On Thu, 11 Oct 2012 11:40:00 -0300, Ken in Nashua <kcola...@live.com>
wrote:
Folks,
Hi!
my Gallery component operates a parameter CURSOR
Gallery.JAVA
@Property
@Parameter(required = true, cache = true, defaultPrefix = "0")
private int cursor;
You're confusing defaultPrefix with default parameter value (which is the
'value' attribute of @Parameter). Remove the defaultPrefix declaration. In
addition, as this parameter is meant to be used as a cursor, setting it to
a default value doesn't make much sense to me.
So my component has a read/write property that I use as a parameter.
In order to update it across request cycles/pages I modeled it as a
property in the containing page HOME.TML
Home.JAVA
@Property
private int cursor;
I dont know why i am getting this error below... i thought I modeled
this properly... didnt I?
Yep. The error is elsewhere.
Failure writing parameter 'cursor' of
component Home:gallerywidget: Binding
org.apache.tapestry5.internal.services.AttributeExpansionBinding@217796
is read-only.locationcontext:Home.tml, line 3631 <t:Gallery
t:id="galleryWidget"
id="galleryWidget"32 collectionType="${coachClass}"33 itemsPerPage="${itemsPerPage}"34 tableColumns="${tableColumns}"35 cursor="${cursor}"36 />37
38 </t:form>
It's a common mistake. :) Never, never, ever use ${} expansions when
passing parameters to a component. I've posted the reason many times in
the mailing list and I'm lazy now, so I won't repeat it here. :P
It should have been:
<t:Gallery t:id="galleryWidget" id="galleryWidget"32
collectionType="coachClass" itemsPerPage="itemsPerPage"
tableColumns="tableColumns" cursor="cursor"/>
--
Thiago H. de Paula Figueiredo
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