My Layout component has a message parameter of type Block that gets displayed if set. Pages that
should display messages derive from a base class with a message page property of type string. In the
page's template I then bind Layout's message parameter to the page's message property (coercion from
String to Block is done automatically by Tapestry). In an event handler I then acquire a page
instance by injecting it, set the message and return that page.
HTH,
Uli
On 13.08.2009 09:19 schrieb dirk.latterm...@bgs-ag.de:
Hi list,
while trying to grasp the "tapestry way of doing things", I stumbled on
this question:
I want to show a message in response to a submit. It is not a result of
validation, but rather of the database state which is detected during
data manipulation in the onSuccess event. For example, the submit is
supposed to delete several entries in a database, some of which may have
been removed by another process between the user selecting them and
submitting the form. If this is the case, I want to show a friendly
message to inform the user about this fact.
Normally, after a submit, the same page should be re-displayed with
updated data. I'm not sure how to incorporate the messages there.
Can I use something similar to the <t:errors/> component for this? That
one uses a wording adapted to the input validation and uses error colors
which don't fit here.
Maybe I need to implement some similar behaviour by hand via properties
into which the messages are put and display these "by hand" in the tml
template?
Another way would be to use an "exception page". Can I use a special
exception page that gets called automatically for some special type of
exceptions?
A normal page especially for user messages could be used, too, but what is
preferred way?
Is there a way that tapestry suggests for this situation, as it does for
input validation?
Thank you,
Dirk
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Software Systemplanung AG
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