So far I think the client side is getting the correct response, both
with and without field errors (although I haven't plugged in the
automated processing of the field errors on the client side yet).
However, on the server side I'm seeing two exceptions (the other is for
the other property, "validateOnly"):
ognl.OgnlException: target is null for setProperty(null,
"enableJSONValidation", [Ljava.lang.String;@a4ed99)
at ognl.OgnlRuntime.setProperty(OgnlRuntime.java:1651)
at ognl.ASTProperty.setValueBody(ASTProperty.java:101)
at ognl.SimpleNode.evaluateSetValueBody(SimpleNode.java:177)
at ognl.SimpleNode.setValue(SimpleNode.java:246)
at ognl.ASTChain.setValueBody(ASTChain.java:172)
at ognl.SimpleNode.evaluateSetValueBody(SimpleNode.java:177)
at ognl.SimpleNode.setValue(SimpleNode.java:246)
at ognl.Ognl.setValue(Ognl.java:476)
at
com.opensymphony.xwork2.ognl.OgnlUtil.setValue(OgnlUtil.java:197)
at
com.opensymphony.xwork2.ognl.OgnlValueStack.setValue(OgnlValueStack.java
:150)
at
com.opensymphony.xwork2.ognl.OgnlValueStack.setValue(OgnlValueStack.java
:138)
at
com.opensymphony.xwork2.interceptor.ParametersInterceptor.setParameters(
ParametersInterceptor.java:205)
When examining the request parameters, the values for each of these is a
single element array with the value "true".
In Firebug, it shows the POST parameters as:
firstName joe
lastName blow
struts.enableJSONValidation true
As I said, despite these exceptions, the client side appears to be
getting the correct response, so the server side is clearly receiving
and setting the "enableJSONValidation" flag. I don't know what other
symptoms the exception might be causing. I don't see anything yet.
> -----Original Message-----
> From: Musachy Barroso [mailto:[EMAIL PROTECTED]
> Sent: Sunday, June 15, 2008 5:09 PM
> To: Struts Users Mailing List
> Subject: Re: Some confusion trying to do ajax form submit
>
> Take a look at this (2.1 only):
>
> http://struts.apache.org/2.0.11.1/docs/ajax-validation.html
>
> musachy
>
> On Sun, Jun 15, 2008 at 8:02 PM, Karr, David
> <[EMAIL PROTECTED]> wrote:
> > I have a simple page with validation that I got working with a
> > conventional submit and action.
> >
> > I'm now trying to explore doing an Ajax form submit, and getting a
> > JSON response. I'm using YUI on the client side. I'd like
> to see if
> > I can get similar data in the JSON response that I would in
> a normal
> > submit, for instance, with field errors.
> >
> > There are a couple points I could use some help with, not
> necessarily
> > related to Ajax or JSON. Please don't hesitate to tell me if I'm
> > doing something else wrong, or something I should be aware of.
> >
> > My first attempt actually did execute the Ajax request, and got the
> > response, but it wasn't JSON. The responseText was just
> the HTML of
> > my source JSP, which is also the value of my "input"
> result. I tried
> > setting up the JSON action without an "input" result, but
> it seemed to
> > complain if I didn't have that. I would have thought the "input"
> > parameter wouldn't be relevant in a Ajax/JSON action. If I
> filled in
> > all the required fields so it didn't result in any field
> errors, the
> > response was JSON, and it was reasonable (although setting
> > "wrapWithComments" didn't appear to have any effect). I
> guess there's
> > no automatic provision for reporting field errors in a JSON
> response,
> > so I guess I'll have to build something like that by hand?
> >
> > Note that I tried to enable the logging interceptor, but I
> didn't see
> > any output from it.
> >
> > I have a single action that I was intending to use to
> handle both the
> > ajax and non-ajax submit. I tried to make it use two
> different action
> > names in the form, but it seemed to have trouble with that.
> >
> > I noticed in the generated HTML, I had this in the HTML for the form
> > tag:
> >
> > onsubmit="return YAHOO.strutsform.submitform();;
> return true;"
> >
> > I'm not sure if that "return true;" will cause me trouble, as I'm
> > trying to bypass the normal form submission. I think by returning
> > false from "submitform", I achieved that, however.
> >
> > I'll include here the relevant files. Please comment where
> appropriate.
> > Thanks for your input.
> > ---form.jsp------------
> > <%@ page language="java" contentType="text/html; charset=UTF-8"
> > pageEncoding="UTF-8"%>
> > <%@ taglib prefix="s" uri="/struts-tags" %> <!DOCTYPE html PUBLIC
> > "-//W3C//DTD HTML 4.01 Transitional//EN"
> > "http://www.w3.org/TR/html4/loose.dtd";>
> > <html>
> > <head>
> > <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
> > <title>Struts Form</title> <link rel="stylesheet"
> >
> href="${pageContext.request.contextPath}/struts/css_xhtml/styles.css"
> > type="text/css">
> > <link rel="stylesheet" type="text/css"
> > href="${pageContext.request.contextPath}/style/form.css">
> > <!-- css -->
> > <link rel="stylesheet" type="text/css"
> >
> href="${pageContext.request.contextPath}/yui/reset-fonts-grids/reset-f
> > on
> > ts-grids.css">
> > <link rel="stylesheet" type="text/css"
> >
> href="${pageContext.request.contextPath}/yui/button/assets/skins/sam/b
> > ut
> > ton.css">
> > <link rel="stylesheet" type="text/css"
> >
> href="${pageContext.request.contextPath}/yui/logger/assets/skins/sam/l
> > og
> > ger.css">
> > <!-- js -->
> > <script type="text/javascript"
> >
> src="${pageContext.request.contextPath}/yui/utilities/utilities.js"></
> > sc
> > ript>
> > <script type="text/javascript"
> >
> src="${pageContext.request.contextPath}/yui/button/button-debug.js"></
> > sc
> > ript>
> > <script type="text/javascript"
> >
> src="${pageContext.request.contextPath}/yui/json/json-debug.js"></scri
> > pt
> >>
> > <script type="text/javascript"
> >
> src="${pageContext.request.contextPath}/yui/logger/logger-debug.js"></
> > sc
> > ript>
> > <script type="text/javascript"
> >
> src="${pageContext.request.contextPath}/scripts/strutsform.js"></scrip
> > t>
> > </head>
> > <body class="yui-skin-sam">
> > <h4>Enter your data</h4>
> > <!-- onsubmit="return YAHOO.strutsform.submitform();" -->
> > <s:form id="form" action="Form" onsubmit="return
> > YAHOO.strutsform.submitform();">
> > <s:textfield name="lastName" label="Last Name"/>
> > <s:textfield name="firstName" label="First Name"/>
> > <button id="formsubmit" type="submit">Submit</button>
> > </s:form>
> > <script type="text/javascript">
> > YAHOO.util.Event.onDOMReady(YAHOO.strutsform.init);
> > </script >
> > </body>
> > </html>
> > ---------------
> > ---struts.xml------------
> > <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE struts PUBLIC
> > "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
> > "struts-2.0.dtd" > <struts>
> > <constant name="struts.devMode" value="true" />
> > <package extends="struts-default" name="main" namespace="/main">
> > <action name="main">
> > <result>/form.jsp</result>
> > </action>
> > <action name="Form" class="com.wamu.strutsform.FormAction">
> > <result name="input">/form.jsp</result>
> > <result>/form.jsp</result>
> > </action>
> > </package>
> >
> > <package extends="json-default" name="json" namespace="/json">
> > <action name="Form" class="com.wamu.strutsform.FormAction"
> > method="jsonSubmit">
> > <interceptor-ref name="logger"></interceptor-ref>
> > <interceptor-ref name="completeStack"></interceptor-ref>
> > <result type="json">
> > <param name="wrapWithComments">true</param>
> > </result>
> > <result name="input">/form.jsp</result>
> > </action>
> > </package>
> > </struts>
> > ---------------
> > ---FormAction.java------------
> > package com.wamu.strutsform;
> > import org.apache.commons.logging.Log; import
> > org.apache.commons.logging.LogFactory;
> > import com.opensymphony.xwork2.ActionSupport;
> >
> > public class FormAction extends ActionSupport {
> > private static final Log logger =
> > LogFactory.getLog(FormAction.class);
> >
> > private String lastName;
> > private String firstName;
> >
> > public String getLastName() { return lastName; }
> > public String getFirstName() { return firstName; }
> >
> > public void setLastName(String lastName)
> > { this.lastName = lastName; }
> > public void setFirstName(String firstName)
> > { this.firstName = firstName; }
> >
> > public String execute()
> > {
> > logger.info("execute.");
> > return SUCCESS;
> > }
> >
> > public String jsonSubmit()
> > {
> > logger.info("jsonSubmit.");
> > return SUCCESS;
> > }
> > }
> > ---------------
> > ---strutsform.js------------
> > /**
> > * @author u166705
> > */
> > YAHOO.namespace("strutsform");
> >
> > YAHOO.widget.Logger.enableBrowserConsole();
> >
> > var $E = YAHOO.util.Event;
> > var $D = YAHOO.util.Dom;
> >
> > YAHOO.strutsform.init =
> > function ()
> > {
> > $E.onContentReady("formsubmit", function()
> > {
> > var submitButton = new
> YAHOO.widget.Button("formsubmit");
> > });
> > };
> >
> > YAHOO.strutsform.submitform =
> > function()
> > {
> > var callback =
> > {
> > success: function(obj)
> > {
> > YAHOO.log("obj.responsetext[" +
> obj.responseText + "]");
> > },
> > failure: function(obj)
> > {
> > YAHOO.log("obj.responseText[" +
> obj.responseText + "]");
> > }
> > };
> > YAHOO.util.Connect.setForm(document.getElementById("form"));
> > YAHOO.util.Connect.asyncRequest("POST",
> > "/strutsform/json/Form.action",
> > callback, null);
> > return false;
> > };
> > ---------------
> >
> >
>
>
>
> --
> "Hey you! Would you help me to carry the stone?" Pink Floyd
>
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