Re: [Xsltforms-support] Building up URLs from selected values

[Steven P. <ste...@cw...>]

What you have to realise is that <instance src="..." .../> is done during 
XForms initialisation, while other instances are also being initialised. So 
if you are depending on the other instances in order to get your values to 
initialise an instance, you're going to be in trouble.


What you need to do is allow your static instances to be initialised, and 
then initialise your dynamic instances.


You do that with a submission:


	<submission id="initfiles" resource="{SearchResultsUrl}" 
replace="instance" instance="files"/>


(Or on older XForms systems
	
	<submission id="initfiles" replace="instance" instance="files"><resource 
value="SearchResultsUrl"/></submission>


)


and cause this to be done when initialisation is finished:


	<action  ev:event="xforms-ready">
		<send submission="initfiles"/>
	</action>


(or the shorter version


	<send submission="initfiles" ev:event="xforms-ready"/>
)


Hope this helps.


Steven


On Thursday 23 November 2023 17:15:18 (+01:00), Richard Light wrote:



Thanks, Steven.

Dumb follow-up question: if I have the URL I want to load as a data item, 
what syntax do I use in the src attribute to specify that I want to use the 
value of that data item as the URL to load?  Or do I use ref?  This is what 
I have:

Whatever syntax I use for line 58, I get an xforms-link-exception when I 
load the form.  (I'm also trying to prevent the "indexes" instance from 
being used until File is specified. That attribute doesn't seem to be 
making any difference either.)

Thanks,

Richard


On 22/11/2023 20:28, Steven Pemberton wrote:

Attribute value templates work in XForms too, and allow you to build up a 
URL, but you can also use <bind/> with a calculate, see for instance the 
section on maps in the XForms advanced tutorial: 
http://www.cwi.nl/~steven/xforms/advanced/


Best wishes,


Steven

On Wednesday 22 November 2023 18:18:29 (+01:00), Richard Light wrote:



Hi,

I have an XForms scenario where I am interacting with an API, so every item 
of data is fetched via a URL. I want to start with the selection of a file. 
That's straightforward, because I can quote the complete URL to get a list 
of possible values:

The problem occurs when I then want to include the selected file name in 
the URL for the next stage of the query, which is to select the index to 
search. This is the sort of thing I would do in XSLT, using an AVT:

What is the equivalent XForms/XsltForms syntax for including an entered 
value within a string?

Thanks,

Richard


--

Richard Light
ric...@gm... <mailto:ric...@gm...>
@richardofsussex
--

Richard Light
ric...@gm... <mailto:ric...@gm...>
@richardofsussex