Question

我有一个空白的表面lazydatamodel表。调用lazydatamodel的load方法并正确执行查询。如果我对来自load方法的返回数据设置了制动点，则它包含预期的数据。但是在xhtml中仍然有一个空表。

lazydatamodel类：

@Named
@Stateless
public class LazyEventDataModel extends LazyDataModel<Event> implements Serializable {

private static final long serialVersionUID = -1044044395695736241L;

@Inject @YpayDB EntityManager em;

@Override
public  List<Event> load(int first, int pageSize, String sortField, SortOrder sortOrder, Map<String,String> filters) {

    if(sortField == null || sortField.equals("")){
        sortField = "event.startUTC";
    }

    List<Event> data = selectData(first, pageSize, sortField, DataUtilsWeb.transformSortOrder(sortOrder), filters);
    //row count
    this.setRowCount(count(filters));

    return data;
}
.....

调用lazydatamodel的bean：

@Named
@ViewScoped
public class ModeratorDashboardBean implements Serializable {

private static final long serialVersionUID = -8586184444671684610L;

@Inject
private LazyEventDataModel lazyEventDatamodel;

public LazyEventDataModel getLazyEventDatamodel() {
    return lazyEventDatamodel;
}

}

xhtml数据表文件：

<p:dataTable emptyMessage="No data" id="dataTable" var="event" value="#{moderatorDashboardBean.lazyEventDatamodel}"
                     paginatorTemplate="{CurrentPageReport}  {FirstPageLink} {PreviousPageLink} {PageLinks} {NextPageLink} {LastPageLink} {RowsPerPageDropdown}"
                     paginator="true"  paginatorPosition="bottom" rowsPerPageTemplate="10,20,30" rows="20" rowKey="#{event.idEvent}"   
                     lazy="true" style="width:100%"  sortBy="event.startUTC" sortOrder="DESCENDING" filterDelay="400">

                    <p:column headerText="Date from" >
                         <h:outputText value="#{event.start}" >
                                <f:convertDateTime pattern="dd.MM.yy HH:mm" />  
                            </h:outputText>
                    </p:column>
                    <p:column headerText="Date to" >
                         <h:outputText value="#{event.end}" >
                                <f:convertDateTime pattern="dd.MM.yy HH:mm" />  
                            </h:outputText>
                    </p:column>
                     <p:column headerText="Event" filterBy="#{event.name}" filterMatchMode="contains" sortBy="event.name">
                         <h:outputText value="#{event.name}" >
                            </h:outputText>
                    </p:column>


                </p:dataTable>

Answer 1

我也猜测

this.setRowCount(count(filters));

错了。假设是正确的：

this.setRowCount(data.size());

Answer 2

如果您删除了h：outputText（本来会想到的），它将起作用

<p:column headerText="Event" filterBy="#{event.name}" filterMatchMode="contains" sortBy="event.name">
    #{event.name}"
</p:column>

primefaces lazydatamodel表是空的

2 个答案: