Konrad Windszus created SLING-4013:
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Summary: Allow validator to act on non-required properties
Key: SLING-4013
URL: https://issues.apache.org/jira/browse/SLING-4013
Project: Sling
Issue Type: Improvement
Components: Extensions
Reporter: Konrad Windszus
Currently all properties which are bound to a validator are automatically
mandatory
(https://github.com/apache/sling/blob/trunk/contrib/validation/core/src/main/java/org/apache/sling/validation/impl/ValidationServiceImpl.java#L384),
i.e. if the property is not set a validation error will occur.
In some cases the property is not required but if it is there (and not empty)
it should be valid according to the validator.
I propose a new attribute {{propertyOptional}} with a boolean value below the
properties node of a validation node. The default should be false (i.e.
property is required)
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