On Mon, 24 Jun 2002, David Goodenough wrote:
> <c:set var="group" value="${param.group}">
> <select name="group">
> <option>Default value</option>
> <c:forEach var="g" items="${groups.rows}">
> <option <c:if test="${group == g.group}">selected</c:if>>
> <c:out value="g.group"/>
> </option>
> </forEach>
> </select>
>
> where there is a field called group in each row of the DB. Doing such
> comparisons in the old code with group.equals( newGroup) checks
> returning selected when true used to work nicely.
>
> But even when the value of the variable group is equal to the value of
> g.group the text does not emit selected into the option.
I think we'll need a bit more information to help, because the comparison
you have *should* work. Try
<c:out value="group = '${group}'; g.group = '${g.group}'"/>
before the <c:if> tag to see what the values currently are, for each round
of the iteration.
Note also that <c:out value="g.group"/> will output the text "g.group"
literally; I think you probably mean <c:out value="${g.group}"/>.
Anyway, please let us know if you need more help.
> As a side question what is the recommended sequence of tags to load up
> the previous form value of a field into a variable. I seem to have lots
> of code of the form:-
>
> <c:set var="group" value="${param.group}">
> <c:if test="${empty group}">
> <c:set var"group" value="some default value" />
> </c:if>
>
> at the top of my code. There must be a better way.
The <c:out> tag, which I assume you'll be using to output the final value
of 'group' here, supports a 'default' attribute that takes care of this
case. Thus, you could write
<c:out value="${param.group}" default="some default value"/>
Hope that helps,
--
Shawn Bayern
"JSTL in Action" http://www.jstlbook.com
(coming in July 2002 from Manning Publications)
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