I placed validation code for one of my fields inside action's method
and I'm trying to call it using OGNL expression:
@Validation
public class RegistrationAction extends ActionSupport {
private String username;
public boolean isUsernameAvailable() {
// ...
}
@RequiredStringValidator(shortCircuit = true, trim = true, message =
"...")
@FieldExpressionValidator(expression = "isUsernameAvailable()",
message = "...")
public String getUsername() {
return username;
}
}
Instead, when isUsernameAvailable() is supposed to be called I get
this warning in Tomcat console:
"Got result of null when trying to get Boolean."
Why, and how can I fix it?
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