Struts Validator problems with null message values

[Spicalino]

I often have problems with my message substitution values when multiple validation rules apply to one field. In the example below if I type a password which is too short I get the message:

Password must be greater than 5 characters long.

This is correct. However if I type a password which is too long I get:

Password must be less than null characters long.

Obviously this is wrong.

I have the following form bean in Struts Config.xml:
...
<form-bean name="signup" type="org.apache.struts.validator.DynaValidatorForm">
<form-property name="name" type="java.lang.String"/>
<form-property name="email" type="java.lang.String"/>
<form-property name="password" type="java.lang.String"/>
<form-property name="confirmPassword" type="java.lang.String"/>
</form-bean>
...

and the following in Valiation.xml
...
<form name="signup">
<field property="name" depends="required,mask,maxlength">
<arg0 key="validation.name"/>
<arg1 name="maxlength" key="${var:maxlength}" resource="false"/>
<var>
<var-name>mask</var-name>
<var-value>^[0-9a-zA-Z]*$</var-value>
</var>
<var>
<var-name>maxlength</var-name>
<var-value>20</var-value>
</var>
</field>
<field property="email" depends="required,email">
<arg0 key="validation.email"/>
</field>
<field property="password" depends="required,mask,minlength,maxlength">
<arg0 key="validation.password"/>
<var>
<var-name>mask</var-name>
<var-value>^[0-9a-zA-Z]*$</var-value>
</var>
<arg1 name="minlength" key="${var:minlength}" resource="false"/>
<var>
<var-name>minlength</var-name>
<var-value>5</var-value>
</var>
<arg2 name="maxlength" key="${var:maxlength}" resource="false"/>
<var>
<var-name>maxlength</var-name>
<var-value>20</var-value>
</var>
</field>
<field property="confirmPassword"
depends="required,mask,minlength,maxlength,twofields">
<arg0 key="validation.confirmPassword"/>
<var>
<var-name>mask</var-name>
<var-value>^[0-9a-zA-Z]*$</var-value>
</var>
<arg1 name="minlength" key="${var:minlength}" resource="false"/>
<var>
<var-name>minlength</var-name>
<var-value>5</var-value>
</var>
<arg2 name="maxlength" key="${var:maxlength}" resource="false"/>
<var>
<var-name>maxlength</var-name>
<var-value>20</var-value>
</var>
<arg3 key="validation.confirmPassword" resource="false"/>
<var>
<var-name>secondProperty</var-name>
<var-value>password</var-value>
</var>
</field>
</form>
...

Any Ideas?

Thanks.

[rushiku]

First off, the arg0...arg5 tags are deprecated, use <arg position='n'... instead.
Not only are they deprecated, but the intent is now clearer. arg3, or arg position='3', is not the third arg for that field, but the arg for the third position in the message of the particluar rule being addressed.

The error message for maxlength is:
errors.maxlength={0} can not be greater than {1} characters.

So you must provide an arg position='1' value for maxlength for the replacement to work properly. (as opposed to the arg position='2' you currently have)

You can do this by providing the name of the validator rule in the arg tag, as below
<arg position="1" name="maxlength" key="32" resource="false"/>

Likewise, you can provide the arg for minlength position='1' in the same way:
<arg position="1" name="minlength" key="5" resource="false"/>

If you omit the name attribute, then it will be a general arg and used for all the rules in that field validation, such as:
<arg position="0" key="validation.password"/>

[Spicalino]

Excelent, many thanks.