> such as extending the property expression syntax to support an
inversion operator
Agreed... I suspect this would have uses beyond the IF component.
On Feb 22, 2007, at 12:14 PM, Howard M. Lewis Ship (JIRA) wrote:
[ https://issues.apache.org/jira/browse/TAPESTRY-1276?
page=com.atlassian.jira.plugin.system.issuetabpanels:comment-
tabpanel#action_12475122 ]
Howard M. Lewis Ship commented on TAPESTRY-1276:
------------------------------------------------
It's more verbose for some things, but I quite often find I need
two ifs: for the normal case, and one for the else case. This
merges both cases together with a minimum of fuss.
I'm not saying the negate parameter is bad (T4 has an equivalent
"invert" parameter), but there may be other options that are
better, such as extending the property expression syntax to support
an inversion operator, i.e.
<t:comp type="if" test="! order.lineItems">
. . .
</t:comp>
Another option would be to create an Unless component:
<t:comp type="unless" test="order.lineItems">
. . .
</t:comp>
I find both of these preferable to a negate or invert parameter.
IF component should include an optional 'negate' parameter
----------------------------------------------------------
Key: TAPESTRY-1276
URL: https://issues.apache.org/jira/browse/
TAPESTRY-1276
Project: Tapestry
Issue Type: New Feature
Components: Core
Affects Versions: 5.0
Environment: MacOS X 10.4.8, Eclipse 3.2.1
Reporter: Randy Leonard
Priority: Minor
Fix For: 5.0
It would be useful for the 'If' component to take an optional
'negate' parameter, much like the WOCondition component in
WebObjects. This would allow the component content to be rendered
if the associated condition is FALSE instead of TRUE, therefore
eliminating the need to write an additional Java method to perform
this negate operation.
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