Select component should provide control over a blank option for optional selects
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Key: TAPESTRY-2214
URL: https://issues.apache.org/jira/browse/TAPESTRY-2214
Project: Tapestry
Issue Type: New Feature
Components: tapestry-core
Affects Versions: 5.0.10
Reporter: Howard M. Lewis Ship
When using the Select component, you must explicitly add a blank value to the
list of possible values if the selection is optional. It would be nice if
there was greater control over this.
1) If the property is optional (as per validation via the validate parameter)
then a blank value should appear.
2) When a blank value is added, there needs to be control over the label for
the blank value.
3) It would be nice if it were possible to override the validator to "force"
the Select to include a blank value even if required.
I think it is reasonable for the blank option to appear first, before an option
groups or individual options.
This would be very useful for search forms, or forms where it is desired that
the user be forced to make a selection.
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