form submit doesn't callback - extjs

Question

I have a form with standard submit.
var formDettaglio = new Ext.form.FormPanel({
title: 'Dettaglio richiesta',
renderTo: 'divDettaglio',
url: '/supporto/gestioneDettaglio',
standardSubmit: true,
width: '100%',
forceFit: true,
layout: {
type: 'vbox',
align: 'stretch'
},
defaults: {
border: false
},
margin: '0 0 15 0',
items: [{
layout: {
type: 'hbox',
align: 'stretch'
},
margin: '0 10 5 10',
items: [{
xtype: 'combo',
fieldLabel: 'Prodotto/Servizio',
labelWidth: 100,
width: 450,
queryMode: 'local',
name: 'cbAssets',
store: storeAssets,
displayField: 'valore',
valueField: 'codice'
}, {
flex: 1,
xtype: 'label',
text: ' '
}, {
xtype: 'textfield',
fieldLabel: 'Data chiusura prev.',
labelAlign: 'right',
labelWidth: 120,
width: 250,
name: 'textDataPrevista',
readOnly: true
}, {
xtype: 'textfield',
fieldLabel: 'Stato',
labelAlign: 'right',
labelWidth: 50,
width: 150,
name: 'textStato'
}
]
}, {
xtype: 'textarea',
fieldLabel: 'Motivo richiesta',
labelWidth: 100,
height: 150,
margin: '0 10 5 10',
name: 'textMotivo'
}
],
dockedItems: [{
xtype: 'toolbar',
padding: '2 0 2 0',
dock: 'bottom',
ui: 'footer',
items: [{
xtype: 'tbfill'
}, {
xtype: 'button',
text: 'Salva',
style: "width:100px; height:25px;",
handler: function () {
if (formDettaglio.getForm().isValid()) {
formDettaglio.getForm().submit({
params: {
azione: 'SALVA'
},
success: function (form, action) {
alert('ok');
},
failure: function (form, action) {
alert('ko');
}
});
} else {
alert('Errore!');
}
}]
}]
});
My called function, /supporto/gestioneDettaglio, send a json response
{"success":true}
But my success function doesn't start. I tried also with breakpoint on firebug: no way.
I get back an empty page with exactly the phrase... {"success":true}
What am I doing wrong? I send JSON like any other response in my application.

Answer 1

You have standardSubmit set to true. If you want to do an ajax submission with the callback functionality you need to set the standardSubmit property to false.

Answer 2

Solved with "standardSubmit:false"
On submit click, I called
Ext.Ajax.request({ url: '/supporto/gestioneDettaglio',
params: {azione: 'SALVA'},
jsonData: { },
form: 'formDettaglio',
method:'POST',
success: function(response, opts) { alert("successfull"); },
failure:function(res,opt) { alert("request failed"); }
});
I don't understand why the Ajax request, without "jsonData: { },", didn't pass parameters... But it's ok.
Thanks!