Combobox部分刷新问题

Question

经过一段时间的停机后，我又回来做了一些xpages，而且我似乎已经对许多事情做了准备。我有以下代码：

数据源：

<xe:objectData var="league" ignoreRequestParams="true" scope="request">
    <xe:this.saveObject><![CDATA[#{javascript:leagueService.set(league)}]]></xe:this.saveObject>
    <xe:this.createObject><![CDATA[#{javascript:return leagueService.get(viewScope.currentKey);}]]></xe:this.createObject>
</xe:objectData>

和几个组合框

    <xp:comboBox id="idLeagueList" value="#{viewScope.currentKey}">
        <xp:selectItems>
            <xp:this.value><![CDATA[#{javascript: return eu.jeroensomhorst.cms.util.JSFUtil.asSelectItem(leagueService.getAll(season),true);}]]></xp:this.value>
        </xp:selectItems>   
        <xp:eventHandler event="onchange" submit="true" refreshMode="complete"></xp:eventHandler>
    </xp:comboBox>

    <xp:listBox id="lstAvailableTeams">
        <xp:selectItems>
            <xp:this.value><![CDATA[#{javascript:eu.jeroensomhorst.cms.util.JSFUtil.asSelectItem(teamService.getAll());}]]></xp:this.value>
        </xp:selectItems>
    </xp:listBox>

和一个按钮，用于将lstAvailableTeams中的选定团队添加到选定的leage对象

    <xp:button value="&#62;" id="addTeam" >
                <xp:eventHandler event="onclick" submit="true" refreshMode="complete" disableValidators="true">
                    <xp:this.action>
                        <xp:actionGroup>
                            <xp:executeScript>
                                <xp:this.script><![CDATA[#{javascript:var teamList = getComponent("lstAvailableTeams");
    var strTeamKey = teamList.getValue();
    eu.jeroensomhorst.cms.util.LeagueUtil.addTeam(league.getKey(),strTeamKey);}]]></xp:this.script>
                            </xp:executeScript>
                        </xp:actionGroup>
                    </xp:this.action></xp:eventHandler></xp:button>

    <xp:listBox id="leagueTeams">
            <xp:selectItems>
                <xp:this.value><![CDATA[#{javascript:return eu.jeroensomhorst.cms.util.JSFUtil.asSelectItem(league.getTeams());}]]></xp:this.value>
            </xp:selectItems>
    </xp:listBox>

leagueutil的代码如下：

public static void addTeam(String leagueKey,String key){
    LeagueService lService = (LeagueService) DominoUtil.getVariableValue("leagueService");

    League l = (League) lService.get(leagueKey);
    TeamService service = (TeamService) DominoUtil.getVariableValue("teamService");
    Team t = service.get(key);
    Vector<Team> teams = l.getTeams();
    if(teams == null){
        teams = new Vector();
        teams.add(t);
    }else{
        if(!teams.contains(t)){
            teams.add(t);
        }
    }

    l.setTeams(teams);
    // save into database.. this works.
    lService.set(l);

}

因为你看不到任何想象。但问题是如下。每当我更改idLeagueList组合框值并执行changelistener时（它会更新viewscope）。它总是检索在leagueteams组合框中显示的先前值。这是一个非常基本的问题，但我完全没有选择..

Answer 1

createObject的{​​{1}}过早执行：在恢复视图阶段完成之前。这种方式objectData从objectData获取旧值。

viewScope.currentKey

解决问题的一种可能方法是使用联盟对象的视图范围变量。您可以在createObject: viewScope.currentKey = old value afterRestoreView: viewScope.currentKey = old value beforeRenderResponse: viewScope.currentKey = new value 和beforePageLoad个事件中进行设置。

beforeRenderResponse

并在listBox中使用它

viewScope.league = leagueService.get(viewScope.currentKey)

和按钮代码

... eu.jeroensomhorst.cms.util.JSFUtil.asSelectItem(viewScope.league.getTeams())

以下是用于测试目的的代码的简短版本。它使用print语句在几个JSF阶段显示... eu.jeroensomhorst.cms.util.LeagueUtil.addTeam(viewScope.league.getKey(),strTeamKey) 的当前值：

viewScope.currentKey