Dynamic Lookups on a repeating Instance

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Dynamic Lookups on a repeating Instance

by Chris Grocott :: Rate this Message:

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Is this a bug ?

When I select as value from a dynamic lookup (SELECT1) and then move to the next repeat of the instance, the SELECT1’s in all repeats of the instance re-size which is annoying. What is more of a problem is that the value I have just selected in the REPEAT I have just left disappears from the screen – despite being present and correct in the instance (proved by displaying it as output on the screen and viewing it through Mozilla Forms Buddy).

To explain this I have borrowed the wikibook example from (“XForms / Dynamic Selection Lists” ) and amended it, firstly to use nodes rather than elements, and secondly to work on a REPEAT rather than a single occurrence instance. This XHTML code is a simple example:

<html xmlns="http://www.w3.org/1999/xhtml" xmlns:ev="http://www.w3.org/2001/xml-events" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xf="http://www.w3.org/2002/xforms">
<head>
<title>Test conditional Selection Lists / Dynamic Lookups</title>
<xf:model id="data_model">
<xf:instance xmlns="" id="data">
<dataset>
<data>
<selected-season>winter</selected-season>

<selected-month/>
</data>
<data>
<selected-season>spring</selected-season>
<selected-month/>
</data>
<data>
<selected-season>summer</selected-season>

<selected-month/>
</data>
<data>
<selected-season>autumn</selected-season>
<selected-month/>
</data>
</dataset>
</xf:instance>

<xf:instance xmlns="" id="seasons">
<root>
<item>winter</item>
<item>spring</item>
<item>summer</item>
<item>autumn</item>
</root>

</xf:instance>
<xf:instance xmlns="" id="months">
<root>
<item1>
<name>January</name>
<season>winter</season>
</item1>
<item1>

<name>February</name>
<season>winter</season>
</item1>
<item1>
<name>March</name>
<season>spring</season>
</item1>

<item1>
<name>April</name>
<season>spring</season>
</item1>
<item1>
<name>May</name>
<season>spring</season>

</item1>
<item1>
<name>June</name>
<season>summer</season>
</item1>
<item1>
<name>July</name>

<season>summer</season>
</item1>
<item1>
<name>August</name>
<season>summer</season>
</item1>
<item1>

<name>September</name>
<season>autumn</season>
</item1>
<item1>
<name>October</name>
<season>autumn</season>
</item1>

<item1>
<name>November</name>
<season>autumn</season>
</item1>
<item1>
<name>December</name>
<season>winter</season>

</item1>
</root>
</xf:instance>
</xf:model>
</head>
<body>
<h4>Test conditional Selection Lists / Dynamic Lookups - month selector depends on the current season</h4>
<p>NOTE 1: This version was amended form the Wikibook example to use nodes rather than attributes and to work with a REPEAT</p>

<p>NOTE 2: Once the month is selected from the Season restricted SELECT1, after the selection when you move to the next REPEAT, it doesn't always display </p>
<p>in its SELECT1. However, it is present in the output on the screen and also in the instance (when viewed through Mozilla Forms Buddy)</p>
<table>
<xf:repeat model="data_model" id="data_repeat" nodeset="/dataset/data">
<tr>
<td>
<xf:select1 ref="selected-season">
<xf:label>Season:</xf:label>

<xf:itemset nodeset="instance('seasons')/item">
<xf:label ref="."/>
<xf:value ref="."/>
</xf:itemset>
</xf:select1>
</td>
<td>
<xf:select1 ref="selected-month">
<xf:label>Month:</xf:label>

<xf:itemset nodeset="instance('months')/item1[season=instance('data')/data[index('data_repeat')]/selected-season]">
<xf:label ref="name"/>
<xf:value ref="name"/>
</xf:itemset>
</xf:select1>
</td>
<td>
<xf:output ref="selected-season">
<xf:label>Selected Season: </xf:label>
</xf:output>
<xf:output ref="selected-month">
<xf:label>Selected Month: </xf:label>
</xf:output>
</td>
</tr>
</xf:repeat>
</table>
</body>
</html>

I also get the same results in my larger .XQL dynamic XForm.

Is this a bug and does anybody have any suggestion as to why the value disappears from the screen ?

Chris

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