Jpa 持久化多对一类时违反外键约束
尝试持久化多对一实体时出错: 内部异常:org.postgresql.util.PSQLException:错误:表“concept”的插入或更新违反外键约束“concept\u concept\u class\u fk” 详细信息:表“概念类”中不存在键(概念类id)=(概念)。 错误代码:0 调用:插入概念(概念密钥、描述、标签、代码、概念类id)值(?,,,?,?) bind=>[27,描述1,标签1,代码1,概念] 查询:InsertObjectQuery(com.mirth.results.entities.Concept[conceptKey=27]) 在com.sun.ejb.containers.BaseContainer.checkExceptionClientTx(BaseContainer.java:3728)上 在com.sun.ejb.containers.BaseContainer.postInvokeTx上(BaseContainer.java:3576) 在com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:1354)上 ... 还有101个 下面是尝试将其持久化的方法。我在下面这行写了一条评论:Jpa 持久化多对一类时违反外键约束,jpa,ejb,eclipselink,Jpa,Ejb,Eclipselink,尝试持久化多对一实体时出错: 内部异常:org.postgresql.util.PSQLException:错误:表“concept”的插入或更新违反外键约束“concept\u concept\u class\u fk” 详细信息:表“概念类”中不存在键(概念类id)=(概念)。 错误代码:0 调用:插入概念(概念密钥、描述、标签、代码、概念类id)值(?,,,?,?) bind=>[27,描述1,标签1,代码1,概念] 查询:InsertObjectQuery(com.mirth.resul
@Override
public void loadConcept(String metaDataFilePath, String dataFilePath) throws Exception {
try {
ConceptClassMetaData conceptClassMetaData = (ConceptClassMetaData) ModelSerializer.getInstance().fromXML(FileUtils.readFileToString(new File(metaDataFilePath), "UTF8"));
em.executeNativeQuery(conceptClassMetaData.getCreateStatement());
ConceptClassRow conceptClassRow = conceptClassMetaData.getConceptClassRow();
ConceptClass conceptClass = em.findByPrimaryKey(ConceptClass.class, conceptClassRow.getId());
if (conceptClass == null) {
conceptClass = new ConceptClass(conceptClassRow.getId());
}
conceptClass.setLabel(conceptClassRow.getLabel());
conceptClass.setOid(conceptClassRow.getOid());
conceptClass.setDescription(conceptClassRow.getDescription());
conceptClass = em.merge(conceptClass);
DataParser dataParser = new DataParser(conceptClassMetaData, dataFilePath);
for (ConceptModel conceptModel : dataParser.getConceptRows()) {
ConceptFilter<Concept> filter = new ConceptFilter<Concept>(Concept.class);
filter.setCode(conceptModel.getCode());
filter.setConceptClass(conceptClass.getLabel());
List<Concept> concepts = em.findAllByFilter(filter);
Concept concept = new Concept();
if (concepts != null && !concepts.isEmpty()) {
concept = concepts.get(0);
}
concept.setCode(conceptModel.getCode());
concept.setDescription(conceptModel.getDescription());
concept.setLabel(conceptModel.getLabel());
concept.setConceptClass(conceptClass);
concept = em.merge(concept); //THIS LINE CAUSES THE ERROR!
}
} catch (Exception e) {
e.printStackTrace();
throw e;
}
}
此外,重要的是正在生成的sql:
在概念类(id、oid、描述、标签)中插入值(?,?,?)bind=>[LOINC\u测试,2.16.212.31.231.54,这是LOINC\u测试的元数据文件,LOINC\u测试]
在概念(概念密钥、描述、标签、代码、概念类id)中插入值(?、、、?、?)bind=>[27,描述1,标签1,代码1,概念
失败的原因很明显:它为概念类id插入了单词概念。它应该插入单词LOINC\u TEST。我不明白它为什么用这个词。我使用调试器查看了Concept和ConceptClass实例,它们都不包含这个词。我用的是eclipselink。有人知道为什么会这样吗 列概念\u类\u id有两个相互冲突的定义 列概念\类\ id出现在类概念周围的@DiscriminatorColumn和@JoinColumn注释中。你不能那样做。这两个注释正在争夺表概念中列概念\类\ id的控制权@“鉴别器”栏目恰好获胜。这就是为什么类名“Concept”出现在SQL绑定中,您希望在该绑定中有一个ConceptClass id 顺便说一下,@DiscriminatorColumn仅在多个类共享一个表时才有用。@D/C记录a类行代表的类别。如果概念表中仅存储类概念的对象,则可以删除@DiscriminatorColumn@除非一个表中有多个类,否则D/C是没有意义的 总而言之,修复包括:
- 在概念的@DiscriminatorColumn注释中更改“name”
- 更改Concept.conceptClass的@JoinColumn注释中的“name”
- 删除类概念上的@DiscriminatorColumn注释
@Entity
@Table(name = "concept")
@Inheritance(strategy=InheritanceType.JOINED)
@DiscriminatorColumn(name="concept_class_id", discriminatorType=DiscriminatorType.STRING)
public class Concept extends KanaEntity {
@Id
@Basic(optional = false)
@Column(name = "concept_key")
protected Integer conceptKey;
@Basic(optional = false)
@Column(name = "code")
private String code;
@Basic(optional = false)
@Column(name = "label")
private String label;
@Column(name = "description")
private String description;
@JoinColumn(name = "concept_class_id", referencedColumnName = "id")
@ManyToOne
private ConceptClass conceptClass;
...
@Entity
@Table(name = "concept_class")
public class ConceptClass extends KanaEntity {
@Id
@Basic(optional = false)
@Column(name = "id")
private String id;
@Basic(optional = false)
@Column(name = "label")
private String label;
@Column(name = "oid")
private String oid;
@Column(name = "description")
private String description;
....