On 10 juin, 19:05, Christoph Zwerschke <[email protected]> wrote:
> Am 10.06.2010 16:49 schrieb aspineux:
>
> > When displaying the query in a table, I want to display a custom
> > message if the result is empty.
>
> In TG 1.x you could use tg.ipeek for
> that:http://docs.turbogears.org/1.0/stdvars
Yesssssssss !
Thanks
I works ! I cut&pasted the source
def ipeek(it):
"""Lets you look at the first item in an iterator.
This is a good way to verify that the iterator actually contains
something.
This is useful for cases where you will choose not to display a
list or
table if there is no data present.
"""
it = iter(it)
try:
item = it.next()
return itertools.chain([item], it)
except StopIteration:
return None
in my controller :
return dict(...
elements=ipeek(elements),
...)
in my template :
<p py:if="not elements">The list is empty</p>
<table py:if="elements">
<tr><th>Name</th></tr>
<tr py:for="elem in elements"><td>${elem.name}</td></tr>
</table>
Regards
--
Alain Spineux | aspineux gmail com
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>
> Unfortunately, TG 2.x doesn't seem to provide anything similar.
>
> -- Christoph
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