validator exception in Struts 1

[shanky raja]

i am getting the below exception in a struts application used with validation framework.


18 Dec, 2012 6:06:57 PM org.apache.struts.validator.ValidatorForm validate
SEVERE: No ValidatorAction named required found for field sid
org.apache.commons.validator.ValidatorException: No ValidatorAction named required found for field sid
at org.apache.commons.validator.Field.handleMissingAction(Field.java:897)
at org.apache.commons.validator.Field.validate(Field.java:873)
at org.apache.commons.validator.Form.validate(Form.java:288)
at org.apache.commons.validator.Validator.validate(Validator.java:351)
at org.apache.struts.validator.ValidatorForm.validate(ValidatorForm.java:116)
at org.apache.struts.chain.commands.servlet.ValidateActionForm.validate(ValidateActionForm.java:58)
at org.apache.struts.chain.commands.AbstractValidateActionForm.execute(AbstractValidateActionForm.java:120)
at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191)
at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:305)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191)
at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
at java.lang.Thread.run(Unknown Source)
18 Dec, 2012 6:06:57 PM org.apache.struts.chain.commands.servlet.CreateAction createAction
INFO: Initialize action of type: com.jlc.struts1.RegisterAction


Different files used in this application are:-

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" 
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" 
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>StrutsLab6</display-name>
  <welcome-file-list>
    <welcome-file>register.jsp</welcome-file>
  </welcome-file-list>
  <servlet>
  	<servlet-name>action</servlet-name>
  	<servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
  	<init-param>
  		<param-name>config</param-name>
  		<param-value>/WEB-INF/struts-config.xml</param-value>
  	</init-param>
  	<load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
  	<servlet-name>action</servlet-name>
  	<url-pattern>*.do</url-pattern>
  </servlet-mapping>
</web-app>

struts-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.3//EN"
 "http://struts.apache.org/dtds/struts-config_1_3.dtd">
<struts-config>

<form-beans>
	<form-bean name="regForm" type="com.jlc.struts1.RegisterForm"/>
</form-beans>
<global-exceptions/>
<global-forwards>
	<forward name="register" path="/register.jsp"/>
	<forward name="home" path="/home.jsp"/>
</global-forwards>
<action-mappings>
	<action path="/RegSubmit" 
			name="regForm"
			type="com.jlc.struts1.RegisterAction"
			scope="session"
			validate="true"
			input="/register.jsp"/>
</action-mappings>
<message-resources parameter="com.jlc.struts1.messages"/>
<plug-in className="org.apache.struts.validator.ValidatorPlugIn">
<set-property property="pathnames" value="/WEB-INF/validator-rules.xml,/WEB-INF/myform-validations.xml"/>
</plug-in>
</struts-config>

validator-rules.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE form-validation PUBLIC "-//Apache Software Foundation//DTD Commons Validator Rules Configuration 1.0//EN" 
"http://jakarta.apache.org/commons/dtds/validator_1_3.dtd">
<form-validation>
<global>
<validator name="sidformat"
	classname="com.jlc.struts1.JLCFieldChecks"
	method="validateSidFormat"
	methodParams="java.lang.Object,
				  org.apache.commons.validator.ValidatorAction,
				  org.apache.commons.validator.Field,
				  org.apache.struts.action.ActionErrors,
				  javax.servlet.http.HttpServletRequest"
	msg="errors.sidformat">
</validator>
<validator name="coursesRequired"
	classname="com.jlc.struts1.JLCFieldChecks"
	method="coursesRequired"
	methodParams="java.lang.Object,
				  org.apache.commons.validator.ValidatorAction,
				  org.apache.commons.validator.Field,
				  org.apache.struts.action.ActionErrors,
				  javax.servlet.http.HttpServletRequest"
	msg="errors.course.required">
</validator>
</global>
</form-validation>

myform-validations.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE form-validation PUBLIC "-//Apache Software Foundation//DTD Commons Validator Rules Configuration 1.0//EN" 
"http://jakarta.apache.org/commons/dtds/validator_1_3.dtd">
<form-validation>
<formset>
<form name="regForm">
<field property="sid" depends="required,sidformat">
<arg0 key="SID" resource="false"/>
</field>
<field property="username" depends="required,minlength,maxlength">
<arg0 key="Username" resource="false"/>
<arg1 key="${var:minlength}" resource="false"/>
<arg2 key="${var:maxlength}" resource="false"/>

<var>
<var-name>minlength</var-name>
<var-value>5</var-value>
</var>
<var>
<var-name>maxlength</var-name>
<var-value>10</var-value>
</var>
</field>
<field property="password" depends="required,minlength,maxlength">
	<arg0 key="Password" resource="false"></arg0>
	<arg1 key="${var:minlength}" resource="false"/>
	<arg2 key="${var:maxlength}" resource="false"/>
	<var>
		<var-name>minlength</var-name>
		<var-value>6</var-value>
	</var>
	<var>	
		<var-name>maxlength</var-name>
		<var-value>10</var-value>
	</var>
</field>
<field property="email" depends="required,email">
<arg0 key="Email ID" resource="false"/>
</field>
<field property="dob" depends="required,date">
<arg0 key="DOB" resource="false"/>
<var>
<var-name>datePattern</var-name>
<var-value>dd/MM/yyyy</var-value>
</var> 
</field>
<field property="phone" depends="required,long">
<arg0 key="Phone" resource="false"/>
</field>
<field property="fee" depends="required,double">
<arg0 key="Fee" resource="false"/>
</field>
<field property="course" depends="coursesRequired"></field>
</form>
</formset>
</form-validation>

[Raaja Gotluru]

Hi,

If you have removed or not configured the required rule then that is the reason the compiler is throwing that error. Just copy and place the required rule from the original file available in any of the web example provided by struts.