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From "Geoff Callender (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (TAP5-1896) AjaxFormLoop corrupts list when redisplayed after Remove then server-side failure
Date Thu, 12 Apr 2012 13:29:17 GMT

    [ https://issues.apache.org/jira/browse/TAP5-1896?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13252414#comment-13252414
] 

Geoff Callender commented on TAP5-1896:
---------------------------------------

It seems to be that Form's Validation Tracker knows about added rows (thanks to the FormInjector?)
but not removed rows - on redisplay it expects them to still be there.
                
> AjaxFormLoop corrupts list when redisplayed after Remove then server-side failure
> ---------------------------------------------------------------------------------
>
>                 Key: TAP5-1896
>                 URL: https://issues.apache.org/jira/browse/TAP5-1896
>             Project: Tapestry 5
>          Issue Type: Bug
>          Components: tapestry-core
>    Affects Versions: 5.3, 5.2
>            Reporter: Geoff Callender
>            Priority: Critical
>
> To see the effect use an AjaxFormLoop with input field(s) and at least 3 rows built from
existing data. It must be in a Form.
> Remove row n. 
> Submit, ensuring in some way that you get a server-side validation error.
> The redisplayed loop will have all the right output values, but the input values will
be corrupted:
> - the removed row (n) will be missing (good), 
> - row n+1 will be correct (good),
> - every row below that will have input values that belong to the row before it (bad).
> If you try the process again but this time remove 2 adjacent rows you'll get:
> - the removed rows (n-1 and n) will be missing (good), 
> - row n+1 will be correct (good), 
> - row n+2 will be correct (good),
> - every row below that will have input values that belong 2 rows before it (bad).

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