I want an argument in my xml field-element, for the max and min length validation. I have done it based on the dtd file but it doesn't work. The validator doesn't get the value. So I get a nullpointer exception.

How must I write the argument in the field element?

      <field property="name"
        depends="required,minlength,maxlength">
        <arg0 key="register.validate.name"/>
        <arg1 name="minlength"
              key="${var:minlength}" 
              resource="false"/>
        <arg1 name="maxlength"
              key="${var:maxlength}"
              resource="false"/>
        <var>
          <var-name>minlength</var-name>
          <var-value>1</var-value>
        </var>
        <var>
          <var-name>maxlength</var-name>
          <var-value>255</var-value>
        </var>
      </field>

Where:

  • Arg0 is the argument for all 3 rules - required, min & max len.
  • Arg1 name="minlength" is used by minlength
  • Arg1 name="maxlength" is used by maxlength
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