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PODynamic dataTable form deletes its array when ajax is used
 

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  1. PODynamic dataTable form deletes its array when ajax is used
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    <p>I have a dynamic dataTable that adds and removes objects. This works fine when I don't use ajax. However, when I use ajax, a problem occurs. Adding values initially is fine. However, when I start deleting objects, when I delete the last object, the items list gets deleted as well and becomes null. I am using jsf 2.2 with primefaces. I'm not sure what's causing this problem. My code is as follows.</p> <p>item.xhtml </p> <pre class="lang-html prettyprint-override"><code>&lt;h:panelGroup id="list"&gt; &lt;h:dataTable value="#{item.items}" var="object"&gt; &lt;h:column&gt; &lt;!-- Figure out what these facets are or delete them --&gt; &lt;f:facet name="keys"&gt;Keys&lt;/f:facet&gt; &lt;p:inputText value="#{object.x}" /&gt; &lt;/h:column&gt; &lt;h:column headerText="Values"&gt; &lt;f:facet name="values"&gt;Values&lt;/f:facet&gt; &lt;p:inputText value="#{object.y}" /&gt; &lt;/h:column&gt; &lt;h:column&gt; &lt;h:commandLink value="Delete" action="#{user.removeObject(object)}"&gt; &lt;f:ajax execute="@form" render="@form" /&gt; &lt;/h:commandLink&gt; &lt;/h:column&gt; &lt;/h:dataTable&gt; &lt;h:commandButton value="add" action="#{user.addObject}"&gt; &lt;f:ajax execute="@form" render="@form" /&gt; &lt;/h:commandButton&gt; &lt;/h:panelGroup&gt; </code></pre> <p>item.java</p> <pre><code>@ManagedBean @ViewScoped public class Item implements Serializable{ public void addObject(){ Pair&lt;String,String&gt; tempPair = new Pair&lt;String,String&gt;("",""); items.add(tempPair); return; } public void removeObject(Pair&lt;String,String&gt; i){ items.remove(i); return; } } </code></pre> <p><strong>UPDATE 1</strong></p> <p>I tried using jsf 2.1 instead, changing my viewAction to preRenderView, and my code works fine.</p>
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    1. CODid you try limiting the components rendered by your ajax call? You _shouldn't need_ to rerender the entire parent `<h:form>` just to remove a row from a table.
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      1. PODynamic dataTable form deletes its array when ajax is used
      1. USGamb
    2. COI've tried changing the `f:ajax` to `<f:ajax render="dataTableId">`, but although the add works, the delete doesn't.
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    3. COWhat's the scope of the managed bean? Can you show your full managed bean code?
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      1. USLuiggi Mendoza
 

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