c:forEach in rich:column

[glammy]

Hi,

I'm using MyFaces implementation of JSF 1.2, together with RichFaces components, and inside a <rich:dataTable>'s <rich:column> I want to iterate over a Set, which is a property of the variable of the dataTable. Something like

{code}<rich:dataTable var="myVar" ...>
<rich:column>
<c:forEach var="innerVar" values="${myVar.mySet}"
${innerVar}
</c:forEach>
</rich:column
</rich:dataTable>{code}

But it doesn't work. myVar seems to be empty for c:forEach. The odd thing is that if I place the following code inside the <rich:column>
{code}<c:if test="${empty myVar">
${myVar.class.name}
</c:if>{code}

the name of the class is outputted. I also tried # isntead of $, with no success.

I tried iterating over a list in a declared backing bean, and it worked fine. So the question would go like this - how do I make this variable accessible for jstl tags' expressions.

[nbelaevski]

Hello,

It is not allowed to base compile-time iteration tags (c:forEach) on variables defined by render-time iteration components (rich:dataTable). Use a4j:repeat instead of c:forEach.

[glammy]

Unfortunately no tag (neighter a4j:repeat, nor ui:repeat) work with Sets.
There is a work-around using custom EL resolver, but this is pretty ugly IMO

[andrei_exadel]

Move the set of columns you want to use to bean that u use for table's value attribute.

Columns count should be defined for all table. You have no reason to get columns set from the table's var variable.

Correct code should be like as:

<rich:dataTable value="#{bean.rows}" var="row">
<c:forEach items="#{bean.columns}" var="col">
......

[glammy]

Each row object has a Set as a property. That is - the table displays a collection of hibernate pojos, each of which has some items in a set to be displayed.

Here is a neat workaround I deviced - http://bozhobg.wordpress.com/2009/03/03/how-to-iterate-over-javautilset-in-jsf/