For the immediate problem, add some code to the function that checks the first parameter for null, and returns a null value of the appropriate type in that case.
But for a more robust application, you should stop using lastResult. Direct use of lastResult is really only appropriate for prototyping. You are much better off using a result handler to process the result, handling the special cases, and putting the appropriate values into variables that you then use for the binding. --- In flexcoders@yahoogroups.com, "Brad Bueche" <[EMAIL PROTECTED]> wrote: > > This gets rid of the data binding waring but then the chart itself blows > up saying its getting null objects. > > brad > > -----Original Message----- > From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On > Behalf Of jer_ela > Sent: Monday, February 04, 2008 4:01 PM > To: flexcoders@yahoogroups.com > Subject: [flexcoders] Re: Embedding String Variable in dataprovider name > > > > you can use a method to get around that > > dataProvider="{getDp(chartXML2.lastResult, month)}" > > private function getDp(lastResult:Object, month:String):String > { return lastResult[month].day; > } > > The method will be called when ever one of it parameters is changed > > --- In [EMAIL PROTECTED] <mailto:flexcoders%40yahoogroups.com> > ups.com, "Brad Bueche" <brad@> wrote: > > > > That worked! > > > > I still get the following warning: > > > > Data binding will not be able to detect changes when using square > > bracket operator. For Array, please use ArrraCollection.getItemAt() > > instead. > > > > But it still works. > > > > brad > > > > -----Original Message----- > > From: [EMAIL PROTECTED] <mailto:flexcoders%40yahoogroups.com> > ups.com [mailto:[EMAIL PROTECTED] > <mailto:flexcoders%40yahoogroups.com> ups.com] On > > Behalf Of jer_ela > > Sent: Friday, February 01, 2008 3:01 PM > > To: [EMAIL PROTECTED] <mailto:flexcoders%40yahoogroups.com> ups.com > > Subject: [flexcoders] Re: Embedding String Variable in dataprovider > name > > > > > > > > If you use the square brackets then you don't use the dot so it should > > be: > > > > dataProvider="{chartXML2.lastResult[month].day}" > > > > --- In [EMAIL PROTECTED] <mailto:flexcoders%40yahoogroups.com> > > ups.com, Maciek Sakrejda <msakrejda@> wrote: > > > > > > I'm no e4xpert, but > > > > > > dataProvider="{chartXML2.lastResult.[month].day}" > > > > > > should do it. > > > > > > -- > > > Maciek Sakrejda > > > Truviso, Inc. > > > http://www.truviso. <http://www.truviso. <http://www.truviso.com> > com> com > > > > > > -----Original Message----- > > > From: brad.bueche <brad@> > > > Reply-To: [EMAIL PROTECTED] <mailto:flexcoders%40yahoogroups.com> > > ups.com > > > To: [EMAIL PROTECTED] <mailto:flexcoders%40yahoogroups.com> > ups.com > > > Subject: [flexcoders] Embedding String Variable in dataprovider name > > > Date: Fri, 01 Feb 2008 15:40:25 -0000 > > > > > > Really what I need to be able to do is insert the variable name in > > this: > > > > > > dataProvider="{chartXML2.lastResult.month.day}" > > > > > > I need to replace the "month" with a string variable name (i.e > public > > > var monthName = "January";) > > > > > > I also need to do the same for the categoryfield as it will not let > me > > > do categoryfield=$String. > > > > > > In PHP this is incredibly easy to do. You just say blah=$string . In > > > fact, in PHP you can embed variable names everywhere. Its very > > > powerful. For instance, in php, for the dataprovider issue above, > i'd > > > just do > > > > > > dataProvider="{chartXML2.lastResult.$StringName.day}" > > > > > > and it'd work just fine. Whats the syntax for doing this in Flex? > > > > > >
