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I tried to select rows in a p:dataTable, however it shows an error. After I added a value for the rowKey attribute of p:dataTable, the error rectified. I thus wonder what the actual use of the rowKey attribute is.
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How to do it... To make a single selection possible with a command component, such as commandLink or commandButton , f:setPropertyActionListener can be used to set the selected row as a parameter to the server side. <p:dataTable id="withCommand" var="car" value="#{dataTableController.
Tag dataTable. Description: DataTable is an enhanced version of the standard Datatable that provides built-in solutions to many commons use cases like paging, sorting, selection, lazy loading, filtering and more.
I quote PrimeFaces reference guide:
RowKey should be a unique identifier from your data model and used by datatable to find the selected rows. You can either define this key by using the rowKey attribute or by binding a data model which implements org.primefaces.model.SelectableDataModel.
So if your datatable is set by collection of beans, rowKey should be the attributte which uniquely represents that bean, e.g a property representing a primary key of a database.
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