I just noticed a mistake I made. When adding the parameter to the result I also
have to add a getJsonData() method to the action, right?
I have added this method which actually calls execute(). Now I don't get "null"
as a result anymore but I get "success" which is also not what I expected.
I guess I have missed something. Since this is the first time I use struts, I
have no idea what I did wrong. Any hints are appreciated.
Cheers,
Markus
-------- Original-Nachricht --------
> Datum: Tue, 27 Oct 2009 16:09:25 +0100
> Von: "Michael Varlik" <m.var...@gmx.de>
> An: "Struts Users Mailing List" <user@struts.apache.org>,
> user@struts.apache.org
> Betreff: Re: RE: Adding Json to existing action
> Thanks for that hint. I have extended my mapping by adding "<param
> name=root>jsonData</param>" to my action mapping's result tag. Now I don't
> get any
> Exception and the server log looks just fine. However, the value returned
> by the action is just "null".
> Do you have any idea what could be wrong here?
>
> Cheers,
> Markus
>
> -------- Original-Nachricht --------
> > Datum: Tue, 27 Oct 2009 09:39:01 -0400
> > Von: "Mike Baranski" <list-subscripti...@secmgmt.com>
> > An: "\'Struts Users Mailing List\'" <user@struts.apache.org>
> > Betreff: RE: Adding Json to existing action
>
> > I do this to pass parameters, using prototype js:
> >
> > <s:set name="foo" value="%{'door' + door.id}"/>
> > <s:set name="form_name" value="%{'form_door' + door.id}"/>
> >
> > <s:set name="door_description" value="getText(#foo)"/>
> > <s:if test="door.state == 1">
> > <s:url id="door_url" action="unlock"><s:param name="door.id"
> > value="door.id"/></s:url>
> > <s:form method="POST" action="unlock" id="%{#form_name}"
> > onsubmit="return false;">
> > <s:hidden name="door.id"/>
> > <s:hidden name="door.state"/>
> > <s:url var="locked_image"
> > value="/pages/door-control/images/locked.png" />
> > <s:submit type="image" alt="Locked"
> > src="%{locked_image}" onclick="%{'new Ajax.Updater(\\'' + #foo +'\\',
> \\''
> > +
> > #door_url + '\\', {evalScripts: true}); return false;'}"/>
> > </s:form>
> >
> > </s:if>
> >
> > >-----Original Message-----
> > >From: Struts Two [mailto:struts...@yahoo.ca]
> > >Sent: Tuesday, October 27, 2009 9:24 AM
> > >To: Struts Users Mailing List
> > >Subject: Re: Adding Json to existing action
> > >
> > >You can either use Json plugin or write your own customized result type
> > >that return JSON.
> > >
> > >--- On Tue, 10/27/09, Michael Varlik <m.var...@gmx.de> wrote:
> > >
> > >> From: Michael Varlik <m.var...@gmx.de>
> > >> Subject: Adding Json to existing action
> > >> To: user@struts.apache.org
> > >> Received: Tuesday, October 27, 2009, 1:07 PM
> > >> Hi,
> > >>
> > >> I need to call an existing struts action within my
> > >> application from a
> > >> JavaScript function. I thought it might be possible to
> > >> create an additional entry in the struts mapping file like
> > >> this:
> > >>
> > >> <action name="getDataJson"
> > >> class="com.mypackage.MyAction" method="getData">
> > >> <result type="json" />
> > >> </action>
> > >>
> > >> and then call the action with "getDataJson.action".
> > >> Unfortunately, when I try this a NullPointerException
> > >> occurs in the action code. It seems, some parameters are not
> > >> properly initialized.
> > >>
> > >> What I'd like to know is: what is the recommendet way of
> > >> calling an existing action to get JSON results? Is it a good
> > >> idea to do this at all?
> > >>
> > >> Cheers,
> > >> Markus
> > >> --
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> > >>
> > >
> > >
> > >
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