Rendered attribute and Expression Language

[Marcin Kwiatkowski]

Hi!
I've something like this:

<h:dataTable value="#{SomeBean.someList}" var="List">
<h:column>
<h:outputText value="some text" rendered="..."></h:outputText>
</h:column>
</h:dataTable>

I need to compare two values one from 'List' and one from 'SomeBean'. I tried something like this: rendered="#{List.value} < #{SomeBean.value}", but it didn't work. Is there any way to compare these two values by EL?

[A. Dusi]

  "#{List.value} < #{SomeBean.value}"  

This should be

  "#{List.value < SomeBean.value}"  

[gul kaur]

you can't use < for comparing two values use le(less than equal)"#{value1 le value2}"

[Tim Holloway]

Actually, I think you can, but you have to use the entity version of the less-than operator so that the XML parser doesn't mistake it for part of an element definition.

In other words, not:

rendered="#{a < b}"

but:

rendered="#{a &lt; b}"

But having said that, I really don't recommend doing any sort of logic on the web page itself unless it's unavoidable. I normally use a boolean property in the backing bean or a formatter in the backing bean.