Struts2/Javascript: Action class cannot get property from jsp

[Mirko <id...@googlemail.com>]

Hi all,
I'm new to Struts and struggling with Struts2/Javascript.

I have a jsp website with a search form (textfield and submit button).  
Submitting the button calls the Struts action "SearchAction".  
"SearchAction" gets the property "searchInput" from the jsp website  
and does something with it. This works.

But now: I have some (Dojo-)Javascript on my jsp website from which I  
want to call the request. The Javascript (instead of the submit  
button) sends a HttpRequest to "SearchAction". I assumed that, like  
above, "SearchAction" could get the property "searchInput". But this  
does not work. "SearchAction is called, but the "searchInput" property  
is null. How would I manage that?

Thanks, Mirko

Search form on the jsp website:
<form id="searchForm" action="none" method="post">
<input type="text" id="searchInput" name="searchInput"></input>
<div dojoType="dijit.form.Button" type="submit">Search</div>
</form>

Request in the Dojo JavaScript:
this._xhr = dojo.xhrPost({
         		url: "./searchAction"
          		load: function(data){
             		  	// DO THINGS
             		}
               },
               error: function(error){
             	  // ERROR
               }
         	});


SearchAction class:
public class SearchAction extends ActionSupport  {

	public String execute() throws Exception {
		System.out.println(searchInput); //NULL
		return SUCCESS;
	}

	/* Properties */
	private String searchInput = null;

	public String getSearchInput() {
		return searchInput;
	}

	public void setSearchInput(String value) {
		searchInput = value;
	}



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Re: Struts2/Javascript: Action class cannot get property from jsp

[Mirko <id...@googlemail.com>]

Thanks Dave,
ok I did that and got it working. Although it's not clear to me why my  
first attempt doesn't work.

I read about the built-in ajax features. Not sure if they are  
approriate for my needs. Have to go into that more thoroughly, later.

Regards, Mirko


Am 24.06.2009 um 15:44 schrieb Dave Newton:

> Mirko wrote:
>> Hi all,
>> I'm new to Struts and struggling with Struts2/Javascript.
>> I have a jsp website with a search form (textfield and submit  
>> button). Submitting the button calls the Struts action  
>> "SearchAction". "SearchAction" gets the property "searchInput" from  
>> the jsp website and does something with it. This works.
>> But now: I have some (Dojo-)Javascript on my jsp website from which  
>> I want to call the request. The Javascript (instead of the submit  
>> button) sends a HttpRequest to "SearchAction". I assumed that, like  
>> above, "SearchAction" could get the property "searchInput". But  
>> this does not work. "SearchAction is called, but the "searchInput"  
>> property is null. How would I manage that?
>
> I'd assume that the dojo.xhrPost has some means of sending form  
> data: you need to serialize the form so the action gets the form  
> parameters.
>
> That said, depending on your actual needs, there's built-in support  
> for submitting a form via Ajax and updating a div with the action's  
> response.
>
> Dave
>
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> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
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Re: Struts2/Javascript: Action class cannot get property from jsp

[Dave Newton <ne...@yahoo.com>]

Mirko wrote:
> Hi all,
> I'm new to Struts and struggling with Struts2/Javascript.
> 
> I have a jsp website with a search form (textfield and submit button). 
> Submitting the button calls the Struts action "SearchAction". 
> "SearchAction" gets the property "searchInput" from the jsp website and 
> does something with it. This works.
> 
> But now: I have some (Dojo-)Javascript on my jsp website from which I 
> want to call the request. The Javascript (instead of the submit button) 
> sends a HttpRequest to "SearchAction". I assumed that, like above, 
> "SearchAction" could get the property "searchInput". But this does not 
> work. "SearchAction is called, but the "searchInput" property is null. 
> How would I manage that?

I'd assume that the dojo.xhrPost has some means of sending form data: 
you need to serialize the form so the action gets the form parameters.

That said, depending on your actual needs, there's built-in support for 
submitting a form via Ajax and updating a div with the action's response.

Dave

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