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https://issues.apache.org/jira/browse/TAPESTRY-2249?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Howard M. Lewis Ship updated TAPESTRY-2249:
-------------------------------------------

    Fix Version/s: 5.1

> Add a "hidden fields" parameter to BeanEditor and BeanEditForm
> --------------------------------------------------------------
>
>                 Key: TAPESTRY-2249
>                 URL: https://issues.apache.org/jira/browse/TAPESTRY-2249
>             Project: Tapestry
>          Issue Type: Improvement
>          Components: tapestry-core
>    Affects Versions: 5.0.11
>            Reporter: Geoff Callender
>            Priority: Minor
>             Fix For: 5.1
>
>
> A "hidden fields" parameter would allow code like this:
> <t:beaneditform t:id="form" object="person" submitLabel="Save" 
> hidden="version"/>
> instead of this:
> <t:beaneditform t:id="form" object="person" submitLabel="Save">
>       <!-- Include version in the form to prevent it being updated/refreshed 
> in onActivate(), which would defeat optimistic locking. -->
>       <t:parameter name="version">
>                       <t:hidden t:id="version" value="person.version"/>
>       </t:parameter>
> </t:beaneditform>
> Please note this is not the same as using remove, eg:
> <t:beaneditform t:id="form" object="person" submitLabel="Save" 
> remove="version"/>
> which in this example would defeat optimistic locking because version's value 
> would no longer make the round-trip to the client.
> In case it helps, here's what onActivate() might looks like in this example:
>       private Long _personId;
>       @Persist("flash")
>       private Person _person;
>       void onActivate(Long id) throws Exception {
>               _personId = id;
>               if (_person == null) {
>                       _person = getPersonService().findPerson(_personId);
>                       if (_person == null) {
>                               throw new Exception("Person " + _personId + " 
> does not exist.");
>                       }
>               }
>       }

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