Question

我有两个类：Person和Computer我想获取属于某个人的计算机列表

@Entity
public class Person implements Serializable {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id_pperson;
    private String name;
    private String last_name;
    @OneToMany(mappedBy = "Person", fetch = FetchType.LAZY)
    private Collection<Computer> pc;
    public void setPc(Collection<Computer> pc) {
        this.pc = pc;
    }
    public Collection<Computer> getPc() {
        return pc;
    }
}
@Entity
public class Computer implements Serializable {
    @Id @GeneratedValue(strategy = GenerationType.IDENTITY)
    private long id;
        private String brand;
    @ManyToOne
    @JoinColumn(name="id_owner", referencedColumnName = "id_person", insertable = true)
    private Person Person;
    public long getid_owner()
    {
        return Person.getId_person();
    }
}

所以我在ComputerRepository中添加了一个方法，用外键id_owner

获取计算机

public interface ComputerRepository extends JpaRepository<FinancementExt, Long>{

@Query("select c from Computer c where c.id_owner = :id")
public Page <FinancementExt> findAllByIdOwner(@Param("id")long id_owner,Pageable pageable);}

这是服务

public interface ComputerService { public Page<Computer> listFEByComputer(long id_owner,int page, int size);       }

    @Service public class ComputerServiceImp implements ComputerService {
       @Autowired
       ComputerRepository CRepository;
       @Override
        public Page<Computer> listFEByComputer(long id_owner, int page, int size) {
         return CRepository.findAllByIdOwner(id_owner, new PageRequest(page, size));
      }

}

这是其余的控制器：

@RestController  public class ComputerRestService {
@Autowired
private ComputerService computerService ;
@RequestMapping(value="/listcomputersByperson",method=RequestMethod.GET)
public Page<Computer> listFEByComputer(long id_owner,int page, int size) {
    return ComputerService.listFEByComputer(id_owner,page, size);
}

}

这些是我得到的赘述：

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'ComputerServiceImp ': Unsatisfied dependency expressed through field 'CompuerRepository'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'CompuerRepository': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Validation failed for query for method public abstract org.springframework.data.domain.Page com.projet.dao.CompuerRepository.findAllByIdOwner(long,org.springframework.data.domain.Pageable)!
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:588) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:366) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1264) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:866) ~[spring-context-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:542) ~[spring-context-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:737) [spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:370) [spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:314) [spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1162) [spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1151) [spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE]
at com.projet.SuiviProjetApplication.main(SuiviProjetApplication.java:17) [classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_111]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_111]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_111]
at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_111]
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-1.5.1.RELEASE.jar:1.5.1.RELEASE]

引起：org.springframework.beans.factory.BeanCreationException：创建名为'CompuerRepository'的bean时出错：init方法的调用失败;嵌套异常是java.lang.IllegalArgumentException：查询方法public abstract org.springframework.data.domain.Page com.projet.dao.CompuerRepository.findAllByIdOwner（long，org.springframework.data.domain.Pageable）的验证失败！在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean（AbstractAutowireCapableBeanFactory.java:1628）〜[spring-beans-4.3.6.RELEASE.jar：4.3.6.RELEASE] 在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:230)~ [spring-beans-4.3.6.RELEASE.jar：4.3.6 。发布] at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency（DefaultListableBeanFactory.java:1138)~ [spring-beans-4.3.6.RELEASE.jar：4.3.6.RELEASE] org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor $ AutowiredFieldElement.inject（AutowiredAnnotationBeanPostProcessor.java：585）〜[spring-beans-4.3.6.RELEASE.jar：4.3.6.RELEASE] ...省略了24个常用帧引起：org.hibernate.QueryException：无法解析属性：id_prj：com.projet.entities.FinancementExt 在org.hibernate.persister.entity.AbstractPropertyMapping.propertyException（AbstractPropertyMapping.java:62）〜[hibernate-core-5.0.11.Final.jar：5.0.11.Final] 在org.hibernate.persister.entity.AbstractPropertyMapping.toType（AbstractPropertyMapping.java:56）〜[hibernate-core-5.0.11.Final.jar：5.0.11.Final] 在org.hibernate.persister.entity.AbstractEntityPersister.toType（AbstractEntityPersister.java:1764）〜[hibernate-core-5.0.11.Final.jar：5.0.11.Final] 在org.hibernate.hql.internal.ast.tree.FromElementType.getPropertyType（FromElementType.java:393）〜[hibernate-core-5.0.11.Final.jar：5.0.11.Final] 在org.hibernate.hql.internal.ast.tree.FromElement.getPropertyType（FromElement.java:505）〜[hibernate-core-5.0.11.Final.jar：5.0.11.Final] 在org.hibernate.hql.internal.ast.tree.DotNode.getDataType（DotNode.java:660）〜[hibernate-core-5.0.11.Final.jar：5.0.11.Final] 在org.hibernate.hql.internal.ast.tree.DotNode.prepareLhs（DotNode.java:264）〜[hibernate-core-5.0.11.Final.jar：5.0.11.Final] 在org.hibernate.hql.internal.ast.tree.DotNode.resolve（DotNode.java:204）〜[hibernate-core-5.0.11.Final.jar：5.0.11.Final] 在org.hibernate.hql.internal.ast.tree.FromReferenceNode.resolve（FromReferenceNode.java:109）〜[hibernate-core-5.0.11.Final.jar：5.0.11.Final] 在org.hibernate.hql.internal.ast.tree.FromReferenceNode.resolve（FromReferenceNode.java:104）〜[hibernate-core-5.0.11.Final.jar：5.0.11.Final] 在org.hibernate.hql.internal.ast.HqlSqlWalker.resolve（HqlSqlWalker.java:942）〜[hibernate-core-5.0.11.Final.jar：5.0.11.Final] 在org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.expr(HqlSqlBaseWalker.java:1283)~ [hibernate-core-5.0.11.Final.jar：5.0.11.Final] 在org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.exprOrSubquery（HqlSqlBaseWalker.java:4696）〜[hibernate-core-5.0.11.Final.jar：5.0.11.Final] 在org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.comparisonExpr（HqlSqlBaseWalker.java:4166）〜[hibernate-core-5.0.11.Final.jar：5.0.11.Final] 在org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.logicalExpr（HqlSqlBaseWalker.java:2131)~ [hibernate-core-5.0.11.Final.jar：5.0.11.Final] 在org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.whereClause（HqlSqlBaseWalker.java:810）〜[hibernate-core-5.0.11.Final.jar：5.0.11.Final] 在org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.query（HqlSqlBaseWalker.java:605）〜[hibernate-core-5.0.11.Final.jar：5.0.11.Final] 在org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.selectStatement（HqlSqlBaseWalker.java:309）〜[hibernate-core-5.0.11.Final.jar：5.0.11.Final] 在org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.statement（HqlSqlBaseWalker.java:257）〜[hibernate-core-5.0.11.Final.jar：5.0.11.Final] 在org.hibernate.hql.internal.ast.QueryTranslatorImpl.analyze（QueryTranslatorImpl.java:262）〜[hibernate-core-5.0.11.Final.jar：5.0.11.Final] 在org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile（QueryTranslatorImpl.java:190）〜[hibernate-core-5.0.11.Final.jar：5.0.11.Final] ...省略了62个常见帧

Answer 1

@Query("select c from Computer c where c.id_owner = :id")
public Page <FinancementExt> findAllByIdOwner(@Param("id")long id_owner,Pageable pageable);

首先，查询选择计算机，但该方法返回Page<FinancementExt>。这毫无意义。

其次，Computer类中没有名为id_owner的持久字段。查询应该是

select c from Computer c where c.person.id = :id

并且字段Person应命名为person。尊重基本的Java命名约定。

我无法使用hql

1 个答案: