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Je suis nouveau à hiberner et j'ai du mal à comprendre HQL. Ci-dessous est mon DAO, qui renvoie l'exception de requête. J'apprécierais vraiment toute aide sur ceci, j'ai traversé ce site et les docs officiels et ne peux toujours pas le faire fonctionner. Merci!!QueryException: tentative illégale de déréférencer la collection Hibernate Select w/sous-classes
Pour votre information: la cartographie est .xml et ne peut être commuté à JPA
Stack Trace:
type Exception report
message Request processing failed; nested exception is org.hibernate.QueryException: illegal attempt to dereference collection [feature0_.id.actors] with element property reference [name] [SELECT f from ar.edu.uces.progweb2.springmvc.model.Feature as f where f.name like :term or f.actors.name like :term or f.genre.name like :term order by f.name ASC ]
description The server encountered an internal error that prevented it from fulfilling this request.
exception
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.hibernate.QueryException: illegal attempt to dereference collection [feature0_.id.actors] with element property reference [name] [SELECT f from ar.edu.uces.progweb2.springmvc.model.Feature as f where f.name like :term or f.actors.name like :term or f.genre.name like :term order by f.name ASC ]
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:894)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:789)
javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
root cause
org.hibernate.QueryException: illegal attempt to dereference collection [feature0_.id.actors] with element property reference [name] [SELECT f from ar.edu.uces.progweb2.springmvc.model.Feature as f where f.name like :term or f.actors.name like :term or f.genre.name like :term order by f.name ASC ]
org.hibernate.hql.internal.ast.tree.DotNode$1.buildIllegalCollectionDereferenceException(DotNode.java:68)
org.hibernate.hql.internal.ast.tree.DotNode.checkLhsIsNotCollection(DotNode.java:550)
org.hibernate.hql.internal.ast.tree.DotNode.resolve(DotNode.java:246)
org.hibernate.hql.internal.ast.tree.FromReferenceNode.resolve(FromReferenceNode.java:118)
org.hibernate.hql.internal.ast.tree.FromReferenceNode.resolve(FromReferenceNode.java:114)
org.hibernate.hql.internal.ast.HqlSqlWalker.resolve(HqlSqlWalker.java:881)
org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.expr(HqlSqlBaseWalker.java:1264)
org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.exprOrSubquery(HqlSqlBaseWalker.java:4297)
org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.comparisonExpr(HqlSqlBaseWalker.java:3913)
org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.logicalExpr(HqlSqlBaseWalker.java:1947)
org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.logicalExpr(HqlSqlBaseWalker.java:1900)
org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.logicalExpr(HqlSqlBaseWalker.java:1897)
org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.whereClause(HqlSqlBaseWalker.java:794)
org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:595)
org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:299)
org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:247)
org.hibernate.hql.internal.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:248)
org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:183)
org.hibernate.hql.internal.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:136)
org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:105)
org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:80)
org.hibernate.engine.query.spi.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:168)
org.hibernate.internal.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:219)
org.hibernate.internal.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:197)
org.hibernate.internal.SessionImpl.createQuery(SessionImpl.java:1736)
ar.edu.uces.progweb2.springmvc.dao.FeatureDAO.search(FeatureDAO.java:98)
ar.edu.uces.progweb2.springmvc.dao.FeatureDAO$$FastClassByCGLIB$$3247faf2.invoke(<generated>)
net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:191)
org.springframework.aop.framework.Cglib2AopProxy$CglibMethodInvocation.invokeJoinpoint(Cglib2AopProxy.java:689)
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:622)
ar.edu.uces.progweb2.springmvc.dao.FeatureDAO$$EnhancerByCGLIB$$f55db758.search(<generated>)
ar.edu.uces.progweb2.springmvc.controller.AppController.buscar(AppController.java:229)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:498)
org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:213)
org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:126)
org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:96)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:617)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:578)
org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:923)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:789)
javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
note The full stack trace of the root cause is available in the Apache Tomcat/8.0.37 logs.
HBM Feature:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Qualified Class Names -->
<hibernate-mapping default-lazy="false">
<class name="ar.edu.uces.progweb2.springmvc.model.Feature" table="feature">
<id name="id" type="int" column="id">
<generator class="native"/>
</id>
<discriminator column="feature_type" type="string"/>
<property name="name" column="name"/>
<property name="runtime" column="runtime"/>
<property name="coverImage" column="cover_image"/>
<property name="storyline" column="storyline"/>
<set name="showtimes" inverse="true" cascade="all" fetch="join">
<key column="feature_id"/>
<one-to-many class="ar.edu.uces.progweb2.springmvc.model.Showtime" entity-name="ar.edu.uces.progweb2.springmvc.model.Showtime"/>
</set>
<subclass name="ar.edu.uces.progweb2.springmvc.model.Movie" discriminator-value="M">
<set name="actors" inverse="true" cascade="all" fetch="join">
<key column="feature_id"/>
<one-to-many class="ar.edu.uces.progweb2.springmvc.model.Actor" entity-name="ar.edu.uces.progweb2.springmvc.model.Actor"/>
</set>
</subclass>
<subclass name="ar.edu.uces.progweb2.springmvc.model.Documentary" discriminator-value="D">
<many-to-one name="genre"
column="documentary_genre_id"
not-null="true" fetch="join"/>
</subclass>
</class>
</hibernate-mapping>
Classes de modèle (métrage, Film, Documentaire)
Caractéristique:
public abstract class Feature {
private int id;
private String name;
private int runtime;
private byte[] coverImage;
private String storyline;
private String featureType;
private Set<Showtime> showtimes;
public abstract boolean isMovie();
public abstract boolean isDocumentary();
public Feature(){
this.showtimes = new HashSet<Showtime>();
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getRuntime() {
return runtime;
}
public void setRuntime(int runtime) {
this.runtime = runtime;
}
public byte[] getCoverImage() {
return coverImage;
}
public void setCoverImage(byte[] coverImage) {
this.coverImage = coverImage;
}
public String getStoryline() {
return storyline;
}
public void setStoryline(String storyline) {
this.storyline = storyline;
}
public String getFeatureType() {
return featureType;
}
public void setFeatureType(String featureType) {
this.featureType = featureType;
}
public Set<Showtime> getShowtimes() {
return showtimes;
}
public void setShowtimes(Set<Showtime> showtimes) {
this.showtimes = showtimes;
}
}
Film:
public class Movie extends Feature {
private Set<Actor> actors;
@Override
public boolean isMovie() {
return true;
}
public Movie(){
actors = new HashSet<Actor>();
}
}
Documentaire:
public class Documentary extends Feature{
private Genre genre;
@Override
public boolean isDocumentary(){
return true;
}
@Override
public boolean isMovie() {
return false;
}
public Documentary(){
this.genre = new Genre();
}
public Genre getGenre() {
return genre;
}
public void setGenre(Genre genre) {
this.genre = genre;
}
}
OAC:
public List<Feature> search(SearchForm sf){
StringBuffer query = new StringBuffer("SELECT f ");
Map<String, Object> params = new HashMap<>();
Session session = sessionFactory.getCurrentSession();
switch (sf.getFeatureType()){ //0: Both, 1: Commercial Film, 2: Documentary
case 0:
query.append("from Feature as f ");
if (sf.getTerm() != null && !sf.getTerm().isEmpty()){
query.append("where f.name like :term or f.actors.name like :term or f.genre.name like :term ");
params.put("term","%"+ sf.getTerm() + "%");
}
break;
case 1:
if (sf.getTerm() != null && !sf.getTerm().isEmpty()){
query.append("from Movie m left join m.actors a where (a.name like :term or m.name like :term) ");
params.put("term","%"+ sf.getTerm() + "%");
} else {
query.append("from Movie m ");
}
break;
case 2:
if (sf.getTerm() != null && !sf.getTerm().isEmpty()){
query.append("from Documentary d left join d.genre g where (g.name like :term or d.name like :term) ");
params.put("term", "%"+ sf.getTerm()+"%");
} else {
query.append("from Documentary d left join d.genre g ");
}
break;
}
switch (sf.getOrder()){
case "nameDesc":
query.append("order by f.name DESC ");
break;
default:
query.append("order by f.name ASC ");
break;
}
System.out.println("Query: " + query.toString());
Query q = session.createQuery(query.toString());
Iterator<String> iter = params.keySet().iterator();
while(iter.hasNext()){
String k = iter.next();
Object o = params.get(k);
q.setParameter(k, o);
}
q.setFirstResult(this.resultsPerPage * sf.getPage());
q.setMaxResults(this.resultsPerPage);
//System.out.println("Search OK!");
return q.list();
}