我有一个带有惰性数据模型和分页的数据表。我想在单击“搜索”按钮时禁用默认排序,并在单击“显示”按钮时再次启用它。所以没有将“sortBy”放在我的 xhtml 文件中,而是在我的支持 bean 中动态设置它。
一切正常,直到我单击标题以在降序和升序之间翻转排序顺序。这意味着如果我不点击标题,“搜索”按钮会禁用排序,“显示”按钮会正确启用它。但是当我单击标题然后单击“搜索”按钮时,在load
LazyDataModel 的功能中,参数的值sortField
是"date"
并且数据表将按日期排序,尽管“日期”列显然没有着色!
这是我的数据表:
<h:form id="contents-form">
...
<p:dataTable id="tbl" widgetVar="tbl" var="msg" value="#{homeController.messagesModel}" lazy="true"
currentPageReportTemplate="سطر {startRecord}-{endRecord} از {totalRecords}"
paginatorTemplate="{CurrentPageReport} {FirstPageLink} {PreviousPageLink} {PageLinks} {NextPageLink} {LastPageLink} {RowsPerPageDropdown}"
paginator="true" rows="10" rowsPerPageTemplate="5,10,15"
emptyMessage="هیچ پیامکی وجود ندارد."
selection="#{homeController.selectedMessages}" rowSelectMode="checkbox"
rowKey="#{msg.id}" filteredValue="#{homeController.filteredMessage}"
editable="true" editMode="cell"
style="width:100%" dir="rtl">
<f:facet name="header">
<p:commandButton value="خروجی" action="#{homeController.prepareExport}" icon="fa fa-save"
update="export-dlg-box" oncomplete="PF('exportDlgBox').show()"/>
<p:commandButton value="واژگان" action="#{homeController.showListTermsChart}"
icon="fa fa-bar-chart" update="contents-form chart-form msgs"
oncomplete="PF('chartDlgBox').show()"/>
</f:facet>
<p:ajax event="cellEdit" listener="#{homeController.onCellEdit}" oncomplete="updateDescFilter()"/>
<p:column selectionMode="multiple" style="width:16px;text-align:center"/>
<p:column headerText="فرستنده" style="width:100px" filterBy="#{msg.sender.number}"
sortBy="#{msg.sender.number}">
<p:commandLink action="#{homeController.setPhoneNumToShow(msg.sender)}" update="phone-form"
oncomplete="PF('phoneDlgBox').show()" styleClass="simple-command-link">
<h:outputText value="#{msg.sender.number}"/>
</p:commandLink>
</p:column>
<p:column headerText="گیرنده" style="width:100px" filterBy="#{msg.receiver.number}"
sortBy="#{msg.receiver.number}">
<p:commandLink action="#{homeController.setPhoneNumToShow(msg.receiver)}" update="phone-form"
oncomplete="PF('phoneDlgBox').show()" styleClass="simple-command-link">
<h:outputText value="#{msg.receiver.number}"/>
</p:commandLink>
</p:column>
<p:column headerText="متن" sortBy="#{msg.text}">
<h:outputText value="#{msg.getTrimmedText()}"/>
</p:column>
<p:column headerText="زمان" style="width:100px" filterBy="#{msg.date}" sortBy="#{msg.date}">
<f:facet name="filter">
<p:calendar pattern="yyyy-MM-dd">
<p:ajax event="dateSelect" oncomplete="PF('tbl').filter()" update="tbl"/>
</p:calendar>
</f:facet>
<h:outputText value="#{msg.getJalaliDate()}"/>
</p:column>
<p:column headerText="منبع" style="width:70px" filterBy="#{msg.source}" sortBy="#{msg.source}">
<f:facet name="filter">
<p:selectOneMenu onchange="PF('tbl').filter()" style="width:30px; direction:ltr">
<f:selectItem itemLabel="همه" itemValue="#{null}" noSelectionOption="true"/>
<f:selectItems value="#{homeController.sources}" var="source"
itemValue="#{source}" itemLabel="#{source}"/>
</p:selectOneMenu>
</f:facet>
<h:outputText value="#{msg.source}"/>
</p:column>
<p:column headerText="توضیح" style="width:70px" filterBy="#{msg.description}"
sortBy="#{msg.description}">
<f:facet name="filter">
<p:selectOneMenu id="desc-filter-select" onchange="PF('tbl').filter()"
style="width:30px; direction:ltr">
<f:selectItem itemLabel="همه" itemValue="#{null}" noSelectionOption="true"/>
<f:selectItems value="#{homeController.descriptions}" var="desc"
itemValue="#{desc}" itemLabel="#{desc}"/>
</p:selectOneMenu>
</f:facet>
<p:cellEditor>
<f:facet name="output"><h:outputText value="#{msg.description}"/></f:facet>
<f:facet name="input"> <p:inputText id="desc-input" value="#{msg.description}"
style="width:85%"/></f:facet>
</p:cellEditor>
</p:column>
<p:column headerText="جزئیات" style="width:40px">
<p:commandLink action="#{homeController.setMessageToShow(msg)}" ajax="true"
update="img-dlg-box" oncomplete="PF('imgDlgBox').show()">
<i class="fa fa-blue fa-desktop"/>
</p:commandLink>
</p:column>
<p:column headerText="مشاهده گفتگو" style="width:40px">
<p:commandLink action="#{homeController.showConversation(msg.sender, msg.receiver)}"
ajax="true" update="conv-dlg-box" oncomplete="PF('convDlgBox').show()">
<i class="fa fa-blue fa-wechat"/>
</p:commandLink>
</p:column>
</p:dataTable>
</h:form>
我的“搜索”按钮:
<p:commandButton value="جستوجو" action="#{homeController.search}" update=":contents-form:tbl msgs"
icon="fa fa-search"/>
我的“显示”按钮:
<p:commandButton value="نمایش" icon="fa fa-desktop" action="#{homeController.loadArchive}"
update="contents-form msgs"/>
search
支持bean中的方法:
public void search() {
if (this.selectedArchive == null) {
FacesContext.getCurrentInstance().addMessage(null,
new FacesMessage(FacesMessage.SEVERITY_ERROR, "خطا!", "لطفا یک مجموعه را انتخاب کنید"));
return;
}
if ((this.textQuery != null && !this.textQuery.equals(""))
|| (this.selectedNodes != null && this.selectedNodes.length > 0)) {
logger.info(String.format("searching '%s' in archive %d ...", this.textQuery, this.selectedArchive.getId()));
List<String> selectedWords = this.getSelectedWords(this.selectedNodes);
searchText(this.textQuery, selectedWords);
} else {
FacesContext.getCurrentInstance().addMessage(null,
new FacesMessage(FacesMessage.SEVERITY_ERROR, "خطا!", "برای جستوجو هیچ متنی وارد نشده و هیچ واژهای انتخاب نشده است."));
return;
}
extractChoices();
// Disable default sorting:
DataTable table = (DataTable) FacesContext.getCurrentInstance().getViewRoot().findComponent(":contents-form:tbl");
table.setValueExpression("sortBy", null);
table.setValueExpression("sortOrder", null);
}
和loadArchive
支持bean中的方法:
public void loadArchive() {
if (this.selectedArchive == null) {
FacesContext.getCurrentInstance().addMessage(null,
new FacesMessage(FacesMessage.SEVERITY_ERROR, "خطا!", "لطفا یک مجموعه را انتخاب کنید"));
return;
}
this.messagesModel = new LazyMessageModel(this.selectedArchive, true, this.messageService);
extractChoices();
// Enable default sorting:
FacesContext context = FacesContext.getCurrentInstance();
ExpressionFactory ef = context.getApplication().getExpressionFactory();
DataTable table = (DataTable) context.getViewRoot().findComponent(":contents-form:tbl");
ValueExpression sortVe = ef.createValueExpression(context.getELContext(), "#{msg.date}", Message.class);
table.setValueExpression("sortBy", sortVe);
table.setSortOrder("descending");
logger.info(String.format("archive %d loaded", (this.selectedArchive.getId())));
}
规格:
- Primefaces 6.2
- JSF 2.2.14
- Java 1.8