Hibernate 如何查询复合主键的子集？
我有以下课程：Hibernate 如何查询复合主键的子集？,hibernate,spring-data-jpa,Hibernate,Spring Data Jpa,我有以下课程： @Entity @Table(name = "my_entity") @JsonIgnoreProperties(ignoreUnknown = true) public class MyEntity { @EmbeddedId private Pk id; public Pk getId() { return id; } public void setId(Pk id) { this.id = id;
@Entity
@Table(name = "my_entity")
@JsonIgnoreProperties(ignoreUnknown = true)
public class MyEntity {
@EmbeddedId
private Pk id;
public Pk getId() {
return id;
}
public void setId(Pk id) {
this.id = id;
}
}
@Embeddable
public class Pk implements Serializable {
private static final long serialVersionUID = -3090221844117493661L;
private Integer type;
private String userId;
public Pk() {
}
public Pk(String userId, Integer type) {
this.setUserId(userId);
this.setType(type);
}
public Integer getType() {
return type;
}
public String getUserId() {
return userId;
}
public void setType(Integer type) {
this.type = type;
}
public void setUserId(String userId) {
this.userId = userId;
}
// Auto-generated by Eclipse.
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((type == null) ? 0 : type.hashCode());
result = prime * result + ((userId == null) ? 0 : userId.hashCode());
return result;
}
// Auto-generated by Eclipse.
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Pk other = (Pk) obj;
if (type != other.type)
return false;
if (userId == null) {
if (other.userId != null)
return false;
} else if (!userId.equals(other.userId))
return false;
return true;
}
}
public interface MyEntityRepository extends JpaRepository<MyEntity, Pk> {
List<MyEntity> findAllByUserId(String userId);
}
@实体
@表（name=“我的实体”）
@JsonIgnoreProperties（ignoreUnknown=true）
公共类MyEntity{
@嵌入ID
私有pkid；
公共Pk getId（）{
返回id；
}
公共无效设置id（主键id）{
this.id=id；
}
}
@可嵌入
公共类Pk实现可序列化{
私有静态最终长serialVersionUID=-309021844117493661L；
私有整数类型；
私有字符串用户标识；
公共Pk（）{
}
公共主键（字符串用户ID，整数类型）{
this.setUserId（userId）；
这个.setType（type）；
}
公共整数getType（）{
返回类型；
}
公共字符串getUserId（）{
返回用户标识；
}
公共void集合类型（整数类型）{
this.type=type；
}
public void setUserId（字符串userId）{
this.userId=userId；
}
//由Eclipse自动生成。
@凌驾
公共int hashCode（）{
最终整数素数=31；
int结果=1；
result=prime*result+（（type==null）？0:type.hashCode（）；
result=prime*result+（（userId==null）？0:userId.hashCode（）；
返回结果；
}
//由Eclipse自动生成。
@凌驾
公共布尔等于（对象obj）{
if（this==obj）
返回true；
if（obj==null）
返回false；
如果（getClass（）！=obj.getClass（））
返回false；
Pk其他=（Pk）obj；
if（type！=其他.type）
返回false；
if（userId==null）{
if（other.userId！=null）
返回false；
}如果（！userId.equals（other.userId））
返回false；
返回true；
}
}
公共接口MyEntityRepository扩展了JpaRepository{
列出findAllByUserId（字符串用户ID）；
}
Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'myEntityRepository': Invocation of init method failed; nested exception is org.springframework.data.mapping.PropertyReferenceException: No property user found for type MyEntity!
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1512)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:521)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:458)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:296)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:293)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:615)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:932)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:479)
at org.springframework.context.annotation.AnnotationConfigApplicationContext.<init>(AnnotationConfigApplicationContext.java:73)
at com.myproject.backend.common.ServiceContext.start(ServiceContext.java:293)
at com.myproject.run(AbstractServiceContainer.java:55)
at com.myproject..run(AbstractServiceContainer.java:1)
at io.dropwizard.cli.EnvironmentCommand.run(EnvironmentCommand.java:42)
at io.dropwizard.cli.ConfiguredCommand.run(ConfiguredCommand.java:76)
at io.dropwizard.cli.Cli.run(Cli.java:70)
at io.dropwizard.Application.run(Application.java:72)
at com.myproject..main(CombinedServiceContainer.java:106)
Caused by: org.springframework.data.mapping.PropertyReferenceException: No property user found for type MyEntity!
at org.springframework.data.mapping.PropertyPath.<init>(PropertyPath.java:75)
at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:327)
at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:359)
at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:307)
at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:270)
at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:241)
at org.springframework.data.repository.query.parser.Part.<init>(Part.java:76)
at org.springframework.data.repository.query.parser.PartTree$OrPart.<init>(PartTree.java:213)
at org.springframework.data.repository.query.parser.PartTree$Predicate.buildTree(PartTree.java:321)
at org.springframework.data.repository.query.parser.PartTree$Predicate.<init>(PartTree.java:301)
at org.springframework.data.repository.query.parser.PartTree.<init>(PartTree.java:85)
at org.springframework.data.jpa.repository.query.PartTreeJpaQuery.<init>(PartTreeJpaQuery.java:60)
at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$CreateQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:91)
at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$CreateIfNotFoundQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:168)
at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$AbstractQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:69)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.<init>(RepositoryFactorySupport.java:320)
at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:169)
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.initAndReturn(RepositoryFactoryBeanSupport.java:224)
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:210)
at org.springframework.data.jpa.repository.support.JpaRepositoryFactoryBean.afterPropertiesSet(JpaRepositoryFactoryBean.java:92)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1571)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1509)
... 18 more
@Entity
@Table(name = "my_entity")
@JsonIgnoreProperties(ignoreUnknown = true)
@IdClass(Pk.class)
public class MyEntity {
@Id private Integer type;
@Id private String userId;
public Pk getId() {
return id;
}
public void setId(Pk id) {
this.id = id;
}
}
@IdClass(Pk.class)
public class Pk implements Serializable {
private static final long serialVersionUID = -3090221844117493661L;
private Integer type;
private String userId;
public Pk() {
}
public Pk(String userId, Integer type) {
this.setUserId(userId);
this.setType(type);
}
public Integer getType() {
return type;
}
public String getUserId() {
return userId;
}
public void setType(Integer type) {
this.type = type;
}
public void setUserId(String userId) {
this.userId = userId;
}
// Auto-generated by Eclipse.
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((type == null) ? 0 : type.hashCode());
result = prime * result + ((userId == null) ? 0 : userId.hashCode());
return result;
}
// Auto-generated by Eclipse.
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Pk other = (Pk) obj;
if (type != other.type)
return false;
if (userId == null) {
if (other.userId != null)
return false;
} else if (!userId.equals(other.userId))
return false;
return true;
}
}
public interface MyEntityRepository extends JpaRepository<MyEntity, Pk>, MyEntityRepositoryCustom {
}
public interface MyEntityRepositoryCustom {
List<MyEntity> findAllByUserId(String userId);
}
public class MyEntityRepositoryImpl implements MyEntityRepositoryCustom {
@PersistenceContext
private EntityManager em;
@Override
public List<MyEntityRepositoryCustom> findAllByUserId(String userId) {
return em
.createQuery("select o from MyEntity o where o.userId=:userId",
MyEntity.class).setParameter("userId", userId).getResultList();
}
}