Question

我希望在表单验证后保留选定的值。我的代码在这里：

    <h:form id="advanceSearchForm">
    <p:dataGrid value="#{advancedSearchBean.selectedCriteriasList}" id="advancedSearchGrid" var="criteria" rowIndexVar="rowIndex"
        columns="2" layout="grid" paginator="false" >
        <h:panelGrid columns="1" id="criteriaPanel">
            <p:panel id="criteria">
                <div>

                    <!-- select criteria -->
                    <p:selectOneMenu value="#{criteria}" label="#{criteria.name}" 
                            valueChangeListener="#{advancedSearchBean.addNewCriteria}"
                            converter="#{advancedSearchBean.criteriaConverter}">
                                <f:selectItems value="#{advancedSearchBean.criterias}"
                                    var="crt"
                                    itemLabel="#{crt.name}"
                                    itemValue="#{crt}"
                                    itemDisabled="#{advancedSearchBean.disableItem(crt.id)}" />
                                <f:ajax execute="@this"/>
                    </p:selectOneMenu>

                    <!-- launch date -->
                    <p:outputPanel rendered="#{criteria.id != null and (criteria.id == BusinessConstants.ADVANCED_SEARCH_FILTER_LAUNCH_DATE_ID)}">
                            <p:outputPanel>
                                <h:outputText value="From" styleClass="passportLabel" />
                                <p:inputMask required="true" id="launchStartDate" value="#{advancedSearchBean.launchStartDate}" mask="99/9999">
                                    <f:convertDateTime pattern="MM/yyyy" timeZone="#{sessionScope.identity.timezone}" />
                                    <p:ajax event="change" listener="#{advancedSearchBean.changeLaunchStartDate()}" />
                                </p:inputMask>
                            </p:outputPanel>
                            <p:outputPanel>
                                <h:outputText value="To" styleClass="passportLabel" />
                                <p:inputMask required="true" id="launchEndDate" value="#{advancedSearchBean.launchEndDate}" mask="99/9999">
                                    <f:convertDateTime pattern="MM/yyyy" timeZone="#{sessionScope.identity.timezone}" />
                                    <p:ajax event="change" listener="#{advancedSearchBean.changeLaunchEndDate()}" />
                                </p:inputMask>
                            </p:outputPanel>
                    </p:outputPanel>


                </div>
            </p:panel>
        </h:panelGrid>
    </p:dataGrid>

    <!--  run search button -->
    <div>
        <p:commandButton id="runAdvancedSearch" value="Run search" action="#{advancedSearchBean.doAdvancedSearch}"
             update="advanceSearchForm:advancedSearchGrid"/>
    </div>
    </h:form>

当我输入错误的日期并点击“搜索”按钮时，我收到了验证错误消息，而且我也在selectOneMenu中丢失了所选的值。

奇怪的是，如果重定向到另一个页面，之后我又回来了，它可以...我的豆子是：

@ManagedBean(name = "advancedSearchBean")
@ViewScoped
public class AdvancedSearchBean {

private Map<Long, String> criteriaMap;
private List<AutocompleteCriteria> criterias;
private List<AutocompleteCriteria> selectedCriteriasList;

@PostConstruct
public void init() {
    criteriaMap = BusinessConstants.ADVANCED_SEARCH_CRITERIA.entrySet().stream().sorted(Entry.comparingByValue()).
            collect(Collectors.toMap(Entry::getKey, Entry::getValue, (e1, e2) -> e1, LinkedHashMap::new));
    criterias = new ArrayList<AutocompleteCriteria>();
    for(Iterator<Map.Entry<Long, String>>it = criteriaMap.entrySet().iterator();it.hasNext();){
         Map.Entry<Long, String> entry = it.next();
         criterias.add(new AutocompleteCriteria(entry.getKey(), entry.getValue()));
    }
    criteriaConverter = new AutocompleteConverter(criterias);
    selectedCriteriasList = new ArrayList<AutocompleteCriteria>();
    selectedCriteriasList.add(new AutocompleteCriteria(BusinessConstants.ADVANCED_SEARCH_FILTER_NO_CRITERIA, criteriaMap.get(BusinessConstants.ADVANCED_SEARCH_FILTER_NO_CRITERIA)));
}

Answer 1

在p:selectOneMenu value="#{criteria}"而不是value="#{advancedSearchBean.criteria}"。

p：selectOneMenu在表单验证后没有保留值

1 个答案: