我正在尝试向数据库添加一个新计数，我应该知道用户名是唯一的，所以我创建了一个自定义验证器，但它抛出一个例外：
org.hibernate.AssertionFailure: null id in com.EChallenge.model.Compte entry (don't flush the Session after an exception occurs)
org.hibernate.event.internal.DefaultFlushEntityEventListener.checkId(DefaultFlushEntityEventListener.java:77)
org.hibernate.event.internal.DefaultFlushEntityEventListener.getValues(DefaultFlushEntityEventListener.java:192)
org.hibernate.event.internal.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:152)
org.hibernate.event.internal.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:231)
org.hibernate.event.internal.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:102)
org.hibernate.event.internal.DefaultAutoFlushEventListener.onAutoFlush(DefaultAutoFlushEventListener.java:61)
org.hibernate.internal.SessionImpl.autoFlushIfRequired(SessionImpl.java:1191)
org.hibernate.internal.SessionImpl.list(SessionImpl.java:1257)
org.hibernate.internal.QueryImpl.list(QueryImpl.java:103)
org.hibernate.jpa.internal.QueryImpl.list(QueryImpl.java:573)
org.hibernate.jpa.internal.QueryImpl.getResultList(QueryImpl.java:449)
com.EChallenge.dao.CompteDaoImplementation.finfByUserName(CompteDaoImplementation.java:41)
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:483)
org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:302)
org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136)
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)
org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281)
org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:208)
com.sun.proxy.$Proxy261.finfByUserName(Unknown Source)
com.EChallenge.service.CompteServiceImplementation.nomUtilisateurExiste(CompteServiceImplementation.java:44)
com.EChallenge.validateur.NomUtilisateurUniqueValidator.isValid(NomUtilisateurUniqueValidator.java:32)
com.EChallenge.validateur.NomUtilisateurUniqueValidator.isValid(NomUtilisateurUniqueValidator.java:1)
org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateSingleConstraint(ConstraintTree.java:448)
org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateConstraints(ConstraintTree.java:127)
org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateConstraints(ConstraintTree.java:87)
org.hibernate.validator.internal.metadata.core.MetaConstraint.validateConstraint(MetaConstraint.java:73)
org.hibernate.validator.internal.engine.ValidatorImpl.validateMetaConstraint(ValidatorImpl.java:592)
org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraint(ValidatorImpl.java:555)
org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForDefaultGroup(ValidatorImpl.java:490)
org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForCurrentGroup(ValidatorImpl.java:454)
org.hibernate.validator.internal.engine.ValidatorImpl.validateInContext(ValidatorImpl.java:406)
org.hibernate.validator.internal.engine.ValidatorImpl.validate(ValidatorImpl.java:204)
org.hibernate.cfg.beanvalidation.BeanValidationEventListener.validate(BeanValidationEventListener.java:137)
org.hibernate.cfg.beanvalidation.BeanValidationEventListener.onPreInsert(BeanValidationEventListener.java:95)
org.hibernate.action.internal.EntityIdentityInsertAction.preInsert(EntityIdentityInsertAction.java:214)
org.hibernate.action.internal.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:92)
org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:490)
org.hibernate.engine.spi.ActionQueue.addResolvedEntityInsertAction(ActionQueue.java:195)
org.hibernate.engine.spi.ActionQueue.addInsertAction(ActionQueue.java:179)
org.hibernate.engine.spi.ActionQueue.addAction(ActionQueue.java:214)
org.hibernate.event.internal.AbstractSaveEventListener.addInsertAction(AbstractSaveEventListener.java:324)
org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:288)
org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:194)
org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:125)
org.hibernate.jpa.event.internal.core.JpaPersistEventListener.saveWithGeneratedId(JpaPersistEventListener.java:84)
org.hibernate.event.internal.DefaultPersistEventListener.entityIsTransient(DefaultPersistEventListener.java:206)
org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:149)
org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:75)
org.hibernate.internal.SessionImpl.firePersist(SessionImpl.java:811)
org.hibernate.internal.SessionImpl.persist(SessionImpl.java:784)
org.hibernate.internal.SessionImpl.persist(SessionImpl.java:789)
org.hibernate.jpa.spi.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:1181)
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:483)
org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:293)
com.sun.proxy.$Proxy258.persist(Unknown Source)
com.EChallenge.dao.AbstractDao.persist(AbstractDao.java:40)
com.EChallenge.dao.CompteDaoImplementation.add(CompteDaoImplementation.java:16)
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:483)
org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:302)
org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136)
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)
org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281)
org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:208)
com.sun.proxy.$Proxy261.add(Unknown Source)
com.EChallenge.service.CompteServiceImplementation.add(CompteServiceImplementation.java:21)
com.EChallenge.controller.Inscription.EnregistrerDeveloppeur(Inscription.java:66)
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:483)
org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:222)
org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:814)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:737)
org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:969)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:871)
javax.servlet.http.HttpServlet.service(HttpServlet.java:644)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:845)
javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
我的挑战者豆是
@Entity
@Inheritance(strategy = InheritanceType.JOINED)
@Table(name = "CHALLENGER")
public class Challenger {
@Id
@GeneratedValue( strategy= GenerationType.AUTO)
@Column(name = "challengerId")
private int challengerId;
@Valid
@OneToOne
@JoinColumn(name = "compteId")
private Compte compte;
这是我的计数豆是
@Entity
@Table(name = "COMPTE")
public class Compte {
@Id
@GeneratedValue( strategy= GenerationType.AUTO)
@Column(name = "compteId")
private int compteId;
@NotEmpty
@NomUtilisateurUnique
@Column(name = "nomUtilisateur")
private String nomUtilisateur;
我的验证器类是
public boolean isValid(String nomUtilisateur, ConstraintValidatorContext constraintContext) {
if(nomUtilisateur == null) {
return false;
}
if(!compteService.nomUtilisateurExiste(nomUtilisateur)){
return true;
}
return false;
}
这是我的控制器
@RequestMapping(value = "/InscriptionDeveloppeur", method = RequestMethod.POST)
public String EnregistrerDeveloppeur (@Valid @ModelAttribute("developpeur") Developpeur developpeur,
BindingResult result, Model model) {
if(result.hasErrors()){
return "InscriptionDeveloppeur";
}
compte.add(developpeur.getCompte());
dev.add(developpeur);
return "redirect:/Authentification";
}
我不知道为什么它会考虑＆＃39; COMPTE＆＃39;是空的，我做错了什么，我需要你的帮助。
提前谢谢。