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PODisplay all rows in tomahawk paginated, sortable datatable
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  1. PODisplay all rows in tomahawk paginated, sortable datatable
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    copied!<p>I'm trying to create a paginated, sortable datatable using <strong>MyFaces</strong>. The sorting works fine; I can click on a column header and it will sort the data based on the column. Also the pagination works fine for the most part. The datatable will split itself appropriately with some number of items per page. In addition, I want the user to be able to change the number of items displayed per page. Again, this seems to be working until I want all of the items displayed on one page.</p> <p>According to this <a href="http://myfaces.apache.org/tomahawk-project/tomahawk/tagdoc/t_dataTable.html" rel="nofollow">reference</a> (also <a href="http://www.developersbook.com/jsf/myfaces/tomahawk-tag-reference/tomahawk-dataTable.php" rel="nofollow">here</a>), if you set the "rows" attribute of <strong>t:datatable</strong> to "0", it will display the remaining rows in the table. However, when I try this, I get an exception that includes this message: </p> <pre><code>javax.faces.FacesException - You need to set a value to the 'rows' attribute of component 'myComponent' </code></pre> <p>I'm trying to set the number of items per page using an attribute in a backing bean. My <strong>t:datatable</strong> looks like this:</p> <pre><code>&lt;t:dataTable id="myComponent" var="cur" value="#{backingBean.list}" sortAscending="#{backingBean.ascending}" sortColumn="#{backingBean.sortColumn}" sortable="true" styleClass="myClass" rowClasses="oddRow,evenRow" rows="#{backingBean.itemsPerPage}" preserveDataModel="false"&gt; &lt;!-- data here --&gt; &lt;/t:datatable&gt; </code></pre> <p>Later, I have a <strong>t:dataScroller</strong> to control the pagination:</p> <pre><code>&lt;t:dataScroller id="pageNavigation" for="myComponent" paginatorActiveColumnStyle="font-weight:bold;" renderFacetsIfSinglePage="false" binding="#{backingBean.scroller}" paginator="true" &gt; &lt;!-- facets here --&gt; &lt;/t:dataScroller&gt; </code></pre> <p>Then, I have a <strong>h:selectOneMenu</strong> to select the number of items per page</p> <pre><code>&lt;h:selectOneMenu id="myScroller" value="#{backingBean.itemsPerPage}" required="true" onchange="this.form.submit();" valueChangeListener="#{backingBean.updateItemsPerPage}"&gt; &lt;f:selectItems value="#{backingBean.itemsPerPageArray}" /&gt; &lt;/h:selectOneMenu&gt; </code></pre> <p>My backing bean looks something like this:</p> <pre><code>public class BackingBean { private boolean ascending; private Long itemsPerPage; private String sortColumn; private ArrayList&lt;SelectItem&gt; itemsPerPageArray; private ArrayList&lt;SomeObject&gt; list; // data for table private HtmlDataScroller scroller; // constructors, getters, setters, and other stuff here public void updateItemsPerPage(ValueChangeEvent valueChangeEvent) { itemsPerPage = (Long) valueChangeEvent.getNewValue(); resetScrollerIndex(); } private void resetScrollerIndex() { if (scroller!=null &amp;&amp; scroller.isPaginator()) scroller.getUIData().setFirst(0); } // called in constructor private void constructItemsPerPageArray() { itemsPerPageArray = new ArrayList&lt;SelectItem&gt;(); itemsPerPageArray.add(new SelectItem(new Long(10), "10")); itemsPerPageArray.add(new SelectItem(new Long(50), "50")); itemsPerPageArray.add(new SelectItem(new Long(100), "100")); itemsPerPageArray.add(new SelectItem(new Long(0), "All")); } } </code></pre> <p>To sum up, when I select the "All" item from the <strong>h:selectOneMenu</strong>, I get the exception mentioned above. Hopefully, I've included an appropriate level of detail. Thanks!</p>
 

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