Apache Struts 2 Documentation > Home > Guides > Core Developers Guide > Validation > conditionalvisitor validator |
The ConditionalVisitorFieldValidator will forward validation to the VisitorFieldValidator only if the expression will evaluate to true.
<field name="colleaguePosition"> <field-validator type="conditionalvisitor"> <param name="expression">reason == 'colleague' and colleaguePositionID == 'OTHER'</param> <message>You must select reason Colleague and position Other</message> </field-validator> </field>