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From "I D (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (TAP5-2500) Label broken when inside zone and attached to a Field after that zone
Date Wed, 09 Sep 2015 12:05:46 GMT

    [ https://issues.apache.org/jira/browse/TAP5-2500?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14736732#comment-14736732

I D commented on TAP5-2500:

No, we're still using beta 33 and can't upgrade due to a different issue, which I'll report

However, as I said, this issue isn't related specifically to FormFragment/TriggerFragment.
Rather, it thwarts any component using @HeartbeatDeferred when such a component is nested
within a Zone, since the Zone's use of Heartbeat breaks the assumption that the deferrence
will be until the end of the page render.

> Label broken when inside zone and attached to a Field after that zone
> ---------------------------------------------------------------------
>                 Key: TAP5-2500
>                 URL: https://issues.apache.org/jira/browse/TAP5-2500
>             Project: Tapestry 5
>          Issue Type: Bug
>          Components: tapestry-core
>    Affects Versions: 5.4
>            Reporter: I D
> This is just one example, since the same problem is observed for TriggerFrament inside
a zone when used in conjunction with a FormFragment outside the zone (and after it).
> {code:xml}
>     <t:zone t:id="myZone">
>         <t:label for="myField">Label</t:label>
>     </t:zone>
>     <t:textfield t:id="myField"/>
> {code}
> The reason this doesn't work is because Label.updateAttributes() uses @HeartbeatDeferred
and assumes this invocation will be deferred until the end of the *page* render. Alas, since
the label is inside a zone, which for some reason starts and ends its own heartbeat (nested
within, and occluding, the page heartbeat), the invocation is deferred only until the end
of the *zone* render, i.e. - too early.
> Apparently this bug was introduced in [this commit|https://github.com/apache/tapestry-5/commit/cc6fe5f3f85001eca4e0aa6a79c3bedc3e36b82c],
which in turn was addressing [TAP5-940|https://issues.apache.org/jira/browse/TAP5-940].

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