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List: tapestry-user
Subject: Re: Multiple new objects with a component
From: Geoff Callender <geoff.callender.jumpstart () gmail ! com>
Date: 2014-04-15 22:47:02
Message-ID: F9BA0EC4-9CE9-4229-B29C-AC0AE6E40A7C () gmail ! com
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On each Loop, try formstate="iteration". Here's an example:
http://jumpstart.doublenegative.com.au/jumpstart/examples/tables/editableloop1
And for T5.4:
http://jumpstart.doublenegative.com.au/jumpstart7/examples/tables/editableloop1
Cheers,
Geoff
On 16/04/2014, at 12:30 AM, Tony Nelson wrote:
> I am trying to build a form where there are N instances of a custom editing \
> component. For example, something simple like:
> <t:container xmlns:t="http://tapestry.apache.org/schema/tapestry_5_3.xsd">
>
> ${idx} :
> Id: <t:textfield value="domainObj.id" validate="maxLength=5" maxlength="5" /> :
> B: <t:textfield value="domainObj.a" validate="maxlength=10" maxlength="10" />
> <br/>
>
> </t:container>
>
> The component Java code is trivial:
>
> public class EditObject {
>
> @Property
> @Parameter(required = true)
> SimplePojo domainObj;
>
> @Property
> @Parameter(required = false, value = "0")
> Integer idx;
>
> void onValidate() {
> log.info("EditObject onValidate: " + domainObj);
> }
> }
>
>
> There is no AJAX, just a simple posted form.
>
> This component is used like this:
>
> <!DOCTYPE html>
> <html
> xmlns:t="http://tapestry.apache.org/schema/tapestry_5_3.xsd"
> >
> <head>
> <title>Multiple components in a loop</title>
> </head>
> <body>
> <t:form t:id="myForm">
>
> <h3>Group A</h3>
> <t:loop source="groupA" value="domainObj" index="idx" element="div">
> <t:EditObject domainObj="domainObj" idx="idx"/>
> </t:loop>
>
> <h3>Group B</h3>
> <t:loop source="groupB" value="domainObj" index="idx" element="div">
> <t:EditObject domainObj="domainObj" idx="idx"/>
> </t:loop>
>
> <t:submit value="Submit"/>
> </t:form>
> </body>
> </html>
>
> The main controller is very simple:
>
> public class MultiDemo {
> @Inject
> private Logger logger;
>
> @Property
> List<SimplePojo> groupA;
>
> @Property
> List<SimplePojo> groupB;
>
> @Property
> SimplePojo domainObj;
>
> @Property
> Integer idx;
>
> @Log
> void onValidateFromMyForm() {
> for (SimplePojo sp : groupA) {
> logger.info("A: " + sp.toString());
> }
>
> for (SimplePojo sp : groupB) {
> logger.info("B: " + sp.toString());
> }
> }
>
> @Log
> void setupRender() {
> createGroups();
> }
>
> @Log
> void onPrepare() {
> // if this is commented out, I get a NPE in onValidateFromMyForm
> createGroups();
> }
>
> void createGroups() {
> groupA = createGroup();
> groupB = createGroup();
> }
>
> List<SimplePojo> createGroup() {
>
> List<SimplePojo> result = new ArrayList<SimplePojo>();
> for (int i = 0; i < 3; i++) {
> result.add(new SimplePojo());
> }
>
> return result;
> }
> }
>
> That's it, the whole page. But I just can't get it to work.
>
> If I comment out onPrepare() I get a NPE in the onValidateFromMyForm, which makes \
> sense. With it uncommented, onValidateFromMyForm is always new null filled \
> objects.
> The logging in the component onValidate shows domainObj.id being set, but never \
> domainObj.A.
> When the form redraws, it loses any values I typed in and is blank again.
>
> I'm missing something obvious I'm sure, but can't see what it is.
>
> Any help would be greatly appreciated.
>
> Thanks
> Tony
>
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