Re: Displaying nested outputs by name

Hi Shash,

Thanks again. The jstl does indeed work :-).

Max

> Max,
>
> The "nested" property is a List, not a Map, so it's contents cannot be 
> retrieved by name (key), just iterated upon.
>
> What you can do though, is instead off adding the name,  phone, etc. 
> as Outputs, add them as attributes of the row:
>
>    Output table = res.createOutput("table");
>    res.add(table);
>    for (int rows = 0; rows < 10; rows++) {
>       Output row = res.createOutput("row" + rows);
>       table.add(row);
>       row.setAttribute( "name", "name" + rows );
>       row. setAttribute ( "addr", "addr" + rows );
>       row. setAttribute ( "tel", "tel" + rows );
>    }
>
> and in the JSP:
>
> <table>
>  <c:forEach var="row" items="${table.map['nested']}">
>     <tr>
>          <td> <c:out value="${row.map['attributes'].map['name '] . 
> map[' content '] }" default=""/> </d>
>          <td> <c:out value="${row. map['attributes'] . map['tel '] . 
> map[' content '] }" default=""/> </td>
>          <td> <c:out value="${row. map['attributes'] . map['addr '] . 
> map[' content '] }" default=""/> </td>
>      </tr>
>  </c:forEach>
> </table>
>
> Disclaimer: I haven't actually tried the JSTL, in theory this should 
> work :-).  The "map" is a result of using DynaBeans instead of regular 
> JavaBeans.  Basically, we have the "row" output, which has a 
> "attributes" property, which has a "name" property, which has a 
> "content" property.
>
> HTH,
> Shash
>
> Max wrote:
>
>> I'm having a real hard time understanding how to display nested 
>> elements in Keel. I'm beginning to think that I have misunderstood 
>> something horribly as this should be pretty standard stuff. I 
>> remember doing this quite often using Expresso and having no problems 
>> in referencing the nested outputs by name.
>>
>> I need to display a table of items. My model code looks something like:
>>
>>    Output table = res.createOutput("table");
>>    res.add(table);
>>    for (int rows = 0; rows < 10; rows++) {
>>       Output row = res.createOutput("row" + rows);
>>       table.add(row);
>>       Output name = res.createOutput("name", "name" + rows);
>>       row.add(name);
>>       Output addr = res.createOutput("addr", "addr" + rows);
>>       row.add(addr);
>>       Output tel = res.createOutput("tel", "tel" + rows);
>>       row.add(tel);
>>    }
>>
>> I can display this in a jsp page by using:
>>
>>  <c:forEach var="row" items="${table.map['nested']}">
>>        <p><c:out value="${row.map['name']}" default=""/> = <c:out 
>> value="${row.map['content']}" default=""/> </p>
>>        <c:forEach var="output" items="${row.map['nested']}">
>>            <p><c:out value="${output.map['name']}" default=""/> = 
>> <c:out value="${output.map['content']}" default=""/> </p>
>>        </c:forEach>
>>  </c:forEach>
>>
>> However this simply iterates over all outputs. In my view I wish to 
>> explicitly reference an output, so I would like something like:
>>
>> <table>
>>  <c:forEach var="row" items="${table.map['nested']}">
>>      <tr>
>>          <td> {display name} </d>
>>          <td> {display tel} </td>
>>         <td> {display addr} </td>
>>      </tr>
>>  </c:forEach>
>> </table>
>>
>> Note that I am changing the order of the outputs here.
>>
>> One solution that will likely work but is so clumsy as to be 
>> unreasonable is to iterate over all the outputs and test each one in 
>> a <c:if> statement to see if it is the output I am looking for. This 
>> solution gets even worse if I have mixed inputs/outputs/commands and 
>> now also need to test the type.
>>
>> I have tried all sorts of ways to try to reference these nested 
>> outputs by name but can't seem to find a way. I have also tried to 
>> write a struts tag based solution without success. I have also tried 
>> nesting the outputs as attributes using row.setAttribute(...) without 
>> success.
>>
>> Is there a way to do this or have I got the wrong end of the stick 
>> and should be approaching this problem differently?
>>
>> Thanks for any assistance.
>> Max
>> http://keelframework.org/documentation.shtml
>> Keelgroup mailing list
>> [email protected] 
>> <mailto:[email protected]>
>> http://lists.keelframework.com/listinfo.cgi/keelgroup-keelframework.com
>
>

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