Question

我有以下Extjs3 ArrayStore。在其他地方，我正在侦听一个值，并在页面的其他位置（商店下面的代码）中重新加载具有新数据的商店。我正在寻找一种方法来“重置”或重新启动存储到加载后的原始数据......下次通过监听器时

商店：

  var applicationVersionStoreOriginalData = [
            <c:set var="firstLoop" value="true"/>
            <c:forEach var="productline" items="${environmentLookup.productlines}">
            <c:forEach var="application" items="${productline.applications}">
            <c:if test="${!firstLoop}">,
            </c:if>
            <c:set var="firstLoop" value="false"/>
            ["<c:out value="${application.recid}"/>","<%=ValueC.PRODUCT_NOT_LISTED%>","<%=ValueC.PRODUCT_NOT_LISTED%>"]
            <c:forEach var="applicationversion" items="${application.applicationversions}">,
            ["<c:out value="${application.recid}"/>","<spring:message text="${applicationversion.applicationversion}" javaScriptEscape="true"/>","<c:out value="${applicationversion.recid}"/>"]
            </c:forEach>
            </c:forEach>
            </c:forEach>
        ];

    var applicationversionStore = new Ext.data.ArrayStore({
        fields: ['applicationId', {name: 'applicationversionName', type: 'string'}, 'applicationversionId'],
        data: applicationVersionStoreOriginalData,
        originalData: applicationVersionStoreOriginalData
    });

数据加载：

function filterApplicationVersionStore(appRecId) {
        console.log('AppRecId =' + appRecId);
        var store = Ext.getCmp("applicationversionCombo").getStore();
        var unlistedData = [[appRecId,"-- My version is not listed here --","-- My version is not listed here --"]];
        var applicationVersionStoreOriginalData = Ext.getCmp('applicationVersionStoreOriginalData')
        var applicationVersionCombo = Ext.getCmp('applicationversionCombo');

        if (!store.originalData) {
        store.originalData = store.getRange();
        }

        if (appRecId == '0309CD56B8CF4245A49E8C201C59AD36') {
            console.log('loading new data');
            store.loadData(unlistedData, false);
            store.reload();
        }
        else {
            console.log('loading old data');
            if (store.originalData) {
            store.loadData(store.originalData, false);
            }
        }
    }

我现在希望能够使用原始数据重新加载商店;这可能吗？

很多人感谢！

我在ExtJs3.4

这是我在控制台中看到的......

passing appRecId to function = AAEBD771130144A3A207F8BDF10B910F 
AppRecId =AAEBD771130144A3A207F8BDF10B910F 
loading old data 

---WORKS (if i disable //store.loadData(store.originalData, false);) -- otherwise the store has dupes and seems to contain mulitples

passing appRecId to function = 0309CD56B8CF4245A49E8C201C59AD36 
AppRecId =0309CD56B8CF4245A49E8C201C59AD36 
loading new data 

--NEW 'EMPTY' DATA IS THERE

passing appRecId to function = 987C7D2D6D194E5196F7598DDC624480 
AppRecId =987C7D2D6D194E5196F7598DDC624480 
loading old data 

--EMPTY!

Answer 1

商店不支持立即恢复已更换的数据......但您可以自行轻松实现。

以下是使用您的代码完成的方法：

if (some condition) {
    // save original data before losing it
    if (!store.originalData) {
        store.originalData = store.getRange();
    }

    var data = [
        [appRecId,"-- My version is not listed here --","-- My version is not listed here --"]
    ];
    store.loadData(data, false);
    store.reload();
} else {
    // restore original data
    if (store.originalData) {
        store.loadData(store.originalData);
    }
    // else, that's probably still original data
}

修改

如何确保originalData始终存在：

var data = [ <c:set var="firstLoop" value="true"/> <c:forEach var="productline" items="${environmentLookup.productlines}"> <c:forEach var="application" items="${productline.applications}"> <c:if test="${!firstLoop}">,</c:if> <c:set var="firstLoop" value="false"/> ["<c:out value="${application.recid}"/>","<%=ValueC.PRODUCT_NOT_LISTED%>","<%=ValueC.PRODUCT_NOT_LISTED%>"] <c:forEach var="applicationversion" items="${application.applicationversions}">, ["<c:out value="${application.recid}"/>","<spring:message text="${applicationversion.applicationversion}" javaScriptEscape="true"/>","<c:out value="${applicationversion.recid}"/>"] </c:forEach> </c:forEach> </c:forEach> ]; var applicationversionStore = new Ext.data.ArrayStore({ fields: ['applicationId', {name: 'applicationversionName', type: 'string'}, 'applicationversionId'], data: data, originalData: data });

ExtJs ArrayStore（重新加载还是重新启动？）有可能吗？

1 个答案: