[英]Delete entity with Composite Key by Primary Key
我有4張桌子。
國家 (id,名稱), CountryType (id,名稱), 客戶 (id,名稱)和Country_CountryType_Client關系表(country_id,countryType_id,client_id)。
這是我的Country class
:
@GeneratePojoBuilder(
intoPackage = "*.builder")
@Entity
@Table(name = "MD_COUNTRY")
@SequenceGenerator(
name = "SEQ_MD_COUNTRY",
sequenceName = "SEQ_MD_COUNTRY",
allocationSize = 1)
public class Country implements Serializable {
private static final long serialVersionUID = -3313476149373055743L;
private Long md_country_id;
private String nameKey;
private List<CountryCountryTypeClient> cCTypeClients;
@Id
@GeneratedValue(
generator = "SEQ_MD_COUNTRY")
@Column(
name = "MD_COUNTRY_ID")
public Long getMd_country_id() {
return md_country_id;
}
public void setMd_country_id(Long md_country_id) {
this.md_country_id = md_country_id;
}
@Column(name = "MD_COUNTRY_NAME_KEY")
public String getNameKey() {
return this.nameKey;
}
public void setNameKey(String name) {
this.nameKey = name;
}
@OneToMany(fetch=FetchType.EAGER,mappedBy="pk.country",cascade=CascadeType.ALL)
public List<CountryCountryTypeClient> getCountryCountryTypeClient() {
return cCTypeClients;
}
public void setCountryCountryTypes(List<CountryCountryTypeClient> countryCountryTypeClient) {
this.cCTypeClient = countryCountryTypeClient;
}
/* ... hashCode and equals methods..*/
CountryType
和Client classes
看起來相同。
這是我的CountryCountryTypeClient
類:
@GeneratePojoBuilder(
intoPackage = "*.builder")
@Entity
@Table(
name = "COUNTRY_COUNTRY_TYPE_CLIENT")
@AssociationOverrides({
@AssociationOverride(name= "pk.country",
joinColumns=@JoinColumn(name = "COUNTRY_ID")),
@AssociationOverride(name="pk.countryType",
joinColumns=@JoinColumn(name = "COUNTRY_TYPE_ID")),
@AssociationOverride(name="pk.client",
joinColumns=@JoinColumn(name = "CLIENT_ID"))
})
public class CountryCountryTypeClient implements Serializable{
private static final long serialVersionUID = -879391903880384781L;
private CountryCountryTypeClientPK pk = new CountryCountryTypeClientPK();
public CountryCountryTypeClient() {}
@EmbeddedId
public CountryCountryTypeClientPK getPk() {
return pk;
}
public void setPk(CountryCountryTypeClientPK pk) {
this.pk = pk;
}
@Transient
public Country getCountry(){
return getPk().getCountry();
}
public void setCountry(Country country) {
getPk().setCountry(country);
}
@Transient
public CountryType getCountryType(){
return getPk().getCountryType();
}
public void setCountryType(CountryType countryType) {
getPk().setCountryType(countryType);
}
@Transient
public Client getClient() {
return getPk().getClient();
}
public void setClient(Client client) {
getPk().setClient(client);
}
/* ... hashCode and equals ... */
這是我的CountryCountryTypeClientPK
類:
@Embeddable
public class CountryCountryTypeClientPK implements Serializable {
private static final long serialVersionUID = -3934592006396010170L;
private Country country;
private CountryType countryType;
private Client client;
public CountryCountryTypeClientPK() {}
@ManyToOne
public Country getCountry() {
return country;
}
public void setCountry(Country country) {
this.country = country;
}
@ManyToOne
public CountryType getCountryType() {
return countryType;
}
public void setCountryType(CountryType countryType) {
this.countryType = countryType;
}
@ManyToOne
public Client getClient() {
return client;
}
public void setClient(Client client) {
this.client = client;
}
/*... hashCode and equals methods ..*/
我的CountryCountryTypeClientRepository
類:
public interface CountryCountryTypeRepository extends JpaRepository<CountryCountryTypeClient, CountryCountryTypeClientPK> {}
對於我的Country類,我具有帶有saveCountry方法的CountryService類:
public Country saveCountry(final Country dtoCountry) {
//save NEW Country
if(dtoCountry.getId()==null){
de.bonprix.global.masterdata.model.Country modelWithoutID = convertToModel(dtoCountry);
for (CountryCountryTypeClient cCTypeClient : modelWithoutID.getCountryCountryTypeClients()) {
cCTypeClient.setCountry(modelWithoutID);
}
return convertToDTO(this.countryRepository.saveAndFlush(modelWithoutID));
}
//save EDITED Country
else if (!(dtoCountry.getId()==null)){
de.bonprix.global.masterdata.model.Country modelWithID = convertToModel(dtoCountry);
for (CountryCountryTypeClient cCTypeClient : modelWithID.getCountryCountryTypeClients()) {
cCTypeClient.setCountry(modelWithID);
ccTypeClientRepository.delete(cCTypeClient);
}
return convertToDTO(this.countryRepository.saveAndFlush(modelWithID));
}
return null;
}
問題是:如何通過Country_ID從Country_CountryType_Client表中刪除所有行。 不是通過PK,而是通過Country_ID。 將國家/地區保存在國家/地區表中時,Country_CountryType_Client將自動更新為相應的值。
小例子 ,只是為了清除當前問題。 現在在我的Country_CountryType_Client表中有這個。
現在我想保存有除最后一行(298-2-9)都是一樣的關系NewCountry。 我的NewCountry一無所知(298-2-9關系)。 保存之前,我必須刪除所有具有298 id的行。
希望問題解決。
我不太了解這個問題。 似乎您真正想要做的就是從標識為298的國家/地區刪除單個CountryCountryTypeClient。
因此,如果要按照以下概述更新映射:
https://docs.oracle.com/cd/E19798-01/821-1841/giqxy/
@OneToMany(fetch=FetchType.EAGER,mappedBy="pk.country",cascade=CascadeType.ALL, orphanRemoval = true)
public List<CountryCountryTypeClient> getCountryCountryTypeClient() {
return cCTypeClients;
}
然后,您可以簡單地執行以下操作:
Country country = // the country with id 298
CountryCountryTypeClient client = // the client with id 298/2/9
country.getCountryCountryTypeClient().remove(client);
countryRepository.save(country);
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