[stringtemplate-interest] formal arg checking

[Nate]

I assume you are proposing this...

$if (errorMessage)$
    $table(emptyMessage=errorMessage)$
$else$
    $table(emptyMessage="The list is empty.")$
$endif$

While this would solve my specific scenario, formal argument checking is 
still flawed. I should be able to use undefined attributes when applying 
a template, like this...

$table(emptyMessage={$errorMessage; null="The list is empty."$})$

When "errorMessage" is not defined, that code currently throws an error 
saying that the attribute "errorMessage" is not a valid formal argument 
for the "table" template.

Also, the workaround to use an IF statement is not very elegant for more 
complex scenarios because it duplicates the template call. Eg...

$if (errorMessage)$
    $table(
       emptyMessage=errorMessage,
       rows={
          Lots of HTML here.
       }
    )$
$else$
    $table(
       emptyMessage="The list is empty.",
       rows={
          Lots of HTML here.
       }
    )$
$endif$

Hope you have fun on your trip!

-Nate


Terence Parr wrote:
> On Apr 26, 2007, at 11:01 AM, Nate wrote:
>
>> In this particular case, the "table" template displays a table of
>> data.
>> If no data is specified, it displays an error message from the
>> controller OR a message ("The list is empty.") from the template. If
>> there is no error, the message comes from the template, not from the
>> controller.
>
> Can't a simple IF fix this in the template?
>
> Ter
> PS i'm leaving now for the airport. gone 4 days...
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