PlaceholderBlock should implement RenderCommand
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Key: TAP5-1890
URL: https://issues.apache.org/jira/browse/TAP5-1890
Project: Tapestry 5
Issue Type: Bug
Components: tapestry-core
Affects Versions: 5.3.2, 5.4
Reporter: Dragan Sahpaski
Priority: Trivial
If we have an empty zone like this:
<t:zone t:id="myZone" />
zone.getBody() fails to update the zone in an event handler with the following
exception:
org.apache.tapestry5.ioc.util.UnknownValueException
A component event handler method returned the value <PlaceholderBlock>. Return
type
org.apache.tapestry5.internal.structure.ComponentPageElementImpl$PlaceholderBlock
can not be handled.
This is because ComponentPageElementImpl.PlaceholderBlock does not implement
RenderCommand.
A patch is provided with a test that fails.
I would highly appreciate it if a commiter applies it to the 5.4. branch and to
the 5.3. branch.
Cheers,
Dragan Sahpaski
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