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https://issues.apache.org/jira/browse/TAP5-869?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12800165#action_12800165
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Torsten Krüger commented on TAP5-869:
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When Submit is used inside Grid, context value from last loop iteration is
always taken as "selected" event argument.
In contrast to Loop setting defer="false" does not solve the issue for Grid.
Using eventlink with an encapsulated button instead of submit causes the event
to occur twice!
> When Submit is used inside Loop and configured as defered (default), context
> value from last loop iteration is always taken as "selected" event argument
> --------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: TAP5-869
> URL: https://issues.apache.org/jira/browse/TAP5-869
> Project: Tapestry 5
> Issue Type: Bug
> Components: tapestry-core
> Affects Versions: 5.1.0.5
> Reporter: Vjeran Marcinko
>
> One of major uses of Submit's "context" parameter is when Submit is used
> inside Loop to be able to distinguish which button was pressed.
> Unfortunately, always context value from last loop iteration gets passed via
> "selected" event argument, making it always look as if last iteration submit
> was selected.
> When "defer" parameter is set to false (it's true by default), then
> everything works fine.
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