Validator question

[Tom Bednarz <li...@bednarz.ch>]

I have a FormBean derived from ValidatorActionForm. I define validation 
rules for certain properties in validation.xml.

No I like to add some additional validations which depend on user input. 
I thought, I can handle this in the validate(..) method but it gets 
never called!

I implemented something like:

public class QueryTripsForm extends ValidatorActionForm
{
    ...
    public ActionErrors validate(ActionMapping mapping,
             javax.servlet.ServletRequest request)
    {
	ActionErrors e = null;
	super.validate(mapping, request);
	// doing some special checks here
         // ......		
	return e;
    }
    ....
}

Why is this validate method never called? (validate is set to true, see 
below)

     <action
       input="/form/queryTrips.jsp"
       name="queryTripsForm"
       path="/listTrips"
       scope="request"
       validate="true"
       type="ch.smartsol.struts.action.ListTripsAction">
       <forward name="Success" path="/template/ShowTripsResult.jsp" />
     </action>

Is there any way to combile 'default' validations defined in 
validation.xml with additional validations implemented in the validate() 
method??

Many thanks for your help.

Tom



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Re: Validator question

[Laurie Harper <la...@holoweb.net>]

Tom Bednarz wrote:
> I have a FormBean derived from ValidatorActionForm. I define validation 
> rules for certain properties in validation.xml.
> 
> No I like to add some additional validations which depend on user input. 
> I thought, I can handle this in the validate(..) method but it gets 
> never called!
> 
> I implemented something like:
> 
> public class QueryTripsForm extends ValidatorActionForm
> {
>    ...
>    public ActionErrors validate(ActionMapping mapping,
>             javax.servlet.ServletRequest request)
>    {
>     ActionErrors e = null;
>     super.validate(mapping, request);
>     // doing some special checks here
>         // ......       
>     return e;
>    }
>    ....
> }

That looks OK. Are you sure you want to extend ValidatorActionForm 
rather than just ValidatorForm? The effect is subtly different. You 
haven't posted your validation config, so I can't tell which would be 
correct for your useage.

> Why is this validate method never called? (validate is set to true, see 
> below)
> 
>     <action
>       input="/form/queryTrips.jsp"
>       name="queryTripsForm"
>       path="/listTrips"
>       scope="request"
>       validate="true"
>       type="ch.smartsol.struts.action.ListTripsAction">
>       <forward name="Success" path="/template/ShowTripsResult.jsp" />
>     </action>

How is the form declared in struts-config.xml? What URL are you 
accessing? Assuming your form is declared with the name 'queryTripsForm' 
and you're actually hitting this action mapping, validate() should be 
getting called I think.

> Is there any way to combile 'default' validations defined in 
> validation.xml with additional validations implemented in the validate() 
> method??

Yes, with a slight correction to your code above:

     ActionErrors e = super.validate(mapping, request);

You need to capture the errors from the 'default' validation process or 
they'll be discarded.

L.


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