SDN 4 不与属性建立关系

Question

我是 Neo4J 的新手。我建立了一个使用 spring-data-neo4j（4.0.0.BUILD-SNAPSHOT - 版本），spring-boot（1.2.3.RELEASE - 版本）并成功的项目创建节点实体，向节点实体添加属性并添加关系。它工作正常。现在我想为关系创建属性。我用sdn4大学作为参考，这里是link https://github.com/neo4j-examples/sdn4-university .

我想为关系 PLAY_MATCH 创建一个名为 "challengedBy" 的属性（开始节点是 Match，结束节点是 Player）。你可以看看下面class.

@RelationshipEntity(type = "PLAY_MATCH")
public class PlayMatch extends Entity {
//Entity is a class with the id property for the node / relationship 
@Property
private String challengedBy;

@StartNode
private Match match;

@EndNode
private Player player1;

}

我在项目中创建了一个控制器 /api/playmatch 来创建比赛和球员之间的关系。因此，当我传递现有匹配节点和播放器节点的值时，根本不会创建关系。

任何帮助将不胜感激..

PlayMatch 代码是

@RelationshipEntity(type = "PLAY_MATCH")
public class PlayMatch extends Entity{

@Property
private String challengedBy;

@StartNode
private Match match;

@EndNode
private Player player1;

public PlayMatch() {

}
public PlayMatch(String challengedBy, Match match,
        Player player1) {
    super();
    this.challengedBy = challengedBy;
    this.match = match;
    this.player1 = player1;
}

// after this i have getters  & setters and toString method for above fields.
}

匹配代码是

@NodeEntity(label = "Match")
public class Match extends Entity {

private String createdBy;
private Long createdTime;
private String status;
private int noOfGames;
private int noOfPoints;
private String type;
private Long date;

@Relationship(type="PLAY_MATCH",direction= Relationship.UNDIRECTED)
private PlayMatch playMatch;

public Match() {

}   

public Match(String createdBy, Long createdTime, String status,
    int noOfGames, int noOfPoints, String type, Long date) {
    super();
    this.createdBy = createdBy;
    this.createdTime = createdTime;
    this.status = status;
    this.noOfGames = noOfGames;
    this.noOfPoints = noOfPoints;
    this.type = type;
    this.date = date;
}

public PlayMatch getPlayMatch() {
    return playMatch;
}

public void setPlayMatch(PlayMatch playMatch) {
    this.playMatch = playMatch;
}
// after this i have getters  & setters and toString method for above fields.

}

玩家代码是

@NodeEntity(label = "Player")
public class Player extends Entity {

private String address;
private String preferredSport;
private float height;
private float weight;
private String phone;
private String photo;

@Relationship(type="PLAY_MATCH")
private PlayMatch playMatch;

public PlayMatch getPlayMatch() {
    return playMatch;
}

public void setPlayMatch(PlayMatch playMatch) {
    this.playMatch = playMatch;
}

public Player() {
}

public Player(String address, String preferredSport, float height,
    float weight, String phone, String photo) {
    super();
    this.address = address;
    this.preferredSport = preferredSport;
    this.height = height;
    this.weight = weight;
    this.phone = phone;
    this.photo = photo;
}

// after this i have getters  & setters and toString method for above fields.
}

Answer 1

我认为你在玩家端节点内也有比赛关系。如果在player节点中注释下面的代码。它应该工作。我还附上了一个 json 示例，以从匹配 URL (/api/match) 中的 UI 传递，而不是 (/api/playmatch)

@Relationship(type="PLAY_MATCH")
private PlayMatch playMatch;

public PlayMatch getPlayMatch() {
    return playMatch;
}

public void setPlayMatch(PlayMatch playMatch) {
    this.playMatch = playMatch;
}

样本JSON

{
    "type": "typename",
    "status": "statusname",
  "createdTime": 1435928223021,
    "noOfGames": 5,
    "noOfPoints": 19,
  "playMatch": {"challengedBy" : "John", "player1" : {"id":732}, "match":{"type": "typename",
    "status": "statusname",
  "createdTime": 1435928223021,
    "noOfGames": 5,
    "noOfPoints": 19}}
}

这应该创建一个新的比赛，并与属性 challengedBy 建立新的关系到一个 ID 为 732 的现有玩家节点。

检查一下，如果有效请告诉我。

SDN 4 不与属性建立关系

SDN 4 doesn't create relationship with properties

neo4j

spring-data-neo4j

spring-data-neo4j-4