@In attribute requires non-null value: register.user

[springfans]

Hi there,

I got the following problem on my Seam application. Looking at the error, it seems my properties are not injected by Seam. Thanks beforehand for your help.

The application is to register new user before enabling the user to login to the system.

When clicking "register" on the registration page, debug page appear with the following:

Exception during request processing:
javax.faces.FacesException: javax.el.ELException: //D:/app/eclipse/framework/PROJECT_SRC/TestWeb/WebRoot/register.xhtml @82,76 value="#{register.verify}": org.jboss.seam.RequiredException: @In attribute requires non-null value: register.user
at javax.faces.component.UIOutput.getValue(UIOutput.java:187)
at com.sun.faces.renderkit.html_basic.HtmlBasicInputRenderer.getValue(HtmlBasicInputRenderer.java:201)
at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.getCurrentValue(HtmlBasicRenderer.java:284)
at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeEnd(HtmlBasicRenderer.java:154)
at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:850)
at org.jboss.seam.ui.util.cdk.RendererBase.renderChild(RendererBase.java:190)
at org.jboss.seam.ui.util.cdk.RendererBase.renderChildren(RendererBase.java:166)
at
.....................................

Caused by: javax.el.ELException: //D:/app/eclipse/framework/PROJECT_SRC/TestWeb/WebRoot/register.xhtml @82,76 value="#{register.verify}": org.jboss.seam.RequiredException: @In attribute requires non-null value: register.user
at com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:76)
at javax.faces.component.UIOutput.getValue(UIOutput.java:184)

Looking at the error, it appear to me that there is either EL exception or injection error (no idea why though....)

web.xml:

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="2.4"
 xmlns="http://java.sun.com/xml/ns/j2ee"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
 <!-- Seam -->
 <listener>
 <listener-class>
 org.jboss.seam.servlet.SeamListener
 </listener-class>
 </listener>
 <listener>
 <listener-class>
 com.sun.faces.config.ConfigureListener
 </listener-class>
 </listener>

 <filter>
 <filter-name>Seam Filter</filter-name>
 <filter-class>org.jboss.seam.servlet.SeamFilter</filter-class>
 </filter>

 <filter-mapping>
 <filter-name>Seam Filter</filter-name>
 <url-pattern>/*</url-pattern>
 </filter-mapping>

 <servlet>
 <servlet-name>Seam Resource Servlet</servlet-name>
 <servlet-class>
 org.jboss.seam.servlet.SeamResourceServlet
 </servlet-class>
 </servlet>

 <servlet-mapping>
 <servlet-name>Seam Resource Servlet</servlet-name>
 <url-pattern>/seam/resource/*</url-pattern>
 </servlet-mapping>

 <context-param>
 <param-name>javax.faces.DEFAULT_SUFFIX</param-name>
 <param-value>.xhtml</param-value>
 </context-param>

 <context-param>
 <param-name>facelets.DEVELOPMENT</param-name>
 <param-value>true</param-value>
 </context-param>
 <context-param>
 <param-name>javax.faces.STATE_SAVING_METHOD</param-name>
 <param-value>client</param-value>
 </context-param>
 <context-param>
 <param-name>com.sun.faces.expressionFactory</param-name>
 <param-value>org.jboss.el.ExpressionFactoryImpl</param-value>
 </context-param>
 <!-- JSF -->

 <servlet>
 <servlet-name>Faces Servlet</servlet-name>
 <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
 <load-on-startup>1</load-on-startup>
 </servlet>

 <servlet-mapping>
 <servlet-name>Faces Servlet</servlet-name>
 <url-pattern>*.seam</url-pattern>
 </servlet-mapping>

 <session-config>
 <session-timeout>10</session-timeout>
 </session-config>

 <security-constraint>
 <display-name>Restrict raw XHTML Documents</display-name>
 <web-resource-collection>
 <web-resource-name>XHTML</web-resource-name>
 <url-pattern>*.xhtml</url-pattern>
 </web-resource-collection>
 <auth-constraint />
 </security-constraint>
</web-app>

Any help and idea is appreciated.

[nickarls]

Well, if its not auto-create it will be null the first time referenced. Add a create=true to the @In annotation.

[springfans]

"nickarls" wrote:
Well, if its not auto-create it will be null the first time referenced. Add a create=true to the @In annotation.

public class RegisterAction {
 @In(create=true )
 private User user;

2008-1-29 16:54:00 com.sun.facelets.FaceletViewHandler handleRenderException
严�: Error Rendering View[/register.xhtml]
javax.faces.FacesException: javax.el.ELException: //D:/app/eclipse/framework/PROJECT_SRC/TestWeb/WebRoot/register.xhtml @82,76 value="#{register.verify}": org.jboss.seam.RequiredException: @In attribute requires non-null value: register.user
 at javax.faces.component.UIOutput.getValue(UIOutput.java:187)
 at com.sun.faces.renderkit.html_basic.HtmlBasicInputRenderer.getValue(HtmlBasicInputRenderer.java:201)

[techieexchange]

Hi,
Normally if you get exception like

@In attribute requires non-null value

then its something wrong with your configuration.

Change the DEBUG level in your log4j.xml (or whatever you use) and check the complete log from application startup.

Also check whether you have seam.properties exists in WEB-INF/classes or jar file. If possible post components.xml too.

Hope this helps.

[svadu]

What is the declaration of User?