mam problem z uaktualnieniem obiektu, probuje uaktualnic węża:
jego jsp wyglada tak:
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head><h1>Details</h1></head>
<body>
Animal Snake:<br>
<form method="post" modelAttribute="animal">
name:<input type="text" path="name" /> <br>
date of birth:<input type="text" path="dateOfBirth" value="${animalDetails.dateOfBirth}"/> <br>
age:<input type="text" path="age" value="${animalDetails.age}"/> <br>
weight:<input type="text" path="weight" value="${animalDetails.weight}"/> <br>
venomous:<input type="text" path="venomous" value=" ${animalDetails.venomous}"/><br>
length:<input type="text" path="length" value="${animalDetails.length}"/>
<%-- <input type="hidden" path="id" value="${animalDetails.id}"> <br> --%>
<input type="submit" value="update"/>
</form>
<a href="${animalDetails.id}/delete">delete this animal</a>
<a href="${animalDetails.id}/update">update</a>
</body>
w kontrolerze metoda wyglada tak:
@RequestMapping("{animal}/{name}/{id}")
public String getAnimal(Model model, HttpServletRequest request, @PathVariable("animal") String name, @PathVariable("id") int id,
@ModelAttribute("animal") Animal animal){
if(request.getMethod().equalsIgnoreCase("post")){
animalDAO.updateAnimal(animal);
}
model.addAttribute("animalDetails", animalDAO.getAnimalById(id));
return "details"+name;
}
metoda updateAnimal
@Transactional
public void updateAnimal(Animal animal){
entityManager.merge(animal);
}
przy probie wykonania updateAnimal dostaje error:
SEVERE: Servlet.service() for servlet [mvc-dispatcher] in context with path [/crud] threw exception [Request processing failed; nested exception is org.springframework.orm.hibernate3.HibernateObjectRetrievalFailureException: Object [id=null] was not of the specified subclass [kaczynski.impl.Animal] : class of the given object did not match class of persistent copy; nested exception is org.hibernate.WrongClassException: Object [id=null] was not of the specified subclass [kaczynski.impl.Animal] : class of the given object did not match class of persistent copy] with root cause
org.hibernate.WrongClassException: Object [id=null] was not of the specified subclass [kaczynski.impl.Animal] : class of the given object did not match class of persistent copy
at org.hibernate.event.internal.DefaultMergeEventListener.entityIsDetached(DefaultMergeEventListener.java:327)
at org.hibernate.event.internal.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:186)
at org.hibernate.event.internal.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:85)
at org.hibernate.internal.SessionImpl.fireMerge(SessionImpl.java:876)
at org.hibernate.internal.SessionImpl.merge(SessionImpl.java:858)
at org.hibernate.internal.SessionImpl.merge(SessionImpl.java:863)
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.merge(AbstractEntityManagerImpl.java:1196)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:240)
at com.sun.proxy.$Proxy23.merge(Unknown Source)
at kaczynski.DBaccess.AnimalDAO.updateAnimal(AnimalDAO.java:50)
at kaczynski.DBaccess.AnimalDAO$$FastClassBySpringCGLIB$$5f2786e9.invoke(<generated>)
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:720)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:655)
at kaczynski.DBaccess.AnimalDAO$$EnhancerBySpringCGLIB$$7147d5a9.updateAnimal(<generated>)
at kaczynski.web.AnimalsController.getAnimal(AnimalsController.java:117)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:817)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:731)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:968)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:870)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:844)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1095)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
Rozumiem ze rozchodzi sie o schemat mojej bazy danych i sposob w jaki probuje updateowac obiekt,
schemat jest taki ze jest Klasa animal po ktorej dziedzicza snake</code>, a typ dziedziczenia to <code>@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS) tak wiec klasa Snake nie ma klucza Id.
I teraz zastanawiam sie :
a) czy moja diagnoza jest dobra.
b) czy da sie obejsc jakos to, w taki sposob abym nie musial robic 3x metod do update, tak jak to zrobilem w przypadku create z wykorzystaniem DTO.
link do github : https://github.com/filemonczyk/crud