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spring-data neo4j を使用して、snippet と person の 2 つのノード エンティティがあります。各スニペットには作成者がいます。以下は、クラスと失敗したテストです。

@NodeEntity
public class SnippetLink {
    @GraphId
    @GeneratedValue
    Long id;

    @Fetch
    @RelatedTo(type = "AUTHORED")
    @Indexed
    PersonLink author;

    @RelatedToVia(type = SnippetRelation.DERIVED_FROM)
    SnippetLink parent;

    Long documentId;

    public SnippetLink() {
    }

    public SnippetLink(PersonLink author, Long documentId) {
        this.author = author;
        this.documentId = documentId;
    }

    public PersonLink getAuthor() {
        return author;
    }

    public void setAuthor(PersonLink author) {
        this.author = author;
    }

    public Long getDocumentId() {
        return documentId;
    }

    public void setDocumentId(Long documentId) {
        this.documentId = documentId;
    }

    public SnippetLink getParent() {
        return parent;
    }

    public void setParent(SnippetLink parent) {
        this.parent = parent;
    }

    public SnippetRelation fork(PersonLink author) {
        SnippetLink child = new SnippetLink(author, documentId);
        return new SnippetRelation(this, child, SnippetRelation.Type.Fork);
    }

    public SnippetRelation revision(Long documentId) {
        SnippetLink child = new SnippetLink(getAuthor(), documentId);
        return new SnippetRelation(this, child, SnippetRelation.Type.Revision);
    }
}

.

@NodeEntity
public class PersonLink {
    @GraphId
    Long id;

    String login;

    String firstName;

    String lastName;

    public PersonLink() {
    }

    public PersonLink(String login, String firstName, String lastName) {
        this.login = login;
        this.firstName = firstName;
        this.lastName = lastName;
    }

    public String getLogin() {
        return login;
    }

    public void setLogin(String login) {
        this.login = login;
    }

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }
}

.

public interface SnippetLinkRepository extends GraphRepository<SnippetLink>{
    Iterable<SnippetLink> findByAuthor(PersonLink author);
}

.

PersonLink author = template.save(new PersonLink("johns", "John", "Smith"));

SnippetLink snippet = template.save(new SnippetLink(author, -1L));

SnippetRelation revisionRelation = snippet.revision(-2L);
template.save(revisionRelation.getChild());
template.save(revisionRelation);

Iterable<SnippetLink> snippets = snippetLinkRepository.findByAuthor(author);
assertThat(snippets).hasSize(2);
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1 に答える 1

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@RelatedToVia(type = SnippetRelation.DERIVED_FROM)
SnippetLink parent;

これは

@RelatedTo(type = SnippetRelation.DERIVED_FROM)
SnippetLink parent;

RelatedToVia は、エンティティの関係 (エンティティ) にアクセスする場合に使用されます。ただし、SnippetLink はエンティティであるため、realatedTo を使用する必要があります。

于 2013-08-29T11:13:08.683 に答える