Как исправить ошибку «Отображение GraphModel на экземпляр packagename.User» - PullRequest
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Как исправить ошибку «Отображение GraphModel на экземпляр packagename.User»

0 голосов
/ 23 мая 2019

Я следую "Spring Data Neo4j", но у меня возникла проблема. Когда я добавляю свойство отношений в класс User.class, выдается ошибка Caused by: org.neo4j.ogm.exception.core.MappingException: Error mapping GraphModel to instance of paper.neo4j.entities.User. Если я его уронил, программа работает нормально. 

package paper.neo4j.entities;

import java.util.Set;

import org.neo4j.ogm.annotation.GeneratedValue;
import org.neo4j.ogm.annotation.Id;
import org.neo4j.ogm.annotation.NodeEntity;
import org.neo4j.ogm.annotation.Property;
import org.neo4j.ogm.annotation.Relationship;



@NodeEntity
public class User {
    public User() {}

    @Id
    @GeneratedValue
    private Long userId;

    @Property
    private String name;


    @Relationship(type = "RATED")
    private Set<Rating> ratings;


    @Relationship(type = "TAGED")
    private Set<Taged> tags;

    public Long getUserId() {
        return userId;
    }

    public void setUserId(Long userId) {
        this.userId = userId;
    }

    public String getName() {
        return name;
    }

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

    public Set<Rating> getRatings() {
        return ratings;
    }

    public void setRatings(Set<Rating> ratings) {
        this.ratings = ratings;
    }

    public Set<Taged> getTags() {
        return tags;
    }

    public void setTags(Set<Taged> tags) {
        this.tags = tags;
    }



}


package paper.neo4j.repositories;


import java.util.Map;


import org.springframework.data.neo4j.annotation.Query;
import org.springframework.data.neo4j.repository.Neo4jRepository;
import paper.neo4j.entities.User;

public interface UserRepository extends Neo4jRepository<User, Long> {

    @Query("MATCH (u1:User {userId:{0}})-[r:RATED]->(m:Movie) \r\n" 
            + "    WITH u1, avg(r.rating) AS u1_mean  \r\n"
            + "MATCH (u1)-[r1:RATED]->(m:Movie)<-[r2:RATED]-(u2) \r\n"
            + "    WITH u1, u1_mean, u2, COLLECT({r1: r1, r2: r2}) AS ratings \r\n"
            + "    WHERE size(ratings) > 10  \r\n" 
            + "MATCH (u2)-[r:RATED]->(m:Movie) \r\n"
            + "    WITH u1, u1_mean, u2, avg(r.rating) AS u2_mean, ratings  \r\n" 
            + "UNWIND ratings AS r  \r\n"
            + "WITH \r\n" 
            + "    sum( (r.r1.rating-u1_mean) * (r.r2.rating-u2_mean) ) AS nom,      \r\n"
            + "    sqrt( \r\n" 
            + "        sum( (r.r1.rating - u1_mean)^2) * sum( (r.r2.rating - u2_mean) ^2)\r\n"
            + "    ) AS denom,      \r\n" 
            + "    u1, u2 \r\n" 
            + "WHERE denom <> 0  \r\n"
            + "RETURN u2, nom/denom AS pearson \r\n" 
            + "ORDER BY pearson DESC \r\n" 
            + "LIMIT {1}")
    Map<User, Double> findTopNPearsonByUserIdAndN(Long userId,Integer n);

    @Query("MATCH (u:User {userId:{0}})  \r\n" + 
            "MATCH (u)-[r:RATED]->(m:Movie)  \r\n" + 
            "RETURN avg(r.rating) AS average  \r\n" )
    Double findAvgByUserId(Long userId);



}


package paper.neo4j.controllers;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.web.PageableDefault;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import paper.neo4j.repositories.UserRepository;

@Controller
public class UserController {
    @Autowired
    private UserRepository userRepository;

    private static final Logger logger=LoggerFactory.getLogger(UserController.class);

    @RequestMapping("/user/view")
    public String index(Model model,@PageableDefault(value=1,sort= {"userId"},direction=Sort.Direction.ASC) Pageable pageable) {
        logger.info("user/view index comming...");
        model.addAttribute("users", userRepository.findAll());
        return "user/view";
    }

    @RequestMapping("/user/all")
    public String getAll(Model model) {
        logger.info("user/view getAll() comming...");

        model.addAttribute("users", userRepository.findAll());
        return "user/all";
    }

}


package paper.neo4j.entities;

import java.util.Set;

import org.neo4j.ogm.annotation.GeneratedValue;
import org.neo4j.ogm.annotation.Id;
import org.neo4j.ogm.annotation.NodeEntity;
import org.neo4j.ogm.annotation.Property;
import org.neo4j.ogm.annotation.Relationship;

@NodeEntity
public class Movie {
    public  Movie() {
    }

    @Id
    @GeneratedValue
    private Long movieId;

    @Property
    private String title;

    @Property
    private int runtime;

    @Property
    private String[] countries;

    @Property
    private int year;

    @Relationship(type = "IN_GENRE")
    private Set<Genre> inGenre;

    @Relationship(type = "ACTED_IN", direction = Relationship.INCOMING)
    private Set<Actor> actedIn;

    @Relationship(type = "DIRECTED", direction = Relationship.INCOMING)
    private Set<Director> directed;

    @Relationship(type = "RATED", direction = Relationship.INCOMING)
    private Set<Rating> rated;

    @Relationship(type = "TAGED", direction = Relationship.INCOMING)
    private Set<Taged> taged;

}


package paper.neo4j.entities;

import org.neo4j.ogm.annotation.EndNode;
import org.neo4j.ogm.annotation.GeneratedValue;
import org.neo4j.ogm.annotation.Id;
import org.neo4j.ogm.annotation.Property;
import org.neo4j.ogm.annotation.RelationshipEntity;
import org.neo4j.ogm.annotation.StartNode;

@RelationshipEntity("RATED")
public class Rating {
    public Rating() {
    }

    @Id
    @GeneratedValue
    private Long id;

    public Long getId() {
        return id;
    }

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

    public Double getRating() {
        return rating;
    }

    public void setRating(Double rating) {
        this.rating = rating;
    }

    public Long getTimestamp() {
        return timestamp;
    }

    public void setTimestamp(Long timestamp) {
        this.timestamp = timestamp;
    }

    public User getUser() {
        return user;
    }

    public void setUser(User user) {
        this.user = user;
    }

    public Movie getMovie() {
        return movie;
    }

    public void setMovie(Movie movie) {
        this.movie = movie;
    }

    @Property
    private Double rating;

    @Property
    private Long timestamp;

    @StartNode
    private User user;

    @EndNode
    private Movie movie;
}


package paper.neo4j.entities;

import org.neo4j.ogm.annotation.EndNode;
import org.neo4j.ogm.annotation.GeneratedValue;
import org.neo4j.ogm.annotation.Id;
import org.neo4j.ogm.annotation.Property;
import org.neo4j.ogm.annotation.RelationshipEntity;
import org.neo4j.ogm.annotation.StartNode;

@RelationshipEntity("TAGED")
public class Taged {
    public Taged() {
    }

    @Id
    @GeneratedValue
    private Long id;

    public Long getId() {
        return id;
    }

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

    public String getTag() {
        return tag;
    }

    public void setTag(String tag) {
        this.tag = tag;
    }

    public Long getTimestamp() {
        return timestamp;
    }

    public void setTimestamp(Long timestamp) {
        this.timestamp = timestamp;
    }

    public User getUser() {
        return user;
    }

    public void setUser(User user) {
        this.user = user;
    }

    public Movie getMovie() {
        return movie;
    }

    public void setMovie(Movie movie) {
        this.movie = movie;
    }

    @Property
    private String tag;

    @Property
    private Long timestamp;

    @StartNode
    private User user;

    @EndNode
    private Movie movie;
}


2019-05-23 17:21:03.834 ERROR 12124 --- [nio-8086-exec-1] p.neo4j.controllers.ExceptionController  : Error mapping GraphModel to instance of paper.neo4j.entities.User; nested exception is org.neo4j.ogm.exception.core.MappingException: Error mapping GraphModel to instance of paper.neo4j.entities.User
org.springframework.dao.InvalidDataAccessApiUsageException: Error mapping GraphModel to instance of paper.neo4j.entities.User; nested exception is org.neo4j.ogm.exception.core.MappingException: Error mapping GraphModel to instance of paper.neo4j.entities.User
    at org.springframework.data.neo4j.transaction.SessionFactoryUtils.convertOgmAccessException(SessionFactoryUtils.java:126)
    at org.springframework.data.neo4j.repository.support.Neo4jPersistenceExceptionTranslator.translateExceptionIfPossible(Neo4jPersistenceExceptionTranslator.java:31)
    at org.springframework.dao.support.ChainedPersistenceExceptionTranslator.translateExceptionIfPossible(ChainedPersistenceExceptionTranslator.java:61)
    at org.springframework.dao.support.DataAccessUtils.translateIfNecessary(DataAccessUtils.java:242)
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:153)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:93)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
    at org.springframework.data.repository.core.support.SurroundingTransactionDetectorMethodInterceptor.invoke(SurroundingTransactionDetectorMethodInterceptor.java:61)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212)
    at com.sun.proxy.$Proxy421.findAll(Unknown Source)
    at paper.neo4j.controllers.UserController.getAll(UserController.java:33)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415)
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:748)
Caused by: org.neo4j.ogm.exception.core.MappingException: Error mapping GraphModel to instance of paper.neo4j.entities.User
    at org.neo4j.ogm.context.GraphEntityMapper.mapEntities(GraphEntityMapper.java:217)
    at org.neo4j.ogm.context.GraphEntityMapper.map(GraphEntityMapper.java:138)
    at org.neo4j.ogm.context.GraphEntityMapper.map(GraphEntityMapper.java:94)
    at org.neo4j.ogm.session.delegates.LoadByTypeDelegate.lambda$loadAll$0(LoadByTypeDelegate.java:107)
    at org.neo4j.ogm.session.Neo4jSession.doInTransaction(Neo4jSession.java:574)
    at org.neo4j.ogm.session.Neo4jSession.doInTransaction(Neo4jSession.java:558)
    at org.neo4j.ogm.session.delegates.LoadByTypeDelegate.loadAll(LoadByTypeDelegate.java:94)
    at org.neo4j.ogm.session.delegates.LoadByTypeDelegate.loadAll(LoadByTypeDelegate.java:118)
    at org.neo4j.ogm.session.Neo4jSession.loadAll(Neo4jSession.java:192)
    at sun.reflect.GeneratedMethodAccessor356.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:282)
    at org.springframework.data.neo4j.transaction.SharedSessionCreator$SharedSessionInvocationHandler.lambda$invoke$0(SharedSessionCreator.java:108)
    at org.springframework.data.neo4j.transaction.SharedSessionCreator$SharedSessionInvocationHandler.invokeInTransaction(SharedSessionCreator.java:139)
    at org.springframework.data.neo4j.transaction.SharedSessionCreator$SharedSessionInvocationHandler.invoke(SharedSessionCreator.java:110)
    at com.sun.proxy.$Proxy76.loadAll(Unknown Source)
    at org.springframework.data.neo4j.repository.support.SimpleNeo4jRepository.findAll(SimpleNeo4jRepository.java:154)
    at org.springframework.data.neo4j.repository.support.SimpleNeo4jRepository.findAll(SimpleNeo4jRepository.java:149)
    at sun.reflect.GeneratedMethodAccessor355.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.data.repository.core.support.RepositoryComposition$RepositoryFragments.invoke(RepositoryComposition.java:359)
    at org.springframework.data.repository.core.support.RepositoryComposition.invoke(RepositoryComposition.java:200)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$ImplementationMethodExecutionInterceptor.invoke(RepositoryFactorySupport.java:644)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:608)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.lambda$invoke$3(RepositoryFactorySupport.java:595)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:595)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
    at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:59)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:294)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:98)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:139)
    ... 62 more
Caused by: java.lang.IllegalArgumentException: array element type mismatch
    at java.lang.reflect.Array.set(Native Method)
    at org.neo4j.ogm.metadata.reflect.EntityAccessManager.merge(EntityAccessManager.java:92)
    at org.neo4j.ogm.metadata.reflect.EntityAccessManager.merge(EntityAccessManager.java:56)
    at org.neo4j.ogm.context.GraphEntityMapper.writeProperty(GraphEntityMapper.java:311)
    at org.neo4j.ogm.context.GraphEntityMapper.setProperties(GraphEntityMapper.java:277)
    at org.neo4j.ogm.context.GraphEntityMapper.mapNodes(GraphEntityMapper.java:239)
    at org.neo4j.ogm.context.GraphEntityMapper.mapEntities(GraphEntityMapper.java:212)
    ... 97 more

Я посетил этот URL 'http://localhost:8086/user/all',but фактический вывод - ошибка.

...