Question

我想从多个表中使用spring JPA检索报告。所以我将java.lang.Object作为实体传递给JpaRepository。我尝试过像

这样的东西

案例1：

@NoRepositoryBean
public interface ObjectRepository extends JpaRepository<Object, Long> {

    @Query(value = "SELECT new InOutReport(it.customer_name 'partyName', if(it.in_out_action =0,'SALE','PURCHASE') 'transactionType', it.invoice_no 'invoiceNo', im.product_name 'productName' ,it.qty 'qty',it.handed_over_to_or_by 'handedOverToOrBy', it.date 'date')"
            + " FROM inventory_transaction it, inventory_master im WHERE it.inventory_id = im.inventory_id")
    List<InOutReport> getInOutReport();
}

我会收到像

这样的错误

APPLICATION FAILED TO START
***************************

Description:

Field objectRepository in com.test.service.ReportServiceImpl required a bean of type 'com.test.repository.ObjectRepository' that could not be found.


Action:

Consider defining a bean of type 'com.test.repository.ObjectRepository' in your configuration.

案例2： 如果我定义@Repository注释

@Repository
public interface ObjectRepository{
    ...
}

我会收到像

这样的错误

Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'reportServiceImpl': Unsatisfied dependency expressed through field 'objectRepository'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'objectRepository': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not a managed type: class java.lang.Object
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:588)
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:366)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1264)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:208)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1138)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:585)
    ... 24 common frames omitted
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'objectRepository': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not a managed type: class java.lang.Object
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1628)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:208)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1138)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:585)
    ... 37 common frames omitted
Caused by: java.lang.IllegalArgumentException: Not a managed type: class java.lang.Object
    at org.hibernate.jpa.internal.metamodel.MetamodelImpl.managedType(MetamodelImpl.java:210)
    at org.springframework.data.jpa.repository.support.JpaMetamodelEntityInformation.<init>(JpaMetamodelEntityInformation.java:70)
    at org.springframework.data.jpa.repository.support.JpaEntityInformationSupport.getEntityInformation(JpaEntityInformationSupport.java:68)
    at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getEntityInformation(JpaRepositoryFactory.java:153)
    at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:100)
    at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:82)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:199)
    at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.initAndReturn(RepositoryFactoryBeanSupport.java:277)
    at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:263)
    at org.springframework.data.jpa.repository.support.JpaRepositoryFactoryBean.afterPropertiesSet(JpaRepositoryFactoryBean.java:101)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1687)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1624)
    ... 47 common frames omitted

请建议我在哪里做错了。

Answer 1

此错误表示Object不被视为实体：

引起：java.lang.IllegalArgumentException：不是托管类型： class java.lang.Object

情况就是这样：Object不是实体如果要使用相同的Spring存储库处理所有实体，则应引入基类并使所有报告类扩展此基类。

然后使用此基类来参数化您的存储库：

public interface MyEntityRepository extends JpaRepository<MyEntity, Long> {

当然，如果所有报告类都有一个共同的结构，那就没有意义。否则，你将不得不做一些向下转换，你将完成一个脆弱且不易读的代码。

Answer 2

您可以从这些多表创建数据库视图，然后为其创建实体。如果您仅将其用于报告目的，这应该可以解决您的问题。但你不能在同一个地方更新任何东西。

@Entity
@Table(name="VW_reports")
@NamedQuery(name="ViewReports.findAll", query="SELECT v FROM ViewReports v")
public class ViewReports {
}

如何在spring jpa中编写GenericRepository

2 个答案: