on action error message not showing on same page - validation

Question

I have insert and view on same page. but problem is error message not showing
<action name="ViewAllCostings" class="volo.tms.costings.Costings" method="ViewAllCostings">
<result name="success">/costings/costings.jsp</result>
</action>
<action name="addcosting" class="volo.tms.costings.Costings">
<result name="input">/costings/costings.jsp</result>
<result name="success" type="chain">ViewAllCostings</result>
<result name="error" >/costings/costings.jsp</result>
</action>
and costings.jsp
<s:actionerror/>
<s:form action="addcosting" method="post">
<s:textfield label="Costing Type" name="costtype" required="true"/>
<s:textfield label="Cost(rs.)" name="costrs" required="true"/>
<s:submit value="ADD" name="addcostbutton"/>
</s:form>
<div class="Wrapper">
<display:table id="txt" name="costinglist" pagesize="10" cellpadding="2px;" cellspacing="5px;" requestURI="">
<display:column property="costtype" title="Cost Type" sortable="true"></display:column>
<display:column property="costrs" title="Cost(rs.)" sortable="true"></display:column>
</display:table></div>
and action class
public String execute(){//used this method for insert data
ArrayList costList = new ArrayList();
costList.add(costtype);
costList.add(costrs);
costList.add(costid);
if (AddCostDao.insertEditCostDetails(costList)) {
return SUCCESS;
} else {
addActionError("Employee name already exists !");
return ERROR;
}}
public String ViewAllCostings(){
//used for view data using list
return SUCCESS
}
did not getting error message. I tried but not getting solution

Answer 1

You might have validation errors which results INPUT, but the action is not executed and message isn't set. If you want to prevent the action from validation you can configure the action to exclude the method from validation interceptor. As far as validation interceptor implements a method filter interceptor you can do it in struts.xml. Or just add #SkipValidation annotation on the method.
#SkipValidation
public String execute(){//used this method for insert data