datatable and row var

[derek]

I'm trying to make my datatables row's alternate colors, I have tried the following, but for some reason the 1st 2 rows are always the same color.. maybe this is a bug?

Code: Select all

<p:dataTable dynamic="true" value="#{ListBean.list.contacts}" var="contact" rows="30" paginator="true" rowIndexVar="row" rowStyleClass="#{row % 2 == 0 ? 'tteven' : 'ttodd'}">
...
</p:dataTable>

[derek]

after a little more experimentation, I found this solution

Code: Select all

<p:dataTable dynamic="true" value="#{ListBean.list.contacts}" var="contact" rows="30" paginator="true" rowIndexVar="row" rowStyleClass="#{(row == null || row % 2 != 0) ? 'tteven' : 'ttodd'}">
...
</p:dataTable>

it seems that the 1st row is null?

[sky_java_seb]

Hi,

Indeed I got same problem. It's a bit weird cause if you output something like #{ row mod 2 } in a column it resolves correctly {0,1} for first lines.
I wonder why it fails in a test as precedence is respected but there shall be a hiden trick or bad convertion used in rowIndexVar value generation (primefaces dependent) or in EL resolution (surely JSF based ?).

Maybe a primefaces master could send a quick look in dataTable rowIndexVar code ?

It's good there is a solution but I don't like using such "dirty" code on such supposed simple things,... unless there is a good reason

[gschmidl]

I can confirm this happens in JBoss 6 as well.

[michiel]

what about the rowIndexVar-value if you add:

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<p:column>
    <f:facet name="header">rowIndexVar</f:facet>
    <h:outputText value="#{row}"/>
</p:column>

with attr. rowIndexVar="row"

[derek]

adding in

Code: Select all

<p:column>
    <f:facet name="header">rowIndexVar</f:facet>
    <h:outputText value="#{row}"/>
</p:column>

displays as expected (starts a 0 and counts up)

even doing

Code: Select all

<p:column>
    <f:facet name="header">rowIndexVar</f:facet>
    <h:outputText value="#{row % 2 == 0}"/>
</p:column>

displays true/false/true/false/etc..

edit: thats exactly what sky_java_seb said above

Derek