春季数据@字段查询

只有当我从数据库中检索实体时,属性上的@Query才会检索值。

@NodeEntity
public class Team
{
    @GraphId
    private Long nodeId;

    @RelatedTo (type = "PREVIOUSLY_KNOWN_AS")
    private Team previouslyKnownAs;

    @Query ("START t=node({self}) MATCH t-[:PREVIOUSLY_KNOWN_AS]-other RETURN other")
        private Iterable<Team> aliases;
}

只有当我取消对该行的注释以从数据库中显式读取该行时,下面的测试才有效。为什么有必要?我看到查询在 save(t) 但是 alias 字段为 null 如果我没有通过取消对该行的注释从DB中读取它

@Test
public void alias()
{
    Team t = new Team();
    t.setName("Alpharetta One");

    Team prev = new Team();
    prev.setName("Previous Name");
    teamRepo.save(prev);

    t.setPreviouslyKnownAs(prev);
    teamRepo.save(t);

    //t = teamRepo.findOne(t.getNodeId());//only works if I uncomment
    assertNotNull(t.getAliases());
}