为什么我的代码会抛出 "bean not managed exception"？

Question

在我开始在我的数据源配置中添加更多存储库和实体包之前，我的代码仅使用一个存储库包就可以正常工作 class。代码失败，异常：... Error creating bean with name 'waecChemistryObjRepo' defined in com.example.resource.akademiks.waec.obj.dao.WaecChemistryObjRepo defined in @EnableJpaRepositories declared on AkademiksDbConfig: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not a managed type: class com.example.resource.akademiks.waec.obj.entity.WaecChemistryObj

主数据源配置class:

@EnableTransactionManagement
@EnableJpaRepositories(basePackages = {"com.example.resource.akademiks.waec.obj.dao",
        "com.example.resource.akademiks.waec.theory.dao", "com.example.resource.akademiks.waec.theory.answer.dao"},
 entityManagerFactoryRef = "akademiksEntityManagerFactory",
 transactionManagerRef = "akademiksTransactionManager")
public class AkademiksDbConfig {
    
    @Bean
    @Primary
    @ConfigurationProperties("spring.datasource.waecakademiks")
    public DataSourceProperties akademiksDataSourceProperties() {
        
        return new DataSourceProperties();
    }
    
    @Primary
    @Bean
    @ConfigurationProperties("spring.datasource.waecakademiks")
    public DataSource akademiksDataSource() {
        
        return akademiksDataSourceProperties().initializeDataSourceBuilder()
                .type(HikariDataSource.class).build();
        
    }
    
    
    @Primary
    @Bean(name = "akademiksEntityManagerFactory")
    public LocalContainerEntityManagerFactoryBean 
    akademiksEntityManagerFactory(EntityManagerFactoryBuilder builder) {
        
        return builder
                .dataSource(akademiksDataSource())
                .packages("com.example.resource.akademiks.waec.obj.entity")
                .packages("com.example.resource.akademiks.waec.theory.questions.entity")
                .packages("com.example.resource.akademiks.waec.theory.answer.entity")
                .build();
                
    }
    
    @Primary
    @Bean
    public PlatformTransactionManager akademiksTransactionManager(
            @Qualifier("akademiksEntityManagerFactory")
            LocalContainerEntityManagerFactoryBean akademiksEntityManagerFactory
            ) {
        return new JpaTransactionManager(akademiksEntityManagerFactory.getObject());
    }
    
}

存储库：

package com.example.resource.akademiks.waec.obj.dao;

@Repository
@RepositoryRestResource(collectionResourceRel = "chemistry", path = "chemistry")
public interface WaecChemistryObjRepo extends JpaRepository<WaecChemistryObj, Integer> {

服务层数：

 package com.example.resource.akademiks.waec.theory.chemistry.service;

public interface WaecChemistryTheoryService {}

服务实施：

 @Service
   public class WaecChemistryObjServiceImpl implements WaecChemistryObjService {
  @Autowired
 private WaecChemistryObjOptionRepo chemistryOptionRepo;

实体class:

package com.example.resource.akademiks.waec.obj.entity;

@Entity
@Table(name = "WaecChemistryObjAnswer")
public class WaecChemistryObjAnswer {

已排除其他实体和存储库。

Answer 1

packages 方法采用可变参数：

EntityManagerFactoryBuilder.Builder packages(String... packagesToScan)

您调用它 3 次而不是在一次调用中传递 3 个包。

更一般地说：利用自动配置并遵循约定优于配置方法，如评论中所建议。

为什么我的代码会抛出 "bean not managed exception"？

why does my code throw a "bean not managed exception"?

java

jpa

spring-data

spring-data-jpa

spring-boot