One of the nice ways to handle these situations in Flex is to use data
binding. Since the system listens for and handles events automatically,
you can do something like this in MXML:
currentState="{theUser.length > 1 &&
theUser.getItemAt(0).administratorGroupKey == 1 ? 'AdminOption' : ''}"
This is a bit awkward because of the > and & chars in the data binding
expression. It is easier when you are dealing with the return value
of the "getItem" method since that has a simple "result" property you
can bind to, or when you are binding to the array collection as a whole
since you can bind to theUser property directly.
If data binding is not appropriate, the other change I'd recommend is
that rather than adding the processAdminOption as a listener for the
"result" event on the ID_USERS data service, I'd set processAdminOption
as a responder on the AsyncToken returned by the fill. It is a
stylistic change but I find it easier to manage responders to specific
fill operations rather than use the event which is fired for any
operation performed on that data service. It avoids the if/else logic
in your event handler to figure out which operation this is.
Jeff
________________________________
From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On
Behalf Of ripe101
Sent: Thursday, January 25, 2007 3:05 PM
To: flexcoders@yahoogroups.com
Subject: [flexcoders] Re: DataService fill not filling on first try?
timing issue?
Continuing in the tradition of replying to my own posts when I find
the solution...
I found the issue is caused by the fill method being processed
asynchronously to the actionscript execution (duh!) I didn't know
that obviously ;)
I just moved my code that processes the returned object into an event
handler that gets called when a result is returned by the fill...
So one question, is there a way to avoid "filling" the first array
collection and just dealing with the object that is returned in the
ResultEvent?
it looks like this (it's ugly):
private function getAdminOption(username:String):void
{
var theUser:ArrayCollection = new ArrayCollection;
ID_USERS.addEventListener("result", processAdminOption);
ID_USERS.fill(theUser,"IdUser.single",[username]);
}
private function processAdminOption(event: ResultEvent):void
{
if (event.result.length != 0)
{
if (event.result[0].administratorGroupKey == 1)
{
currentState='AdminOption';
}
else
{
currentState='';
}
}
else
{
currentState='';
}
}
cheers,
JK
--- In flexcoders@yahoogroups.com <mailto:flexcoders%40yahoogroups.com>
, "ripe101" <[EMAIL PROTECTED]> wrote:
>
> I have a fill method being called in an event handler, and I can
see
> the correct data coming back in FDS (from Hibernate), but my
> ArrayCollection is empty the first time the method is called.
>
> If I trigger the exact same event with the same parameter a second
> time it behaves as expected. I think I am missing something
subtle...
>
> the event handler is as follows:
>
> private function getAdminOption(username:String):void
> {
> var theUser:ArrayCollection = new ArrayCollection;
> ID_USERS.fill(theUser,"IdUser.single",[username]);
> if (theUser.length != 0)
> {
> if (theUser.getItemAt(0).administratorGroupKey == 1)
> {
> currentState='AdminOption';
> }
> else
> {
> currentState='';
> }
> }
> }
>
> Anyone else seen this happen?
>
> Thanks
> JK
>
