錯誤選擇的dataTable

Question

當我做出選擇DataTable中後，它給下面

[javax.faces.FacesException: DataModel must implement org.primefaces.model.SelectableDataModel when selection is enabled or you need to define rowKey attribute]] 

但在我的dataTable rowKey屬性已經定義錯誤，我檢查了它的價值是獨一無二的。可能是什麼原因可能我收到此錯誤

DataTable的代碼如下

<p:dataTable id="scenarioDataTableId" var="scenarioDataTable" value="#{myBean.scenarioApplicationColumnBOList}" tableStyle="width:90%" rowKey="scenarioDataTable.scenarioApplicationColumnId" selection="#{myBean.selectedScenarioApplicationColumnRow}" > 
    <f:facet name="header">Database Columns That will be updated in this Scenario</f:facet> 

    <p:ajax event="rowSelectRadio" listener="#{myBean.editSelectedScenarioApplicationColumnAction}"></p:ajax> 
    <p:column selectionMode="single" style="width:10%" /> 

    <p:column id="Id" headerText="Id" > 
          #{scenarioDataTable.scenarioApplicationColumnId} 
    </p:column> 

    <p:column id="scenarioId" headerText="Scenario Id" > 
          #{scenarioDataTable.scenarioId} 
    </p:column> 

    <p:column id="appId" headerText="Application Column Id" > 
          #{scenarioDataTable.applicationColumnId} 
    </p:column> 

    <p:column id="tableNameId" headerText="Table Name" > 
          #{scenarioDataTable.tableName} 
    </p:column> 

    <p:column id="columnNameId" headerText="Column Name" > 
          #{scenarioDataTable.columnName} 
    </p:column> 

    <p:column id="columnValidValueId" headerText="Column Valid Value" > 
          #{scenarioDataTable.columnValidValue} 
    </p:column> 

    <p:column id="dbActionId" headerText="DB Action" > 
          #{scenarioDataTable.dbAction} 
    </p:column> 

    <f:facet name="footer"> 
     <p:commandButton value="Add New Row" action="#{myBean.openDialogScenarioUpdateColumn}" oncomplete="dialogScenarioUpdateColumn.show()" rendered="#{myBean.scenarioInputFieldRendered}"></p:commandButton>  
     <p:spacer width="20" ></p:spacer> 
     <p:commandButton id="editButton" value="Edit" action="#{myBean.editSelectedScenarioApplicationColumnAction}" update=":formSelectCriteria:ScenarioMainPanel" ></p:commandButton> 
     <p:spacer width="20" ></p:spacer> 
     <p:commandButton id="deleteButton" value="Delete"></p:commandButton> 
    </f:facet> 

</p:dataTable> 

Answer 1

看一看的Primefaces Showcase。 A rowKey必須指示p:dataTable（它是您的#{myBean.scenarioApplicationColumnBOList}對象之一的屬性）中顯示的屬性，例如，

rowKey="#{scenarioDataTable.scenarioApplicationColumnId}" 

但不

rowKey="scenarioDataTable.scenarioApplicationColumnId"