How to validate a select tag in struts 2 framework

Question

Hi people, I am a newbie into programming and i am currently employed as a junior programmer. I am currently having some problems validating the select tags in one of my forms. What i actually trying to do is to ensure that one item is selected before the user submits the form .

In the form i have;

<s:select list="assessmentTypes" headerKey="0" headerValue=" -- Select One --"
          listKey="id" value="name" listValue="name" key="course.assessmenttype"
          name="assessmenttype.id"/>

I have some knowledge of validation but not to sure how to do it for the select list.

I tried using a normal validation with strings but i don't think it is required in this case. for example;

<field name="course.assessmenttype">
    <field-validator type="requiredstring">
        <message>Please Select a value</message>
    </field-validator>
</field>

all help would be appreciated, Thanks in advance.

Answer 1

One option is to use an int validator with a min value set. Since you want any value greater than 0.

     <field name="course.assessmenttype">
          <field-validator type="int">
              <param name="min">1</param>
              <message>Please Select a value to continue</message>
          </field-validator>
      </field>