Neo4j:Spring Data Neo4j中的本机Java API(或等效密码查询) [英] Neo4j: Native Java API(or equivalent cypher query) in Spring Data Neo4j

问题描述

过去几天，我正在尝试使用Neo4j Embedded-db进行DEMO，并且对Native Java API的索引，Lucene查询甚至是模糊搜索的印象深刻.然后，我决定将这个POC与Spring Data Neo4j 4.0一起投入生产，但是遇到了Cypher查询和模糊搜索的问题.

I was experimenting with Neo4j embedded-db in the past few days for a DEMO and was thoroughly impressed with the Native Java API's for indexing, lucene queries and even managed to do fuzzy search. I then decided to take this POC to production with Spring Data Neo4j 4.0 but ran into issues with Cypher queries and fuzzy search.

我的域类"Team"看起来像这样:

My domain class "Team" looks like this:

@NodeEntity public class Team {

@GraphId Long nodeId;

/** The team name. */
@Indexed(indexType = IndexType.FULLTEXT,indexName = "teamName")
private String teamName;

public Team(){};

public Team(String name){
    this.teamName = name;
}

public void setTeamName(String name){
    this.teamName = name;
}

public String getTeamName(){
    return this.teamName;
}
}

我正在如下填充数据库:

I am populating my database as follows:

Team lakers = new Team("Los Angeles Lakers");
Team clippers = new Team("Los Angeles Clippers of Anaheim");
Team warriors = new Team("Golden State Warriors");
Team slappers = new Team("Los Angeles Slappers of Anaheim");
Team slippers = new Team("Los Angeles Slippers of Anaheim");

    Transaction tx = graphDatabase.beginTx();
    try{

        teamRepository.save(lakers);
        teamRepository.save(clippers);
        teamRepository.save(warriors);
        teamRepository.save(slappers);
        teamRepository.save(slippers);
    }

我的TeamRepository界面如下:

My TeamRepository interface looks like this:

public interface TeamRepository extends CrudRepository<Team, String>
{
    @Query("MATCH (team:Team) WHERE team.teamName=~{0} RETURN team")
    List<Team> findByTeamName(String query);

}

我的查询如下:

List<Team> teams = teamRepository.findByTeamName("The Los Angeles Will be Playing in a state of Golden");

上面的CYPHER查询不返回任何内容.

The above CYPHER query DOES NOT return anything.

我希望能够像下面的那样在Spring中进行本机Java API类型查询并获得以下结果.(teamIndex是我在团队名称上创建的全文本搜索索引)

I'd like to be able to do a Native Java API type query in Spring like the one below and get the following result.(teamIndex was a full text search index I had created on team names)

IndexHits<Node> found = teamIndex.query("Team-Names",queryString+"~0.5");.

找到了本机JAVA API:

Native JAVA API found:

• 洛杉矶湖人队
• 阿纳海姆洛杉矶快船队
• 金州勇士
• 阿纳海姆的洛杉矶拍手
• 阿纳海姆的洛杉矶拖鞋

推荐答案

您正在寻找的是SDN3

What you are looking for is in SDN3

SDN4不支持@Indexed.

SDN4 doesn't support @Indexed.

有一个带有一些其他查询方法的IndexRepository，但您也可以像这样使用cypher:

There is an IndexRepository with some additional query methods but you can also use cypher like this:

public interface TeamRepository extends GraphRepository<Team>
{
    @Query("start team=node:teamName({0}) RETURN team")
    List<Team> findByTeamName(String query);
}

哪个会将索引查询发送给Lucene.

Which will send the index-query to Lucene.

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