【发布时间】：2018-01-13 10:55:44
【问题描述】：
我的 jpa 映射有什么问题，我试图将具有一个主键的父类映射到具有复合键的子类，但它似乎插入了错误的表中，它已经生成了 2 个表但不幸的是我没有绑定外键(policy_value_summary_id)
@Entity
@Table(name = "POLICY_VALUE_SUMMARY")
public class PolicyValueSummary {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name="POLICY_VALUE_SUMMARY_ID")
private Long policyValueSummaryId;
@MapsId("policyValueSummaryId")
@OneToMany
private Set<PolicyValue> policyValues;
}
子类具有复合键，其中一个是父 ID。
@Entity
@Table(name = "POLICY_VALUE")
public class PolicyValue {
@EmbeddedId
@AttributeOverrides({
@AttributeOverride(name = "policyValueSummaryId", column = @Column(name = "POLICY_VALUE_SUMMARY_ID")),
@AttributeOverride(name = "planAtrId", column = @Column(name = "PLAN_ATR_ID")) })
private PolicyValuePk policyValuePk;
}
这是我的子类复合键。
@Embeddable
public class PolicyValuePk implements Serializable {
private Long policyValueSummaryId;
private Long planAtrId;
}
我正在尝试用这样的策略值（子类）保存策略摘要值（父级）
PolicyValuePk pk = new PolicyValuePk();
pk.setPlanAtrId(Long.valueOf("1"));
Set<PolicyValue> policyValues = new HashSet<>();
policyValues.add(new PolicyValue(pk));
PolicyValueSummary summary = new PolicyValueSummary();
summary.setPolicyValues(policyValues);
repo.save(summary);
这是输出给我的错误
Hibernate: select hibernate_sequence.nextval from dual
Hibernate: insert into policy_value_summary (policy_value_summary_id) values (?)
Hibernate: insert into policy_value_summary_policy_values (policy_value_summary_policy_value_summary_id, policy_values_plan_atr_id, policy_values_policy_value_summary_id) values (?, ?, ?)
WARN 6880 --- [ main] o.h.engine.jdbc.spi.SqlExceptionHelper : SQL Error: 972, SQLState: 42000
ERROR 6880 --- [ main] o.h.engine.jdbc.spi.SqlExceptionHelper : ORA-00972: identifier is too long
【问题讨论】：
标签： java hibernate jpa hibernate-mapping