org.springframework.data.mapping.PropertyReferenceException: Keine Eigenschaft detachItem für Typ Fruit gefunden

Question

Ich versuche eine benutzerdefinierte Implementierung() für ein JPA-Repository (FruitRepository) hinzuzufügen. Hier ist mein Code -

import org.springframework.beans.factory.annotation.Autowired; 
import org.springframework.boot.SpringApplication; 
import org.springframework.boot.autoconfigure.SpringBootApplication; 
import org.springframework.data.jpa.repository.JpaRepository; 
import org.springframework.stereotype.Repository; 
import org.springframework.web.bind.annotation.*; 

import javax.persistence.*; 

interface FruitRepository extends JpaRepository<Fruit, Long>, FruitRepositoryCustom { 

} 

interface FruitRepositoryCustom { 
    void detachItem(Fruit fruit); 
} 

@Repository 
class FruitRepositoryCustomImpl implements FruitRepositoryCustom { 
    @PersistenceContext 
    private EntityManager entityManager; 

    @Override 
    public void detachItem(Fruit fruit) { 
     entityManager.detach(fruit); 
    } 

} 

@SpringBootApplication 
public class EatFruitApplication { 

    public static void main(String[] args) { 
     SpringApplication.run(EatFruitApplication.class, args); 
    } 
} 

und Entity

@Entity 
class Fruit { 
    @Id 
    @GeneratedValue 
    private Long id; 
    private String name; 

    public String getName() { 
     return name; 
    } 

    public void setName(String name) { 
     this.name = name; 
    } 

    public Long getId() { 
     return id; 
    } 

    public void setId(Long id) { 
     this.id = id; 
    } 
} 

sowie

@RestController 
@RequestMapping("/fruits") 
class FruitRestController { 
    @Autowired 
    private FruitRepository fruitRepository; 

    @RequestMapping(value = "/{fruitId}", method = RequestMethod.GET) 
    public Fruit readItem(@PathVariable Long fruitId) { 
     Fruit fruit = this.fruitRepository.findOne(fruitId); 
     return fruit; 
    } 

    @RequestMapping(method = RequestMethod.POST) 
    public Fruit addItem(@RequestBody Fruit fruit) { 
     fruitRepository.save(fruit); 
     return fruit; 
    } 
} 

Aber ich bin immer Fehler folgende, während die Anwendung ausgeführt wird.

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'fruitRestController': Injection of autowired dependencies failed; 
nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private eat.fruit.FruitRepository eat.fruit.FruitRestController.fruitRepository; 
nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'fruitRepository': Invocation of init method failed; 
nested exception is org.springframework.data.mapping.PropertyReferenceException: No property detachItem found for type Fruit! at 
org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE] at 
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1214) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]  at 
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:543) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE] at 
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE] at 
org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]  at 
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE] at 
org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE] at 
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]  at 
org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE] at 
org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:839) ~[spring-context-4.2.6.RELEASE.jar:4.2.6.RELEASE] at 
org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538) ~[spring-context-4.2.6.RELEASE.jar:4.2.6.RELEASE] at 
org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118) ~[spring-boot-1.3.5.RELEASE.jar:1.3.5.RELEASE] at 
org.springframework.boot.SpringApplication.refresh(SpringApplication.java:766) [spring-boot-1.3.5.RELEASE.jar:1.3.5.RELEASE] at 
org.springframework.boot.SpringApplication.createAndRefreshContext(SpringApplication.java:361) [spring-boot-1.3.5.RELEASE.jar:1.3.5.RELEASE] at 
org.springframework.boot.SpringApplication.run(SpringApplication.java:307) [spring-boot-1.3.5.RELEASE.jar:1.3.5.RELEASE] at 
org.springframework.boot.SpringApplication.run(SpringApplication.java:1191) [spring-boot-1.3.5.RELEASE.jar:1.3.5.RELEASE] at 
org.springframework.boot.SpringApplication.run(SpringApplication.java:1180) [spring-boot-1.3.5.RELEASE.jar:1.3.5.RELEASE] at 
eat.fruit.EatFruitApplication.main(EatFruitApplication.java:36) [classes/:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_92] at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_92] at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_92] at 
java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_92]  at 
com.intellij.rt.execution.application.AppMain.main(AppMain.java:144) [idea_rt.jar:na] Caused by: 
org.springframework.beans.factory.BeanCreationException: Could not autowire field: private eat.fruit.FruitRepository 
eat.fruit.FruitRestController.fruitRepository; nested exception is 
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'fruitRepository': Invocation of init method failed; nested exception is org.springframework.data.mapping.PropertyReferenceException: No property detachItem found for type Fruit! at 
org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:573) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE] at 
org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE] at 
org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:331) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE] ... 22 common frames omitted 
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'fruitRepository': Invocation of init method failed; nested exception is 
org.springframework.data.mapping.PropertyReferenceException: No property detachItem found for type Fruit! at 
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1578) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE] at 
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE] at 
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE] at 
org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]  at 
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE] at 
org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE] at 
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]  at 
org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1192) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE] at 
org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1116) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE] at 
org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1014) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE] at 
org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:545) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE] ... 24 common frames omitted 
Caused by: org.springframework.data.mapping.PropertyReferenceException: No property detachItem found for type Fruit! at 
org.springframework.data.mapping.PropertyPath.<init>(PropertyPath.java:77) ~[spring-data-commons-1.11.4.RELEASE.jar:na]  at 
org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:329) ~[spring-data-commons-1.11.4.RELEASE.jar:na] at 
org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:309) ~[spring-data-commons-1.11.4.RELEASE.jar:na] at 
org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:272) ~[spring-data-commons-1.11.4.RELEASE.jar:na] at 
org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:243) ~[spring-data-commons-1.11.4.RELEASE.jar:na] at 
org.springframework.data.repository.query.parser.Part.<init>(Part.java:76) ~[spring-data-commons-1.11.4.RELEASE.jar:na]  at 
org.springframework.data.repository.query.parser.PartTree$OrPart.<init>(PartTree.java:235) ~[spring-data-commons-1.11.4.RELEASE.jar:na]  at 
org.springframework.data.repository.query.parser.PartTree$Predicate.buildTree(PartTree.java:373) ~[spring-data-commons-1.11.4.RELEASE.jar:na] at 
org.springframework.data.repository.query.parser.PartTree$Predicate.<init>(PartTree.java:353) ~[spring-data-commons-1.11.4.RELEASE.jar:na] at 
org.springframework.data.repository.query.parser.PartTree.<init>(PartTree.java:84) ~[spring-data-commons-1.11.4.RELEASE.jar:na]  at 
org.springframework.data.jpa.repository.query.PartTreeJpaQuery.<init>(PartTreeJpaQuery.java:62) ~[spring-data-jpa-1.9.4.RELEASE.jar:na]  at 
org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$CreateQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:100) ~[spring-data-jpa-1.9.4.RELEASE.jar:na] at 
org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$CreateIfNotFoundQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:211) ~[spring-data-jpa-1.9.4.RELEASE.jar:na] at 
org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$AbstractQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:74) ~[spring-data-jpa-1.9.4.RELEASE.jar:na] at 
org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.<init>(RepositoryFactorySupport.java:416) ~[spring-data-commons-1.11.4.RELEASE.jar:na]  at 
org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:206) ~[spring-data-commons-1.11.4.RELEASE.jar:na]  at 
org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.initAndReturn(RepositoryFactoryBeanSupport.java:251) ~[spring-data-commons-1.11.4.RELEASE.jar:na]  at 
org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:237) ~[spring-data-commons-1.11.4.RELEASE.jar:na] at 
org.springframework.data.jpa.repository.support.JpaRepositoryFactoryBean.afterPropertiesSet(JpaRepositoryFactoryBean.java:92) ~[spring-data-jpa-1.9.4.RELEASE.jar:na] at 
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1637) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE] at 
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE] ... 34 common frames omitted 

Bitte helfen Sie.

Danke.

Answer 1

Die Bearbeitung der Annotation @PersistenceContext durch Spring macht fast genau das, was Sie wollen, mit einem großen Unterschied: Sie erhalten immer einen transaktionsbasierten EntityManager und Spring injiziert immer die gleiche Instanz für denselben Thread, sodass Sie eine Art Propagierung haben und müssen sich nicht um die Fadensicherheit kümmern. Aber Sie werden nie einen erweiterten Kontext auf diese Weise bekommen! Glaub mir, Frühling 3 und erweiterter Persistenzkontext spielen nicht gut zusammen, vielleicht wird sich das im Frühjahr 3.1 ändern, aber ich fürchte, das ist nicht in ihrem Fokus. Wenn Sie einen erweiterten Persistenzkontext verwenden möchten, lassen Sie Spring die EntityManagerFactory injizieren (über die Annotation @PersistenceUnit) und erstellen Sie dann den EntityManager selbst. Für die Weitergabe müssen Sie entweder die Instanz als Parameter übergeben oder sie selbst in einem ThreadLocal speichern.

versuchen Sie diesen Link lesen: http://docs.spring.io/spring-data/data-commons/docs/1.6.1.RELEASE/reference/html/repositories.html

Beispiel können Sie

public class SomeClient { 

     @Autowired 
     private PersonRepository repository; 

     public void doSomething() { 
     List<Person> persons = repository.findByLastname("Matthews"); 
     } 
    }