Jonathan,
Thanks. Good idea.
I ended up using <t:if test="hasData"> to conditionally layout the grid
or output an error message.
Chuck
Jonathan Barker wrote:
Chuck,
Build and pass your own BeanModel rather than relying on auto-creation from
the source.
I hit the same issue.
Jonathan
-----Original Message-----
From: Chuck Kring [mailto:[EMAIL PROTECTED]
Sent: Thursday, January 31, 2008 6:55 PM
To: Tapestry users
Subject: Exception in grid component if source returns an empty list
I have an application that pulls data from a remote database and
presents it in a Grid component.
Sometimes the database is not available and my access method returns an
empty arraylist. This triggers a bad-looking exception in tapestry 5:
org.apache.tapestry.ioc.internal.util.TapestryException
Failure reading parameter model of component SelectRoom:grid: xxx --
no source to determine list type from
location
context:SelectRoom.tml, line 11, column 141
I understand the issue - Tapestry cannot determine how to format the row
without a valid source object. I do think the grid component's behavior
is a bit harsh here.
Any suggestions about how to a) avoid this or b) detect the condition
and replace the grid component layout with an appropriate error message?
Thanks!
Chuck
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