Jeff, Thanks for the tips on this... Is there anywhere I can get this type of in-depth information regarding Flex from documentation?
All the books I've checked out are really more focused on the Builder aspect of Flex, not on Flex Data Services. The one that looks promising at RIAbook.com seems to be unavailable as of yet, maybe it should be MIAbook.com ;-) Thanks JK --- In [email protected], "Jeff Vroom" <[EMAIL PROTECTED]> wrote: > > 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: [email protected] [mailto:[EMAIL PROTECTED] On > Behalf Of ripe101 > Sent: Thursday, January 25, 2007 3:05 PM > To: [email protected] > 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 [email protected] <mailto:flexcoders% 40yahoogroups.com> > , "ripe101" <ripe909@> 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 > > >
