Question

上下文： Java应用程序，带有Spring Boot，后端为neo4j，前端为angular 5。

要解决的问题：当我保存一个与其他美国实例可能具有三种不同关系类型的美国对象时，它将删除其孩子的关系示例：

US1
US2
US3

US2 与 US3 同步。如果我将 US1 放在 US3 之前 US2 和 US3 之间的关系将消失。

问题是是否存在防止这种情况的配置或方法？

已编辑：

@Component
@NodeEntity(label = UniteStratigraphique.LABEL)
public class UniteStratigraphique extends NeoModel {

private static final long serialVersionUID = 1L;
public static final String NAME = "us";
public static final String LABEL = "US";
public static final String IS_SYNCHRONOUS = "EST_SYNCHRONE";
public static final String IS_PREVIOUS = "EST_ANTERIEURE";
public static final String IS_LOCATED_ON = "EST_SITUEE_SUR";
public static final String HAS_A_PHASE = "EST_ASSOCIE_A";
private static final String IS_COLLECTED_ON = "EST_RECUEILLI_SUR";


@NotNull
@Index(unique=true) 
@Pattern(regexp="^.*\\.[0-9]{1,4}$")
private String identification;

@Length(min = 0, max = 500)
private String description;

@Length(min = 0, max = 500)
private String comment;//commentaire

@Relationship(type = HAS_A_PHASE,  direction = Relationship.OUTGOING )
private Phase phase;

@NotNull
@Relationship(type = IS_LOCATED_ON, direction = Relationship.OUTGOING)
private Chantier chantier;

@DateTimeFormat(pattern = "dd/MM/yyyy", iso = ISO.DATE)
private Date beginningDate;

@DateTimeFormat(pattern = "dd/MM/yyyy", iso = ISO.DATE)
private Date endDate;

private String type;

@Length(min = 0, max = 4)
private String longueur;

@Length(min = 0, max = 4)
private String largeur;

private String coordonneeLambertX;

private String coordonneeLambertY;


@JsonSerialize(using = UsListRelationSerializer.class)
@Relationship(type = IS_SYNCHRONOUS, direction = Relationship.UNDIRECTED)
private Set<UniteStratigraphique> usSynchrones;


@JsonSerialize(using = UsListRelationSerializer.class)
@Relationship(type = IS_PREVIOUS, direction = Relationship.INCOMING)
private Set<UniteStratigraphique> usAnterieures;


@JsonSerialize(using = UsListRelationSerializer.class)
@Relationship(type = IS_PREVIOUS, direction = Relationship.OUTGOING)
private Set<UniteStratigraphique> usPosterieures;


@JsonIdentityInfo(generator=ObjectIdGenerators.PropertyGenerator.class, property="id")
@Relationship(type = ElementRecueilli.IS_COLLECTED_ON, direction = Relationship.INCOMING)
private Set<ElementRecueilli> ers;

public Phase getPhase() {
    return phase;
}

public void setPhase(Phase phase) {
    this.phase = phase;
}


public String getIdentification() {
    return identification;
}

public void setIdentification(String identification) {
    this.identification = identification;
}

public String getDescription() {
    return description;
}

public void setDescription(String description) {
    this.description = description;
}

public String getComment() {
    return comment;
}

public void setComment(String comment) {
    this.comment = comment;
}

public Chantier getChantier() {
    return chantier;
}

public void setChantier(Chantier chantier) {
    this.chantier = chantier;
}

public Date getBeginningDate() {
    return beginningDate;
}

public void setBeginningDate(Date beginningDate) {
    this.beginningDate = beginningDate;
}

public Date getEndDate() {
    return endDate;
}

public void setEndDate(Date endDate) {
    this.endDate = endDate;
}

public Set<UniteStratigraphique> getUsSynchrones() {
    if (usSynchrones == null)
        usSynchrones = new HashSet<>();
    return usSynchrones;
}

public void setUsSynchrones(Set<UniteStratigraphique> usSynchrones) {
    this.usSynchrones = usSynchrones;
}

public Set<UniteStratigraphique> getUsAnterieures() {
    if (usAnterieures == null)
        usAnterieures = new HashSet<>();
    return usAnterieures;
}

public void setUsAnterieures(Set<UniteStratigraphique> usAnterieures) {
    this.usAnterieures = usAnterieures;
}

public Set<UniteStratigraphique> getUsPosterieures() {
    if (usPosterieures == null)
        usPosterieures = new HashSet<>();
    return usPosterieures;
}

public void setUsPosterieures(Set<UniteStratigraphique> usPosterieures) {
    this.usPosterieures = usPosterieures;
}

public void setErs(Set<ElementRecueilli> ers) {
    this.ers = ers;
}

public Set<ElementRecueilli> getErs() {
    if (ers == null)
        ers = new HashSet<>();
    return ers;
}

@Override
public String getLabel() {
    // TODO Auto-generated method stub
    return UniteStratigraphique.LABEL;
}

@Override
public String getName() {
    // TODO Auto-generated method stub
    return NAME;
}

public String getType() {
    return type;
}

public void setType(String type) {
    this.type = type;
}
//////other getter and setter

Neo4J-春季靴子

0 个答案: