I’m not sure if the initial value of
text is undefined or if it’s empty-string. I don’t get why it
successfully sent the empty-string over instead of sending nothing, maybe you’re
just getting lucky right now J
From: hecubus_eh
[mailto:[EMAIL PROTECTED]
Sent: Saturday, April 02, 2005
8:09 AM
To: flexcoders@yahoogroups.com
Subject: [flexcoders] Re: Help
with binding null data to web service param eters.
Thanks for the reply, explanation and workaround,
Matt!
Can you explain why this logic:
txtCompany.text == undefined ?
'foo':txtCompany.text
didn't return 'foo' in the VO or the WebService
request parameter, and performed the
equivalent of initializing txtCompany.txt?
Thanks again,
Rick...
--- In flexcoders@yahoogroups.com,
Matt Chotin <[EMAIL PROTECTED]> wrote:
> Sorry for not responding sooner...
>
> Binding has some "smarts" that are
getting in your way here. Essentially
> the first time binding looks at a value it
checks to see if the value is
> null, undefined, or empty string. If it
is any of those it will not copy
> the value over. Until the value has
turned into something that is not one
> of those "non-values" it binding
does not execute. The reason we do this is
> that many times there is to allow the
destination of a binding to have an
> initial value that does not disappear until a
real replacement is ready.
> For example, if we did not do this logic and
you used binding from a web
> service to populate an image source, rather
than the image not loading until
> the web service had returned, you'd see the
"image not found" icon.
>
> So, this is why you have no values. And
it's also why the test where you
> try to return '' isn't working, the '' is
empty-string which means "don't
> copy." So what I'd do as a quick
workaround is go ahead and simply write an
> initialize handler that sets all of the web
service request properties to
> null.
>
> <mx:Script>
> function initWS()
> {
>
wsCustomer.methCustMatches.request.txtZip = null;
>
wsCustomer.methCustMatches.request.txtLastLastName = null;
>
wsCustomer.methCustMatches.request.txtFirstName = null;
> ...
> }
> </mx:Script>
>
> Sorry for the confusion,
>
> Matt
>
> -----Original Message-----
> From: hecubus_eh
> To: flexcoders@yahoogroups.com
> Sent: 3/30/2005 9:12 PM
> Subject: [flexcoders] Help with binding null
data to web service parameters.
>
>
> I'm building a simple Flex form that has
several TextInput fields
> that a person can use as search
criteria. They are basically
> optional fields.
>
> The text from the TextInput fields are bound
directly to a set of web
> service request parameters that is sending to
a CFC-based WSDL.
>
> The problem I'm running into is that if any
of the TextInput fields
> are not filled in by the user, no value is
being passed to the web
> service request
> parameters that the TextInput.text values are
bound to. The result
> is that they are
> treated as null by the WebService and the
parameters are not sent in
> the SOAP request.
> Since all parameters are required in a WSDL,
the web service is
> resulting in a SOAP
> message that some parameters are not being passed
into the request.
>
> Here is a code snippet:
>
> --------------------------------
>
> <?xml version="1.0"
encoding="utf-8"?>
> <mx:Application xmlns:mx="http://www.macromedia.com/2003/mxml
> <http://www.macromedia.com/2003/mxml>
"
> xmlns:r="view.*"
pageTitle="Customer Search" initialize="">
>
<mx:WebService
> wsdl="http://localhost/Customer.cfc?wsdl
> <http://localhost/Customer.cfc?wsdl>
" id="wsCustomer">
>
<mx:operation name="methCustMatches">
>
<mx:request>
>
<txtZip>{txtZip.text}</txtZip>
>
<txtLast>{txtLastName.text}</txtLast>
>
<txtFirst>{txtFirstName.text}</txtFirst>
>
<txtPhone>{txtPhone.text}</txtPhone>
>
<txtCompany>{txtCompany.text}</txtCompany>
>
>
<CustomerNumber>{CustomerNumber.text}</CustomerNumber>
>
</mx:request>
>
</mx:operation>
>
</mx:WebService>
>
<mx:Script>
>
<![CDATA[
>
function sendReq(event) {
>
wsCustomer.methCustMatches.send();
>
}
> ]]>
>
</mx:Script>
>
>
<mx:TextInput text="" id="numShipTo"
width="100" maxChars="9"
> restrict="0-9" />
>
<mx:TextInput text="" id="txtPhone"
width="100" enabled="false"
> maxChars="12" /
> >
>
<mx:TextInput text="" enabled="false"
id="txtCompany" width="100"
> />
>
<mx:TextInput text="" id="txtZip" width="50"
maxChars="11" />
>
<mx:TextInput text="" id="txtFirstName"
width="75" />
> <mx:TextInput
> id="txtLastName"
width="75" />
>
<mx:Button id="submitForm" label="Go"
textAlign="center"
> click="sendReq(event);"/
> >
> </mx:Application>
>
> --------------------------------
>
> That's the first problem...is there a way to
explicitly send the
> parameters that have no
> value, basically as if I did not bind any
variables to the request
> parameters? If I send the
> request with no value inside the parameters
(e.g.
> <txtPhone></txtPhone>), the
> parameters are sent in the SOAP request with
no values, which is fine
> since the WSDL
> doesn't yell at me for not providing all the
parameters.
>
> While debugging this problem, instead of
binding the TextInput text
> value directly to the
> WebService request parameters, I bound the
values to a data model and
> used the model as
> a value object. I then bound the
properties of the object to the
> corresponding parameters
> in the WebService request. The same
error resulted, BUT...I tried to
> use the following code
> to determine what the value of the
TextInput.text was for each
> TextInput:
>
> --------------------------------
>
> <mx:Model id="modelCS">
> ...
>
<txtCompany>{txtCompany.text == undefined ? 'foo':
> txtCompany.text}</txtCompany>
> ...
> </mx:Model>
>
> --------------------------------
>
> I expected the value of modelCS.txtCompany to
be 'foo', but I ended
> up with modelCS.txtCompany resulting in '',
which incidentally the
> WebService
> recognized as an empty string.
Strangely enough, if I used ''
> instead of 'foo' in my simple
> logic test inside the data model, it resulted
in modelCS.txtCompany
> to be undefined.
>
> Does anyone have any idea what's happening
here??? I'll be more than
> happy to go into any more detail if
necessary.
>
> Thanks,
>
> Rick...
>
>
>
>
>
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