EJB3 - JSF не может обновить сущность, извините за оператор вставки. - PullRequest
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EJB3 - JSF не может обновить сущность, извините за оператор вставки.

0 голосов
/ 04 октября 2010

привет, все новые проблемы, которые я не могу решить. У меня есть 1 сущность ниже 

package com.entity;

import java.io.Serializable;
import javax.persistence.Basic;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Lob;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.Table;

/**
 *
 * @author Kency
 */
@Entity
@Table(name = "about")
@NamedQueries({
    @NamedQuery(name = "About.findAll", query = "SELECT a FROM About a"),
    @NamedQuery(name = "About.findByAboutTitle", query = "SELECT a FROM About a WHERE a.aboutTitle = :aboutTitle")})
public class About implements Serializable {
    private static final long serialVersionUID = 1L;
    @Id
    @Basic(optional = false)
    @Column(name = "about_title")
    private String aboutTitle;
    @Basic(optional = false)
    @Lob
    @Column(name = "content")
    private String content;

    public About() {
    }

   /* public About(String aboutTitle) {
        this.aboutTitle = aboutTitle;
    }*/

    public About(String aboutTitle, String content) {
        this.aboutTitle = aboutTitle;
        this.content = content;
    }
    public About(String aboutTitle) {
        this.aboutTitle = aboutTitle;
    }

    public String getAboutTitle() {
        return aboutTitle;
    }

    public void setAboutTitle(String aboutTitle) {
        this.aboutTitle = aboutTitle;
    }

    public String getContent() {
        return content;
    }

    public void setContent(String content) {
        this.content = content;
    }

    @Override
    public int hashCode() {
        int hash = 0;
        hash += (aboutTitle != null ? aboutTitle.hashCode() : 0);
        return hash;
    }

    @Override
    public boolean equals(Object object) {
        // TODO: Warning - this method won't work in the case the id fields are not set
        if (!(object instanceof About)) {
            return false;
        }
        About other = (About) object;
        if ((this.aboutTitle == null && other.aboutTitle != null) || (this.aboutTitle != null && !this.aboutTitle.equals(other.aboutTitle))) {
            return false;
        }
        return true;
    }

    @Override
    public String toString() {
        return "com.entity.About[aboutTitle=" + aboutTitle + "]";
    }

}

мой bean-компонент без сохранения состояния 

package com.DAO;

import com.entity.About;
import javax.ejb.Stateless;
import javax.ejb.LocalBean;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;

/**
 *
 * @author Kency
 */
@Stateless
@LocalBean
public class AboutDAO {
    @PersistenceContext(unitName = "mcGrawLibPro-ejbPU")
    private EntityManager em;

    public About retrieveAbout(){
       Query query = em.createNamedQuery("About.findAll");
       return (About) query.getSingleResult();
    }

    public void persist(Object object) {
        em.persist(object);
    }

    public About updateAbout(About abouts){
       return em.merge(abouts);

    }

    // Add business logic below. (Right-click in editor and choose
    // "Insert Code > Add Business Method")

}

мой контроллер JSF-управляемых компонентов 

package com.mcgraw.controller;

import com.DAO.AboutDAO;
import com.entity.About;
import java.io.Serializable;
import javax.ejb.EJB;
import javax.faces.application.FacesMessage;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
import javax.faces.bean.ViewScoped;
import javax.faces.context.FacesContext;

/**
 *
 * @author Kency
 */
@ManagedBean
@SessionScoped
public class AboutController implements Serializable{
    @EJB
    private AboutDAO aboutDAO;
    private About about ;
    private String toolbar = "maxi";




    public String getToolbar() {
        return toolbar;
    }

    public void setToolbar(String toolbar) {
        this.toolbar = toolbar;
    }

    public About getAbout() {
        return aboutDAO.retrieveAbout();
    }


    public void setAbout(About about) {
        this.about = about;
    }


    /** Creates a new instance of AboutController */
    public AboutController() {
       about = new About();
    }

    public void updateAbout(){
        about = aboutDAO.updateAbout(about);
        FacesContext context = FacesContext.getCurrentInstance();
        context.addMessage(null, new FacesMessage(FacesMessage.SEVERITY_INFO,
            "", "Update ok"));

    }

}

мой код страницы JSF 

<p:dialog widgetVar="about" header="About">
    <f:view>
        <h:form>
            <h:inputText value="#{aboutController.about.aboutTitle}"/>
            <p:editor value="#{aboutController.about.content}" widgetVar="editor"/>
            <p:commandButton value="Submit" onclick="editor.saveHTML()" action="#{aboutController.updateAbout}"/>
            <p:messages/>
        </h:form>
    </f:view>

</p:dialog>

моя проблема в том, что когда я нажимаю кнопку «Отправить», она не обновляется, она выдает исключение NULL в операторе вставки. Я хочу обновить, но почему она вставляется в базу данных ??у всех есть идея, чтобы решить это?спасибо

моя трассировка стека 

 WARNING: Local Exception Stack: 
Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.0.1.v20100213-r6600): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Column 'about_title' cannot be null
Error Code: 1048
Call: INSERT INTO about (about_title, content) VALUES (?, ?)
        bind => [null, null]
Query: InsertObjectQuery(com.entity.About[aboutTitle=null])
        at org.eclipse.persistence.exceptions.DatabaseException.sqlException(DatabaseException.java:324)
        at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.executeDirectNoSelect(DatabaseAccessor.java:801)
        at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.executeNoSelect(DatabaseAccessor.java:867)
        at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.basicExecuteCall(DatabaseAccessor.java:587)
        at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.executeCall(DatabaseAccessor.java:530)
        at org.eclipse.persistence.internal.sessions.AbstractSession.executeCall(AbstractSession.java:914)
        at org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:205)
        at org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:191)
        at org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.insertObject(DatasourceCallQueryMechanism.java:334)
        at org.eclipse.persistence.internal.queries.StatementQueryMechanism.insertObject(StatementQueryMechanism.java:162)
        at org.eclipse.persistence.internal.queries.StatementQueryMechanism.insertObject(StatementQueryMechanism.java:177)
        at org.eclipse.persistence.internal.queries.DatabaseQueryMechanism.insertObjectForWrite(DatabaseQueryMechanism.java:461)
        at org.eclipse.persistence.queries.InsertObjectQuery.executeCommit(InsertObjectQuery.java:80)
        at org.eclipse.persistence.queries.InsertObjectQuery.executeCommitWithChangeSet(InsertObjectQuery.java:90)
        at org.eclipse.persistence.internal.queries.DatabaseQueryMechanism.executeWriteWithChangeSet(DatabaseQueryMechanism.java:286)
        at org.eclipse.persistence.queries.WriteObjectQuery.executeDatabaseQuery(WriteObjectQuery.java:58)
        at org.eclipse.persistence.queries.DatabaseQuery.execute(DatabaseQuery.java:675)
        at org.eclipse.persistence.queries.DatabaseQuery.executeInUnitOfWork(DatabaseQuery.java:589)
        at org.eclipse.persistence.queries.ObjectLevelModifyQuery.executeInUnitOfWorkObjectLevelModifyQuery(ObjectLevelModifyQuery.java:109)
        at org.eclipse.persistence.queries.ObjectLevelModifyQuery.executeInUnitOfWork(ObjectLevelModifyQuery.java:86)
        at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.internalExecuteQuery(UnitOfWorkImpl.java:2857)
        at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1225)
        at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1207)
        at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1167)
        at org.eclipse.persistence.internal.sessions.CommitManager.commitNewObjectsForClassWithChangeSet(CommitManager.java:197)
        at org.eclipse.persistence.internal.sessions.CommitManager.commitAllObjectsWithChangeSet(CommitManager.java:103)
        at org.eclipse.persistence.internal.sessions.AbstractSession.writeAllObjectsWithChangeSet(AbstractSession.java:3260)
        at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.commitToDatabase(UnitOfWorkImpl.java:1403)
        at org.eclipse.persistence.internal.sessions.RepeatableWriteUnitOfWork.commitToDatabase(RepeatableWriteUnitOfWork.java:547)
        at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.commitToDatabaseWithChangeSet(UnitOfWorkImpl.java:1508)
        at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.issueSQLbeforeCompletion(UnitOfWorkImpl.java:3128)
        at org.eclipse.persistence.internal.sessions.RepeatableWriteUnitOfWork.issueSQLbeforeCompletion(RepeatableWriteUnitOfWork.java:268)
        at org.eclipse.persistence.transaction.AbstractSynchronizationListener.beforeCompletion(AbstractSynchronizationListener.java:157)
        at org.eclipse.persistence.transaction.JTASynchronizationListener.beforeCompletion(JTASynchronizationListener.java:68)
        at com.sun.enterprise.transaction.JavaEETransactionImpl.commit(JavaEETransactionImpl.java:412)
        at com.sun.enterprise.transaction.JavaEETransactionManagerSimplified.commit(JavaEETransactionManagerSimplified.java:837)
        at com.sun.ejb.containers.BaseContainer.completeNewTx(BaseContainer.java:5040)
        at com.sun.ejb.containers.BaseContainer.postInvokeTx(BaseContainer.java:4805)
        at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:2004)
        at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:1955)
        at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:198)
        at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:84)
        at $Proxy114.updateAbout(Unknown Source)
        at com.DAO.__EJB31_Generated__AboutDAO__Intf____Bean__.updateAbout(Unknown Source)
        at com.mcgraw.controller.AboutController.updateAbout(AboutController.java:57)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at com.sun.el.parser.AstValue.invoke(AstValue.java:234)
        at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:297)
        at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:98)
        at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88)
        at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
        at javax.faces.component.UICommand.broadcast(UICommand.java:315)
        at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:775)
        at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1267)
        at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:82)
        at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
        at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:312)
        at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1523)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:343)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:215)
        at com.mcgraw.controller.UserLoginFilter.doFilter(UserLoginFilter.java:60)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:215)
        at com.mcgraw.controller.UserLoginFilter.doFilter(UserLoginFilter.java:60)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:215)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:277)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:188)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:641)
        at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:97)
        at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:85)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:185)
        at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:325)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:226)
        at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:165)
        at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:791)
        at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:693)
        at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:954)
        at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:170)
        at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:135)
        at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:102)
        at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:88)
        at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:76)
        at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:53)
        at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:57)
        at com.sun.grizzly.ContextTask.run(ContextTask.java:69)
        at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:330)
        at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:309)
        at java.lang.Thread.run(Thread.java:619)
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Column 'about_title' cannot be null
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
        at com.mysql.jdbc.Util.handleNewInstance(Util.java:409)
        at com.mysql.jdbc.Util.getInstance(Util.java:384)
        at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1041)
        at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3566)
        at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3498)
        at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1959)
        at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2113)
        at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2568)
        at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2113)
        at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2409)
        at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2327)
        at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2312)
        at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.executeDirectNoSelect(DatabaseAccessor.java:792)
        ... 91 more

столбец содержимое в типе базы данных TEXT

1 Ответ

1 голос
/ 04 октября 2010

Вы связали свой элемент ввода JSF с #{aboutController.about}.Это вызывает метод получения: 

public About getAbout() {
    return aboutDAO.retrieveAbout();
}

, который, в свою очередь, вызывает запрос к БД: 

public About retrieveAbout(){
   Query query = em.createNamedQuery("About.findAll");
   return (About) query.getSingleResult();
}

Таким образом, вы получаете новый объект About каждый раз, когда вызывается метод получения.То, что вы должны сделать, это привязать к конкретному экземпляру «about», а затем отправить этот экземпляр обратно вашему компоненту сеанса без состояния для обновления.Вы сохраняете этот экземпляр "about" как свойство вашего управляемого компонента и возвращаете его с помощью метода получения управляемого компонента.

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