对于JPA中的外键主对象详细ID

我有三个表，其中一个是（场景），它是主表，两个其他表（链接，节点）是它的细节。我想JPA坚持外键为我坚持情景链接和节点表中没有我的干预，有没有人帮我做到这一点？对于JPA中的外键主对象详细ID

场景：

@Entity 
@NamedQueries({ @NamedQuery(name = "Scenario.findAll", query = "select o from Scenario o") }) 
public class Scenario implements Serializable { 
private String className; 
@Id 
@Column(nullable = false,name="ID") 
private int id; 
private String linkFromPortIdProperty; 
private String linkToPortIdProperty; 
private String UUID; 
@OneToMany(mappedBy = "scenario", cascade = { CascadeType.PERSIST, CascadeType.MERGE }) 
private List<Link> linkDataArray; 
@OneToMany(mappedBy = "scenario1", cascade = { CascadeType.PERSIST, CascadeType.MERGE }) 
private List<Node> nodeDataArray;

链接：

@Entity 
@NamedQueries({ @NamedQuery(name = "Lnk.findAll", query = "select o from Link o") }) 
@Table(name = "LNK", schema = "DEV_SGMNT") 

public class Link implements Serializable { 
private static final long serialVersionUID = -5262332521707870082L; 


@Transient 
private String to; 
private int fromPort; 
@Id 
@Column(nullable = false) 
private int id; 
private double[] points; 
@Transient 
private String from; 
private int toPort; 
@ManyToOne 
@JoinColumn(name = "SCENARIO_ID") 
private Scenario scenario;

节点：

@Entity 
@NamedQueries({ @NamedQuery(name = "Node.findAll", query = "select o from Node o") }) 
public class Node implements Serializable { 
private static final long serialVersionUID = -8401815303355236645L; 
private String classname; 
@Id 
@Column(nullable = false) 
private int id; 
private BigDecimal inbound; 
private String key; 
private BigDecimal outbound; 
private String properties; 
private String tab; 
private String text; 
private String vizitems; 
@ManyToOne 
@JoinColumn(name = "SCENARIO_ID") 
private Scenario scenario1;

来源

2017-09-02 khashayar

我想我明白你的'不intervention'的意思。但是，为了清楚起见，我建议您在代码片段中添加用于保存'... persist（链接）'的代码以及数据库中的预期结果。 – alexbt

使用CascadeType.ALL您要PERSI所有细节对象st当主实体（Scenario）持续时。

@OneToMany(mappedBy = "scenario",cascade = CascadeType.ALL, orphanRemoval = true) 
private List<Link> linkDataArray;

阅读本指南由vladmihalcea写：

Reference

来源

2017-09-04 09:33:24

对于JPA中的外键主对象详细ID

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