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我在创建具有对象引用的JPA复合关键字时遇到了一些问题。实体是如显示在波纹管,具有对象引用的JPA复合关键字
1)I湾,以除去从工作流实体的ID字段和制成一复合物键相结合SEQNO字段和模板(对象引用)字段
2 )根据更改更新现有的关系命令实体(@JoinColumn(name =“WORKFLOW_ID”,referencedColumnName =“ID”))
谢谢。
模板实体:
@Entity
@Table(name = "template")
public class Template implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE)
@SequenceGenerator(name="template_se", sequenceName="TEMPLATE_SE", allocationSize=1, initialValue=1)
@Basic(optional = false)
@Column(name = "ID")
private Integer id;
@Basic(optional = false)
@Column(name = "NAME", unique = true)
private String name;
@OneToMany(cascade = CascadeType.REMOVE, mappedBy = "template")
@LazyCollection(LazyCollectionOption.FALSE)
private List<Workflow> workflowList;
}
工作流实体:
@Entity
@Table(name = "workflow")
public class Workflow implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE)
@SequenceGenerator(name="wf_se", sequenceName="WF_SE", allocationSize=1, initialValue=1)
@Basic(optional = false)
@Column(name = "ID")
private Integer id;
@Basic(optional = false)
@Column(name = "SEQ_NO")
private int seqNo;
@JoinColumn(name = "T_ID", referencedColumnName = "ID", nullable = false)
@ManyToOne
private Template template;
@Basic(optional = false)
@Column(name = "NAME")
private String name;
}
命令实体:
@Entity
@Table(name = "command")
public class Command implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE)
@SequenceGenerator(name="command_se", sequenceName="COMMAND_SE", allocationSize=1, initialValue=1)
@Basic(optional = false)
@Column(name = "ID")
private Integer id;
@JoinColumn(name = "WORKFLOW_ID", referencedColumnName = "ID")
@ManyToOne(optional = false)
private Workflow workflow;
}