Question

我为我的问题浏览了很多堆栈，但我得到的答案很少，但我的应用程序没有工作。我试图根据父类中由@OnetoMany注释映射的字段来查询数据。

我的父类是NodeDetails：

    @Entity
@Table(name = "tb_node_details")
public class NodeDetails implements Serializable {

    /**
     * 
     */
    private static final long serialVersionUID = 3232846606798223969L;

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    @Column(name = "instance_id", nullable = false)
    private String instanceId;

    @Column(name = "host_id")
    private String hostId;

    @Column(name = "host_type")
    private String hostType;

    @Column(name = "client_name")
    private String clientName;

我有一个NodeAdapterKindDetails的子类：

@Entity
@Table(name = "tb_node_adapter_kind_details")
public class NodeAdapterKindDetails implements Serializable {

    /**
     * 
     */
    private static final long serialVersionUID = 6542657705062870675L;

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    @Column(name = "adapter_kind", nullable = false)
    private String adapterKind;

    @ManyToOne(fetch = FetchType.EAGER, cascade = CascadeType.ALL)
    @JoinColumn(name = "node_id", nullable = false)
    private NodeDetails nodeDetails;

    @OneToMany(fetch = FetchType.LAZY, cascade = CascadeType.ALL, mappedBy = "adapterKindDetails")
    private Set<NodeAdapterInstanceDetails> adapterInstanceDetails = new HashSet<>();

它的子类是NodeAdapterInstanceDetails：

@Entity
@Table(name = "tb_node_adapter_instance_details")
public class NodeAdapterInstanceDetails {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    @Column(name = "adapter_instance")
    private String adapterInstance;

    @Column(name = "active_status", columnDefinition = "varchar(20) default 'not active'")
    private String activeStatus;

    // TODO: change the timestamp from string to date... Check what is going
    // wrong in the commented setTimeStamp method
    @Column(name = "time_stamp")
    private String timeStamp;

    @ManyToOne(fetch = FetchType.EAGER, cascade = CascadeType.ALL)
    @JoinColumn(name = "adapter_kind_id", nullable = false)
    private NodeAdapterKindDetails adapterKindDetails;

nodeAdapterInstance类的DAO：

    @Repository(value="nodeAdapterInstanceDao")
    public interface NodeAdapterInstanceDao extends JpaRepository<NodeAdapterInstanceDetails, Long> {

        @Query("select distinct n.adapterInstance from NodeAdapterInstanceDetails n where n.adapterKindDetails.nodeDetails.clientName = :client_name")
        public List<String> getDistinctAdapterInstanceByClientName(@Param("client_name") String clientName);

        @Query("select n from NodeAdapterInstanceDetails n where n.adapterInstance = :adapter_instance and n.adapterKindDetails.nodeDetails.clientName = :client_name")
        public NodeAdapterInstanceDetails getLatestAdapterInstanceByAdapterInstanceAndClientName(@Param("adapter_instance") String adapterInstance, @Param("client_name") String clientName);

}

但是当我尝试运行spring boot时，在应用程序启动时我得到：

**

org.springframework.beans.factory.UnsatisfiedDependencyException：创建名称为＆＃39; adapterKindParserServiceImpl＆＃39;的bean时出错：通过现场表达的不满意的依赖性＆＃39; nodeAdapterInstanceDao＆＃39 ;;嵌套异常是 org.springframework.beans.factory.BeanCreationException：错误创建名称为“nodeAdapterInstanceDao＆＃39;：init的调用”的bean 方法失败;嵌套异常是 org.springframework.data.mapping.PropertyReferenceException：没有找到类型为NodeAdapterInstanceDetails的属性clientName！

**

我是否对查询做了任何错误，我该如何解决此错误。我们可以像这样使用JPA存储库@query：

@Query("select n from NodeAdapterInstanceDetails n where n.adapterInstance = :adapter_instance and n.adapterKindDetails.nodeDetails.clientName = :client_name")

由于我在节点适配器实例类中没有客户端信息，因此我需要从我的层次结构中最常见的节点详细信息类中获取它。

这是我的服务：

@Service
public class AdapterKindParserServiceImpl implements NodeAdapterKindDetailsParserService {
    @Autowired
    @Qualifier(value="nodeAdapterInstanceDao")
    private NodeAdapterInstanceDao nodeAdapterInstanceDao;
    private List<String> getDistinctAdapterInstances(String clientName) {
        return nodeAdapterInstanceDao.findDistinctAdapterInstanceByClientName(clientName);
    }
}

我的完全例外：

org.springframework.beans.factory.UnsatisfiedDependencyException：创建名称为＆＃39; adapterKindParserServiceImpl＆＃39;的bean时出错：通过现场表达的不满意的依赖性＆＃39; nodeAdapterInstanceDao＆＃39 ;;嵌套异常是 org.springframework.beans.factory.BeanCreationException：错误创建名称为“nodeAdapterInstanceDao＆＃39;：init的调用”的bean 方法失败;嵌套异常是 org.springframework.data.mapping.PropertyReferenceException：没有找到类型NodeAdapterInstanceDetails的属性clientName！在 org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor $ AutowiredFieldElement.inject（AutowiredAnnotationBeanPostProcessor.java:588）〜[spring-beans-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.springframework.beans.factory.annotation.InjectionMetadata.inject（InjectionMetadata.java:88）〜[spring-beans-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues（AutowiredAnnotationBeanPostProcessor.java:366）〜[spring-beans-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean（AbstractAutowireCapableBeanFactory.java:1264）〜[spring-beans-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:553）〜[spring-beans-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:483）〜[spring-beans-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory $ 1.getObject（AbstractBeanFactory.java:306）〜[spring-beans-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:230）〜[spring-beans-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:302）〜[spring-beans-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:197）〜[spring-beans-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons（DefaultListableBeanFactory.java:761）〜[spring-beans-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization（AbstractApplicationContext.java:867）〜[spring-context-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.springframework.context.support.AbstractApplicationContext.refresh（AbstractApplicationContext.java:543）〜[spring-context-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh（EmbeddedWebApplicationContext.java:122）〜[spring-boot-1.5.6.RELEASE.jar：1.5.6.RELEASE] at org.springframework.boot.SpringApplication.refresh（SpringApplication.java:693） [spring-boot-1.5.6.RELEASE.jar：1.5.6.RELEASE] at org.springframework.boot.SpringApplication.refreshContext（SpringApplication.java:360） [spring-boot-1.5.6.RELEASE.jar：1.5.6.RELEASE] at org.springframework.boot.SpringApplication.run（SpringApplication.java:303） [spring-boot-1.5.6.RELEASE.jar：1.5.6.RELEASE] at org.springframework.boot.SpringApplication.run（SpringApplication.java:1118） [spring-boot-1.5.6.RELEASE.jar：1.5.6.RELEASE] at org.springframework.boot.SpringApplication.run（SpringApplication.java:1107） [spring-boot-1.5.6.RELEASE.jar：1.5.6.RELEASE] at com.vmware.supernova.TopolizerApp.main（TopolizerApp.java:18） [classes /：na]引起： org.springframework.beans.factory.BeanCreationException：错误创建名称为“nodeAdapterInstanceDao＆＃39;：init的调用”的bean 方法失败;嵌套异常是 org.springframework.data.mapping.PropertyReferenceException：没有找到类型NodeAdapterInstanceDetails的属性clientName！在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean（AbstractAutowireCapableBeanFactory.java:1628）〜[spring-beans-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:555）〜[spring-beans-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:483）〜[spring-beans-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory $ 1.getObject（AbstractBeanFactory.java:306）〜[spring-beans-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:230）〜[spring-beans-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:302）〜[spring-beans-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:202）〜[spring-beans-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate（DependencyDescriptor.java:208）〜[spring-beans-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency（DefaultListableBeanFactory.java:1138）〜[spring-beans-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency（DefaultListableBeanFactory.java:1066）〜[spring-beans-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor $ AutowiredFieldElement.inject（AutowiredAnnotationBeanPostProcessor.java:585）〜[spring-beans-4.3.10.RELEASE.jar：4.3.10.RELEASE] ... 19常见帧省略引起的： org.springframework.data.mapping.PropertyReferenceException：没有找到类型NodeAdapterInstanceDetails的属性clientName！在 org.springframework.data.mapping.PropertyPath。（PropertyPath.java:77）〜[spring-data-commons-1.13.6.RELEASE.jar：na] at org.springframework.data.mapping.PropertyPath.create（PropertyPath.java:329）〜[spring-data-commons-1.13.6.RELEASE.jar：na] at org.springframework.data.mapping.PropertyPath.create（PropertyPath.java:309）〜[spring-data-commons-1.13.6.RELEASE.jar：na] at org.springframework.data.mapping.PropertyPath.from（PropertyPath.java:272）〜[spring-data-commons-1.13.6.RELEASE.jar：na] at org.springframework.data.mapping.PropertyPath.from（PropertyPath.java:243）〜[spring-data-commons-1.13.6.RELEASE.jar：na] at org.springframework.data.repository.query.parser.Part。（Part.java:76）〜[spring-data-commons-1.13.6.RELEASE.jar：na] at org.springframework.data.repository.query.parser.PartTree $ OrPart。（PartTree.java:247）〜[spring-data-commons-1.13.6.RELEASE.jar：na] at org.springframework.data.repository.query.parser.PartTree $ Predicate.buildTree（PartTree.java:398）〜[spring-data-commons-1.13.6.RELEASE.jar：na] at org.springframework.data.repository.query.parser.PartTree $谓词（PartTree.java:378）〜[spring-data-commons-1.13.6.RELEASE.jar：na] at org.springframework.data.repository.query.parser.PartTree。（PartTree.java:89）〜[spring-data-commons-1.13.6.RELEASE.jar：na] at org.springframework.data.jpa.repository.query.PartTreeJpaQuery。（PartTreeJpaQuery.java:64）〜[spring-data-jpa-1.11.6.RELEASE.jar：na] at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy $ CreateQueryLookupStrategy.resolveQuery（JpaQueryLookupStrategy.java:103）〜[spring-data-jpa-1.11.6.RELEASE.jar：na] at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy $ CreateIfNotFoundQueryLookupStrategy.resolveQuery（JpaQueryLookupStrategy.java:214）〜[spring-data-jpa-1.11.6.RELEASE.jar：na] at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy $ AbstractQueryLookupStrategy.resolveQuery（JpaQueryLookupStrategy.java:77）〜[spring-data-jpa-1.11.6.RELEASE.jar：na] at org.springframework.data.repository.core.support.RepositoryFactorySupport $ QueryExecutorMethodInterceptor。（RepositoryFactorySupport.java:436）〜[spring-data-commons-1.13.6.RELEASE.jar：na] at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository（RepositoryFactorySupport.java:221）〜[spring-data-commons-1.13.6.RELEASE.jar：na] at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.initAndReturn（RepositoryFactoryBeanSupport.java:277）〜[spring-data-commons-1.13.6.RELEASE.jar：na] at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet（RepositoryFactoryBeanSupport.java:263）〜[spring-data-commons-1.13.6.RELEASE.jar：na] at org.springframework.data.jpa.repository.support.JpaRepositoryFactoryBean.afterPropertiesSet（JpaRepositoryFactoryBean.java:101）〜[spring-data-jpa-1.11.6.RELEASE.jar：na] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods（AbstractAutowireCapableBeanFactory.java:1687）〜[spring-beans-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean（AbstractAutowireCapableBeanFactory.java:1624）〜[spring-beans-4.3.10.RELEASE.jar：4.3.10.RELEASE] ... 29常见框架省略

请说明如何解决此异常。如果可能的话，可以说更好的方法是使用@OnetoOne，@ OnetoMany和@ManytoMany的查询。

提前致谢

Answer 1

按照以下方式更正您的查询：

select distinct 
    n.adapterInstance 
from 
    NodeAdapterInstanceDetails n 
    join n.adapterKindDetails ad
    join ad.nodeDetails nd
where 
    nd.clientName = :client_name

select 
    n 
from 
    NodeAdapterInstanceDetails n 
    join n.adapterKindDetails ad
    join ad.nodeDetails nd
where 
    n.adapterInstance = :adapter_instance and 
    nd.clientName = :client_name

要获得使用链接实体的能力，您首先必须加入＆＃39;这个实体。

更多信息：JPQL Language Reference

如何使用jpa存储库

1 个答案: