CODEWITHSUNDEEP
javajsonvalidationstruts2liferay
Sri
Sri

Reputation: 1217

How to return ActionErrors, FieldErrors as JSON and display errors on the form using AJAX

I am wondering if anybody can throw any ideas on the following.

Got an Action class with validate() method returning JSP input result with actionErrors, fieldErrors when validations fail.

I would like to get only the validation errors (JSON data?) and display the errors on the existing page and highlight the fields, rather than refreshing a whole JSP with the new response JSP.

JQuery is used on client side, Struts 2 as MVC framework, Liferay as Portal server.

The following is the code that I tried:

public void validate() { 
    setActionErrors(validateData(this));
}

struts.xml:

<result-types>
        <result-type name="json" class="org.apache.struts2.json.JSONResult"/>
</result-types>
    
<interceptors>
    <interceptor name="json" class="org.apache.struts2.json.JSONInterceptor"/>
</interceptors>             


<action name="saveDataAsync" class="MyActionClass" method="addDataAsync">
    <result name="success">/jsp/addDataAsync.jsp</result>
    <result name="input" type="json">
    </result>
</action>

JSP:

<portlet:actionURL name="saveData" var="saveDataActionURL">
   <portlet:param name="struts.portlet.action" value="/saveDataAsync"/>
</portlet:actionURL>

JS:

jQuery.ajax({
            type: 'POST',
            url: "<%=saveDataActionURL%>", 
            data: jQuery("#form").serialize(),
            dataType: 'json',
            success: function(data) {
            
                alert("data" + data);
            }
});

After execution of validate() method, the flow is executing a default method of action class, even when there are errors added to errorlist, and set through setActionErrors() method. I could see resultcode: as "input" and result: as "jsonresult" when the interceptors and invoke() methods get called.

I really appreciate any help on this problem.

Upvotes: 0

Views: 1772

Answers (1)

Roman C
Roman C

Reputation: 1

You can configure INPUT result to your action of type json and use includeProperties parameter to specify generated JSON.

<result name="input" type="json">
  <param name="ignoreHierarchy">false</param>
  <param name="includeProperties">^actionErrors\[\d+\],^fieldErrors\['\w+'\]\[\d+\]</param>
</result>

The action class should extend ActionSupport, so these properties will be available.

Upvotes: 1

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