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问题:

非统一查询结果异常Spring JPA

龙俊德
2023-03-14

我在项目中使用Spring数据JPA。当我要求一份特定导演制作的电影列表时,我得到:

javax.persistence.NonUniqueResultException: query did not return a unique result: 11
    at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:128) ~[hibernate-core-5.6.1.Final.jar:5.6.1.Final]
    at org.hibernate.query.internal.AbstractProducedQuery.getSingleResult(AbstractProducedQuery.java:1672) ~[hibernate-core-5.6.1.Final.jar:5.6.1.Final]
    at org.hibernate.query.criteria.internal.compile.CriteriaQueryTypeQueryAdapter.getSingleResult(CriteriaQueryTypeQueryAdapter.java:111) ~[hibernate-core-5.6.1.Final.jar:5.6.1.Final]
    at org.springframework.data.jpa.repository.query.JpaQueryExecution$SingleEntityExecution.doExecute(JpaQueryExecution.java:198) ~[spring-data-jpa-2.6.0.jar:2.6.0]
    at org.springframework.data.jpa.repository.query.JpaQueryExecution.execute(JpaQueryExecution.java:90) ~[spring-data-jpa-2.6.0.jar:2.6.0]
    at org.springframework.data.jpa.repository.query.AbstractJpaQuery.doExecute(AbstractJpaQuery.java:155) ~[spring-data-jpa-2.6.0.jar:2.6.0]
    at org.springframework.data.jpa.repository.query.AbstractJpaQuery.execute(AbstractJpaQuery.java:143) ~[spring-data-jpa-2.6.0.jar:2.6.0]
    at org.springframework.data.repository.core.support.RepositoryMethodInvoker.doInvoke(RepositoryMethodInvoker.java:137) ~[spring-data-commons-2.6.0.jar:2.6.0]
    at org.springframework.data.repository.core.support.RepositoryMethodInvoker.invoke(RepositoryMethodInvoker.java:121) ~[spring-data-commons-2.6.0.jar:2.6.0]
    at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.doInvoke(QueryExecutorMethodInterceptor.java:159) ~[spring-data-commons-2.6.0.jar:2.6.0]
    at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.invoke(QueryExecutorMethodInterceptor.java:138) ~[spring-data-commons-2.6.0.jar:2.6.0]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.13.jar:5.3.13]
    at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:80) ~[spring-data-commons-2.6.0.jar:2.6.0]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.13.jar:5.3.13]
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:123) ~[spring-tx-5.3.13.jar:5.3.13]
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:388) ~[spring-tx-5.3.13.jar:5.3.13]
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:119) ~[spring-tx-5.3.13.jar:5.3.13]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.13.jar:5.3.13]
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:137) ~[spring-tx-5.3.13.jar:5.3.13]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.13.jar:5.3.13]
    at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:145) ~[spring-data-jpa-2.6.0.jar:2.6.0]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.13.jar:5.3.13]
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97) ~[spring-aop-5.3.13.jar:5.3.13]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.13.jar:5.3.13]
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:215) ~[spring-aop-5.3.13.jar:5.3.13]
    at com.sun.proxy.$Proxy113.findDirectorsByDirectorId(Unknown Source) ~[na:na]
    at net.yukitteru.what_to_watch.controller.MovieController.showMovies(MovieController.java:33) ~[main/:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
    at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
    at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) ~[spring-web-5.3.13.jar:5.3.13]
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150) ~[spring-web-5.3.13.jar:5.3.13]
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117) ~[spring-webmvc-5.3.13.jar:5.3.13]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895) ~[spring-webmvc-5.3.13.jar:5.3.13]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.13.jar:5.3.13]
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.13.jar:5.3.13]
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1067) ~[spring-webmvc-5.3.13.jar:5.3.13]
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) ~[spring-webmvc-5.3.13.jar:5.3.13]
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.13.jar:5.3.13]
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.3.13.jar:5.3.13]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:655) ~[tomcat-embed-core-9.0.55.jar:4.0.FR]
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.13.jar:5.3.13]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) ~[tomcat-embed-core-9.0.55.jar:4.0.FR]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.55.jar:9.0.55]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
    at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.13.jar:5.3.13]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.13.jar:5.3.13]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
    at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.13.jar:5.3.13]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.13.jar:5.3.13]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.13.jar:5.3.13]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.13.jar:5.3.13]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:540) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:382) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:895) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1722) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
    at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
    at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
    at java.base/java.lang.Thread.run(Thread.java:829) ~[na:na]

电影拍摄地点:

@Repository
public interface MovieRepository extends JpaRepository<Movies, Integer> {
    List<Movies> findAllByDirectorsById(Directors director);
}

董事报告人:

@Repository
public interface DirectorRepository extends JpaRepository<Directors, Integer> {
    Directors findDirectorsByDirectorId(Persons directorId);
}

人员存储库:

@Repository
public interface PersonRepository extends JpaRepository<Persons, Integer> {
    Persons findPersonsByName(String name);
}

电影控制器:

@Controller
@RequestMapping("/movies")
public class MovieController {
    private final DirectorRepository directorRepository;
    private final MovieRepository movieRepository;
    private final PersonRepository personRepository;

    @Autowired
    public MovieController(DirectorRepository directorRepository, MovieRepository movieRepository, PersonRepository personRepository) {
        this.directorRepository = directorRepository;
        this.movieRepository = movieRepository;
        this.personRepository = personRepository;
    }


    @GetMapping("")
    public List<Movies> showMovies() {
        List<Movies> m = movieRepository.findAllByDirectorsById(
                directorRepository.findDirectorsByDirectorId(
                        personRepository.findPersonsByName("Mel Brooks")));
        return m;
    }

}

我不明白为什么当sql查询一切正常工作时,但是当使用表达式搜索存储库时,它却不能正常工作。在阅读了类似的问题后,我没有找到任何解决我问题的东西。

董事实体:

@Entity
@NoArgsConstructor
@Setter
@EqualsAndHashCode
public class Directors {
    private Integer id;
    private Movies movieId;
    private Persons directorId;

    @Id
    @Column(name = "id", nullable = false)
    public Integer getId() {
        return id;
    }

    @ManyToOne
    @JsonIgnore
    @JoinColumn(name = "movie_id", referencedColumnName = "id")
    public Movies getMovieId() {
        return movieId;
    }

    @ManyToOne
    @JsonIgnore
    @JoinColumn(name = "director_id", referencedColumnName = "id")
    public Persons getDirectorId() {
        return directorId;
    }

}

个人实体:

@Entity
@NoArgsConstructor
@Setter
@EqualsAndHashCode
public class Persons {
    private Integer id;
    private String name;
    private Set<Directors> directorsById;
    private Set<Actors> actorsById;

    @Id
    @Column(name = "id", nullable = false)
    public Integer getId() {
        return id;
    }

    @Basic
    @Column(name = "name", nullable = true, length = -1)
    public String getName() {
        return name;
    }

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

    @OneToMany(mappedBy = "directorId")
    public Set<Directors> getDirectorsById() {
        return directorsById;
    }

    @OneToMany(mappedBy = "personId")
    public Set<Actors> getActorsById() {
        return actorsById;
    }

}

电影实体:

@Entity
@NoArgsConstructor
@AllArgsConstructor
@Setter
@EqualsAndHashCode
public class Movies {
    private Integer id;
    private String title;
    private String releaseDate;
    private Long budget;
    private Long revenue;
    private Double popularity;
    private Integer runtime;
    private Double rating;
    private String overview;
    private Languages originalLanguage;
    private Collections belongsToCollection;
    private Set<MoviesGenres> moviesGenresById;
    private Set<Directors> directorsById;
    private Set<Actors> actorsById;
    private Set<MoviesKeywords> moviesKeywordsById;
    private Set<SpokenLanguages> spokenLanguagesById;
    private Set<ProductionCountries> productionCountriesById;
    private Set<MoviesProductionCompanies> moviesProductionCompaniesById;

    
    @Id
    @Column(name = "id", nullable = false)
    public Integer getId() {
        return id;
    }

    @Basic
    @Column(name = "title", nullable = true, length = -1)
    public String getTitle() {
        return title;
    }

    @Basic
    @Column(name = "release_date", nullable = true, length = -1)
    public String getReleaseDate() {
        return releaseDate;
    }

    @Basic
    @Column(name = "budget", nullable = true)
    public Long getBudget() {
        return budget;
    }

    @Basic
    @Column(name = "revenue", nullable = true)
    public Long getRevenue() {
        return revenue;
    }

    @Basic
    @Column(name = "popularity", nullable = true, precision = 0)
    public Double getPopularity() {
        return popularity;
    }

    @Basic
    @Column(name = "runtime", nullable = true)
    public Integer getRuntime() {
        return runtime;
    }

    @Basic
    @Column(name = "rating", nullable = true, precision = 0)
    public Double getRating() {
        return rating;
    }

    @Basic
    @Column(name = "overview", nullable = true, length = -1)
    public String getOverview() {
        return overview;
    }

    @ManyToOne
    @JsonIgnore 
    @JoinColumn(name = "original_language", referencedColumnName = "id")
    public Languages getOriginalLanguage() {
        return originalLanguage;
    }

    @ManyToOne
    @JsonIgnore 
    @JoinColumn(name = "belongs_to_collection", referencedColumnName = "id")
    public Collections getBelongsToCollection() {
        return belongsToCollection;
    }

    @OneToMany(mappedBy = "movieId")
    public Set<MoviesGenres> getMoviesGenresById() {
        return moviesGenresById;
    }

    @OneToMany(mappedBy = "movieId")
    public Set<Directors> getDirectorsById() {
        return directorsById;
    }

    @OneToMany(mappedBy = "movieId")
    public Set<Actors> getActorsById() {
        return actorsById;
    }

    @OneToMany(mappedBy = "movieId")
    public Set<MoviesKeywords> getMoviesKeywordsById() {
        return moviesKeywordsById;
    }


    @OneToMany(mappedBy = "movieId")
    public Set<SpokenLanguages> getSpokenLanguagesById() {
        return spokenLanguagesById;
    }

    @OneToMany(mappedBy = "movieId")
    public Set<ProductionCountries> getProductionCountriesById() {
        return productionCountriesById;
    }

    @OneToMany(mappedBy = "movieId")
    public Set<MoviesProductionCompanies> getMoviesProductionCompaniesById() {
        return moviesProductionCompaniesById;
    }
}

共有2个答案

宿丰
2023-03-14

问题是一个可以是多个导演(也就是说,导演了很多电影)。

因此,DirectorRepository是错误的:

@Repository
public interface DirectorRepository extends JpaRepository<Directors, Integer> {
    Directors findDirectorsByDirectorId(Persons directorId);
}

这意味着一个最多只能是一部电影的导演

如果是不止一部电影的导演,该方法应该返回什么?它应该随机选择一个吗?那不是很有用!这会让你想知道:为什么MoviRepository.findAllByDirectorsById()只返回一部电影?

这就是为什么决定找到比它可以返回的结果更多的查询方法会抛出NonUniqueResultException

如何修复它?您需要声明findDirectorsByDirectorId()方法,以便它可以返回多个导演

@Repository
public interface DirectorRepository extends JpaRepository<Directors, Integer> {
    List<Directors> findDirectorsByDirectorId(Persons directorId);
}

反过来,您需要声明方法MovieRepository。findAllByDirectorsById(),以便它可以接受多个控制器

@Repository
public interface MovieRepository extends JpaRepository<Movies, Integer> {
    List<Movies> findAllByDirectorsIn(List<Directors> director);
}
咸琪
2023-03-14

PERERSRespository.findByPERosnName()有多个结果,即一个列表,因为该方法的返回类型不是列表,这就是导致问题的原因。

检查数据库,Persons表中必须有更多同名数据。

尝试创建一个方法人员列表查找人员ByNameList(字符串名称)。检查这是否实际上返回一个只有1个值的具有相同参数的列表。

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