Primefaces Bean 对象未正确更新

Question

我遇到了以下问题。我有一个XHTML：

<ui:composition xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:p="http://primefaces.org/ui"
template="../layout.xhtml">
<ui:define name="header">
<div id="header">
Abfragen
</div>
</ui:define>
<ui:define name="main">
<p:toolbar>
<p:toolbarGroup>
<p:commandButton value="Neu" icon="pi pi-plus" actionListener="#{abfrageHandler.newAbfrage}"
update="manage-queries-content" oncomplete="PF('manageQueriesDialog').show()"
styleClass="ui-button-success" style="margin-right: .5rem">
<p:resetInput target=":ucmdbform:ucmdbtab:manage-ucmdb-queries-content"/>
</p:commandButton>
</p:toolbarGroup>
</p:toolbar>

<p:dataTable id="dt-queries" widgetVar="dtQueries" reflow="true" showGridlines="true" size="small"
var="querie" value="#{abfrageHandler.abfragen}">
<p:column headerText="Abfrage">
<h:outputText value="#{querie.name}" />
</p:column>
<p:column headerText="TQL">
<h:outputText value="#{querie.tql}" />
</p:column>
<p:column headerText="Zyklus">
<h:outputText value="#{querie.zyklus}" />
</p:column>
<p:column headerText="Typ">
<h:outputText value="#{querie.typ}" />
</p:column>
<p:column exportable="false">
<p:commandButton icon="pi pi-pencil" update="manage-queries-content"
oncomplete="PF('manageQueriesDialog').show()"
styleClass="edit-button rounded-button ui-button-success" process="@this">
<f:setPropertyActionListener value="#{querie}" target="#{abfrageHandler.selected}"/>
<p:resetInput target="manage-queries-content"/>
</p:commandButton>
<p:commandButton icon="pi pi-search" actionListener="#{abfrageHandler.startAbfrage(querie)}"
styleClass="edit-button rounded-button ui-button-success" process="@this">
</p:commandButton>
<p:commandButton class="ui-button-warning rounded-button" icon="pi pi-trash" process="@this"
oncomplete="PF('deleteQuerieDialog').show()">
<f:setPropertyActionListener value="#{querie}" target="#{abfrageHandler.selected}"/>
</p:commandButton>
</p:column>
</p:dataTable>

<p:dialog header="Abfrage" showEffect="fade" modal="true" width="600px"
widgetVar="manageQueriesDialog" responsive="true">
<p:outputPanel id="manage-queries-content" class="ui-fluid">
<p:outputPanel rendered="#{not empty abfrageHandler.selected}">
<div class="p-field">
<p:outputLabel for="abfName">Name</p:outputLabel>
<p:inputText id="abfName" value="#{abfrageHandler.selected.name}" required="true"/>
</div>
<div class="p-field">
<p:outputLabel for="abfTql">TQL</p:outputLabel>
<p:inputText id="abfTql" value="#{abfrageHandler.selected.tql}" required="true"/>
</div>
<div class="p-field">
<p:outputLabel for="abfZyklus">Zyklus</p:outputLabel>
<p:inputText id="abfZyklus" value="#{abfrageHandler.selected.zyklus}" required="true"/>
</div>
<div class="p-field">
<p:outputLabel for="@next">Abfrageart</p:outputLabel>
<p:selectOneMenu id="abfTyp" value="#{abfrageHandler.selected.typ}" required="false">
<f:selectItem itemLabel="Eins wählen" itemValue=""/>
<f:selectItems value="#{abfrageHandler.requestResolutions}" var="reso"
itemLabel="#{reso.toString()}" itemValue="#{reso}"/>
</p:selectOneMenu>
</div>
</p:outputPanel>
</p:outputPanel>

<f:facet name="footer">
<p:commandButton value="Speichern" icon="pi pi-check" actionListener="#{abfrageHandler.saveAbfrage}"
update="manage-queries-content" process="manage-queries-content @this"/>
<p:commandButton value="Abbruch" icon="pi pi-times" onclick="PF('manageQueriesDialog').hide()"
class="ui-button-secondary"/>
</f:facet>
</p:dialog>

<p:confirmDialog widgetVar="deleteQuerieDialog" showEffect="fade" width="300"
message="TQL wirklich löschen?" header="Bestätigen" severity="warn">
<p:commandButton value="Ja" icon="pi pi-check" actionListener="#{abfrageHandler.deleteParameter}"
process="@this" oncomplete="PF('deleteQuerieDialog').hide()"/>
<p:commandButton value="Nein" type="button" styleClass="ui-button-secondary" icon="pi pi-times"
onclick="PF('deleteQuerieDialog').hide()"/>
</p:confirmDialog>          

</ui:define>
</ui:composition>

以及后端中的以下bean：

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;
import javax.annotation.PostConstruct;
import javax.faces.view.ViewScoped;
import javax.inject.Named;
import org.primefaces.PrimeFaces;
import main.java.ucmdbtool.RequestResolutions;
import main.java.ucmdbtool.UcmdbAbfrageInteface;
import main.java.ucmdbtool.table.Abfrage;
import main.java.ucmdbtool.table.UcmdbAbfTableHandler;
@SuppressWarnings("serial")
@Named("abfrageHandler")
@ViewScoped
public class AbfrageHandler implements Serializable {
private List<Abfrage> abfragen = new ArrayList<>();
private Abfrage selected;
private RequestResolutions[] requestResolutions;

@PostConstruct
private void init() {
abfragen = UcmdbAbfTableHandler.getAbfragen();
requestResolutions = RequestResolutions.values();
}
public void newAbfrage() {
selected = new Abfrage();
}
public void saveAbfrage() {
if (selected.getPk() == null) {
selected.setPk(UUID.randomUUID());
UcmdbAbfTableHandler.insertAbfrage(selected);
abfragen.add(selected);
}
else {
UcmdbAbfTableHandler.updateAbfrage(selected);
}
PrimeFaces.current().executeScript("PF('manageQueriesDialog').hide()");
PrimeFaces.current().ajax().update("dt-queries");
}

public void startAbfrage(Abfrage abf) {
UcmdbAbfrageInteface.doRequest(abf);
}

public void deleteAbfrage() {
if(selected != null) {
UcmdbAbfTableHandler.deleteAbfrage(selected);
abfragen.remove(selected);
}
PrimeFaces.current().ajax().update("dt-queries");
}

public List<Abfrage> getAbfragen() { return abfragen; }
public Abfrage getSelected() { return selected; }
public RequestResolutions[] getRequestResolutions() { return requestResolutions; }
public void setSelected(Abfrage selected) { this.selected = selected; }
}

我把所有进口商品都包括在内，因为可能有一个是假的。我的问题是，如果我点击new，对话框将保持为空，因为他认为对象是空的。当我点击编辑按钮时，对象已加载，但我无法保存它，因为abfTyp为空(它是必需的="true"(，在我将required设置为false后，我可以保存，但我的对象有旧数据，而不是我更改的日期。我有一个几乎相似的页面，运行良好，我找不到区别。RequestResolutions是一个愚蠢的ENUM，没有任何功能。

Answer 1

使用"neu"；因为你创建了一个新版本的"；选择"；每次。旧数据重新出现在"；编辑"；因为上次验证失败，但您立即关闭了对话框。然后使用p:resetInput，它会重置回存储的值。如果selectList值为空，则表示来自数据源的内容与您提供的枚举选择列表中的任何值都不匹配。

我在让样本工作时遇到了一些问题。。。缺少表单，更新=引用不正确。但我认为主要的设计问题是，您没有在对话框中显示任何验证错误，只是立即关闭对话框窗口。顺便说一句，您应该在命令按钮上使用action=，而不是actionListener=。请参阅此处了解原因。在执行操作方法之前，所有字段验证都将通过。

我建议修改如下：

<p:commandButton value="Neu" icon="pi pi-plus" action="#{abfrageHandler.newAbfrage}"
update=":ucmdbform:manage-queries-content" 
oncomplete="PF('manageQueriesDialog').show()"
styleClass="ui-button-success" style="margin-right: .5rem">
<!--    <p:resetInput target=":ucmdbform:manage-queries-content"/> -->
</p:commandButton>
.
.
<p:commandButton value="Speichern" icon="pi pi-check" 
action="#{abfrageHandler.saveAbfrage}"
update=":ucmdbform:dt-queries :ucmdbform:manage-queries-content" 
oncomplete="if ( args.saved == 1 ) { PF('manageQueriesDialog').hide()};"/>

加上所有actionListeners="..."->action="..."；加上将p:message添加到所有可能验证失败的对话框字段中。

public void saveAbfrage() {
if (selected.getPk() == null) {
selected.setPk(UUID.randomUUID());
UcmdbAbfTableHandler.insertAbfrage(selected);        
abfragen.add(selected);
} else {
UcmdbAbfTableHandler.updateAbfrage(selected);
}
PrimeFaces.current().ajax().addCallbackParam("saved", 1);
//        PrimeFaces.current().ajax().update(":ucmdbform:dt-queries");
//        PrimeFaces.current().executeScript("PF('manageQueriesDialog').hide();");
}