Spring Data Neo4j 4 - findById(Long id) return null

Question

I am using SDN 4 and neo4j-ogm 1.1.4

I am trying to fetch my data using findById(Long id) GraphRepository, but always return null. After that I am trying to use findByName(String name) and its worked. I know there is alternative using findOne(Long id, int depth), but when I want to make custom query, for example findByObjectId(Long id), it will be trouble.

After try manual query at neo4j, it return null too. So any issue about this ?

@NodeEntity
public class Fetch1 {

    @GraphId Long id;

    private String name;

    @Relationship(type="HAS_FETCH2")
    @JsonIgnore
    private List<Fetch2> fetch2;

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

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

    @Relationship(type="HAS_FETCH2")
    @JsonIgnore
    public List<Fetch2> getFetch2() {
        return fetch2;
    }

    @Relationship(type="HAS_FETCH2")
    @JsonIgnore
    public void setFetch2(List<Fetch2> fetch2) {
        this.fetch2 = fetch2;
    }

    @Override
    public String toString() {
        return "Fetch1 [id=" + id + ", name=" + name + ", fetch2=" + fetch2 + "]";
    }
}

@NodeEntity
public class Fetch2 {

    @GraphId Long id;

    private String name;

    @Relationship(type="HAS_FETCH2", direction=Relationship.INCOMING)
    @JsonIgnore
    private Fetch1 fetch1;

    @Relationship(type="HAS_FETCH3")
    @JsonIgnore
    private List<Fetch3> fetch3;

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

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

    @Relationship(type="HAS_FETCH2", direction=Relationship.INCOMING)
    @JsonIgnore
    public Fetch1 getFetch1() {
        return fetch1;
    }

    @Relationship(type="HAS_FETCH2", direction=Relationship.INCOMING)
    @JsonIgnore
    public void setFetch1(Fetch1 fetch1) {
        this.fetch1 = fetch1;
    }

    @Relationship(type="HAS_FETCH3")
    @JsonIgnore
    public List<Fetch3> getFetch3() {
        return fetch3;
    }

    @Relationship(type="HAS_FETCH3")
    @JsonIgnore
    public void setFetch3(List<Fetch3> fetch3) {
        this.fetch3 = fetch3;
    }

    @Override
    public String toString() {
        return "Fetch2 [id=" + id + ", name=" + name + ", fetch1=" + fetch1 + ", fetch3=" + fetch3 + "]";
    }    
}

And this is my Repository

public interface Fetch1Repository extends GraphRepository<Fetch1>{

    Fetch1 findById(Long id);
    Fetch1 findByFetch2Id(Long id);
    Fetch1 findByFetch2Name(String name);
}

Vince Vince · Accepted Answer · 2016-01-14T09:55:29

In this case, findById won't work the way you expect, because the id is not a node property in the graph, and findByXXX looks for properties.

In Cypher, the difference is:

MATCH (n) WHERE id(n) = .... // find by id

MATCH (n {n.name = "Steve Jobs" }) ... // find by property

Just use findOne(id) or findOne(id, depth).

Spring Data Neo4j 4 - findById(Long id) return null

1 Answers