在neo4j中创建具有唯一属性（ID除外）的节点

Question

我的项目是基于SpringBootNeo4J的。我正在尝试创建一个新的特权节点，但不想复制特权。

现在我有一个UserRole节点，它是holdsList

下面是我的域类。

UserRole类

 @NodeEntity
public class UserRole {

    public UserRole(User user, Role role) {
        this.user = user;
        this.role = role;
    }

    /**
     For Jackson Parsing
     **/
    public UserRole() {
    }

    @GraphId
    private Long id;

    public UserRole(User user, Role role, Unit unit) {
        this.user = user;
        this.role = role;
        this.unit = unit;
    }



    public long getId() {
        return id;
    }

    @Relationship(type = HAS_USERROLE,direction = "OUTGOING")
    User user;
    public User getUser() {
        return user;
    }

    @Relationship (type = HAS_ROLE_OF,direction = "OUTGOING")
    Role role;
    public Role getRole() {
        return role;
    }


    @Relationship(type = "WORKS_IN",direction = "OUTGOING")
    Unit unit;

    public Unit getUnit() {
        return unit;
    }

    public void setUnit(Unit unit) {
        this.unit = unit;
    }

    @Relationship(type = "HAS_PRIVILEDGE", direction = "OUTGOING")
    List<Priviledge> priviledgeList;

    public List<Priviledge> getPriviledgeList() {
        return priviledgeList;
    }

     public void setPriviledgeList(List<Priviledge> priviledgeList) {
        this.priviledgeList = priviledgeList;
      }
    }

特权等级

  @GraphId
    Long id;


    private String priviledge;

    private String priviledgeOn;
    private Long priviledgeOnId;

    public Priviledge() {
    }

    public Priviledge(String priviledge, String priviledgeOn) {
        this.priviledge = priviledge;
        this.priviledgeOn = priviledgeOn;
    }

    public Long getId() {
        return id;
    }

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

    public String getPriviledge() {
        return priviledge;
    }

    public void setPriviledge(String priviledge) {
        this.priviledge = priviledge;
    }

    public String getPriviledgeOn() {
        return priviledgeOn;
    }

    public void setPriviledgeOn(String priviledgeOn) {
        this.priviledgeOn = priviledgeOn;
    }

    public Long getPriviledgeOnId() {
        return priviledgeOnId;
    }

    public void setPriviledgeOnId(Long priviledgeOnId) {
        this.priviledgeOnId = priviledgeOnId;
      }
    }

我正在使用GraphRespository保存实体。




Answer 1

当前执行此操作的唯一方法是首先查询现有的特权，如果没有，则创建它，如果有，则使用它。还添加了一个唯一的约束以确保安全。

在未来的版本中，将支持此用例。