Is this a place where I can ask for some help on the valueForKeyPath method as
implemented in Javascript in a WebKit browser such as Mobile Safari? If not,
then where is a better venue for my question?
In Dashcode I have defined a data source from an remote XML file, and the XML
looks like this:
<waters>
<water>
<name water_id='79'>Agean Sea at Kos, Greece</name>
<collectors>
<collector collector_id='20'>
<last_name>Calarco</last_name>
</collector>
</collectors>
<description>Pascal collected...</description>
</water>
<water>
<name water_id='37'>Amazon River, Peru</name>
<collectors>
<collector collector_id='8'>
<last_name>Morgan</last_name>
</collector>
</collectors>
<description>Mom collected...</description>
</water>
</waters>
I have then bound elements like name, last_name, and description to various
interface elements. Through Javascript I have been able to manipulate these
elements as well the collector_id attribute. All this works as expected.
Unfortunately, I am unable to access the water_id attribute. While the water_id
attribute displays as a part of my data source and list views, whenever I try
to actually access the water_id attribute my application crashes as illustrated
by the linked screen shot. [1]
To debug the situation I created a button with the following code using the
valueForKeyPath, and as you can see I can access other elements and attributes
but not the water_id attribute:
function getID(event)
{
// get my data
var d = dashcode.getDataSource( 'list' );
// the following code works
//var r = d.valueForKeyPath( 'selection.collectors.collector.$collector_id'
);
// this code works too
//var r = d.valueForKeyPath( 'selection.collectors.collector.last_name' );
// so does this code
//var r = d.valueForKeyPath( 'selection.name' );
// why doesn't this code work! water_id is an attribute of the name element
var r = d.valueForKeyPath( 'selection.name.$water_id' );
// echo
alert( r );
}
What am I doing wrong? Any assistance or pointers would be greatly appreciated.
[1] screen shot - http://infomotions.com/tmp/screen-dump.png
--
Eric Lease Morgan
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