPath((a)-[*]->(c)) "
+ "WHERE a.name=~('(?i).*'+{search}+'.*') "
+ "FOREACH (n IN NODES(path) | "
+ "WHERE label(n) = 'SubDir' as dir | "
+ "WHERE label(n) = 'SourceDir' as src | "
+ "WHERE label(n) = 'File' as file | "
+ "WHERE label(n) = 'Tag' as tag) "
+ "RETURN COLLECT(dir) as dirs, src as source, COLLECT(file) as files, COLLECT(tag) as tags)")
public List<ResultData> findByTag(@Param("search") String search);
@QueryResult
public class ResultData
{
Set<File> files;
Set<Directory> dirs;
Source source;
Set<Tag> tags;
}
什么是neo4j正确的查询才能给我带来预期的结果?
答案 0 :(得分:0)
这可能对您有用:
50.35
注意:一个节点可以有多个标签,因此上面的查询将检查每个节点的每个标签。