Hello,
Here's the question for the short version (below you'll find some
lengthier explanations ...) :
I'd like to render a list of groups of radio buttons. Said list has a
variable length. So my data structure looks like :
[ [radio1,radio2,radio3], [radio1,radio2,radio3,radio4], ...]
I am currently using Struts 1.2.4. Is there a way of rendering these
groups of radio buttons without upgrading my version of Struts ?
------------
For the detailed explanation :
I'm trying to render a form with fields which aren't defined by advance.
More precisely, I have a List (an ArrayList) of custom objects, which
are described like this :
public class MyField {
private String type, group;
private Object data;
// then the accessors follow ...
}
The "type" attribute contains which kind of field is to be rendered
(radio, text, checkbox, etc.). The "group" attribute enables me to know
which information is answered. For example :
I have two objects that are to be filled by the user, a text field, and
a radio field. So my list of MyField objects will look something like :
[ {"radio", "g1", (ArrayList object)}, {"text", "", (String object)} ]
Now, what I need is to not only render the radio buttons part (which I
eventually managed), but also to get a way to have the submission
succeed ! :-)
Here is a very small example of JSP code :
<html:form action="/indices">
<logic:iterate id="liste" name="indicesForm" property="liste"
indexId="i">
<logic:iterate id="item" name="liste" indexId="j">
<html:radio property="liste[${i}]" value="${item.value}"/>
${item.label}<br/>
</logic:iterate>
</logic:iterate>
<html:submit/>
</html:form>
I voluntarily didn't use indexed properties, since I have to "play" with
inner and outer loops' indexes. Although the form is rendered the right
way, I can't submit info with it, I get an error that says :
"java.lang.NullPointerException: No indexed value for 'liste[2]'"
Since I use a List object, I suppose this isn't very surprising after all.
But then, what's the best way of doing that kind of stuff ?
--
Stéphane Zuckerman
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