Backbone - rest POST service is called more than once - ajax

Question

I have a problem when I call a REST service by POST to updates tables in MySQL.
I'm working with BackboneJS and when click Save button, call the service and passed POST parameters
$.ajax({
type: 'POST',
url: rootURL,
data: dataJson, //data send to REST service by POST
cacheControl: "no-cache",
dataType: "json",
success: function(data){
console.log("OK");
},
error: function(data){
console.log(data.msg);
}
});
But the problem occurs when income and leave the editing screen. Assuming I made a change and it worked perfectly bringing me back a single "OK", when I go back into the editing screen and record again, I get twice the word "OK".
If I repeat this step to enter and exit the screen edition, duplicate responses are based on the number of times into the screen edition.
I don't know if it's a problem about I'm doing wrong with BackboneJS...?? I'm doing this:
editAdverts: function(){
var editAdvertsView = new EditAdvertsView ();
$('#container-page').append(editAdvertsView.render(idAdverts).el);
}
It can also be a topic of AJAX?
I hope someone can help me with this issue because I am not an expert in BackboneJS
Thanks a lot!
Diego

Answer 1

It's hard to tell without more code but I'm pretty sure it's because you are creating a model each time you are using editAdvert.
Instead of creating a model each time just create one at the init of your view then call the fetch/save function anytime you need an update. Creating the model once is enough.
edit: zombies views is a good thing to check too as brent noticed in comment, we can't tell without more code.

Answer 2

This is de code about route:
var Index = {
start: function() {
var list_view = new MainView();
}
};
var AppRouter = Backbone.Router.extend ({
routes: {
'goAdvert' : 'goAdvert'
},
goAdvert: function(){
var viewAdvertsView = new ViewAdvertsView();
$('#container-page').append(viewAdvertsView.render().el);
}
});
var MainView= Backbone.View.extend({
el: $('#contenedor-body'),
initialize: function() {
this.render();
},
render: function() {
// here is the code about main page. It's not important!
},
});
new AppRouter;
Index.start();
Backbone.history.start();
This is the viewAdvertsView.js
define([
'jquery',
'underscore',
'backbone',
'jqueryuniform',
'bootstrap',
'handlebars',
'jqueryDataTables',
'dtBootstrap',
'../../view/editAdvertsView',
], function($, _, Backbone, jqueryuniform, Bootstrap, Handlebars, JQueryDataTables, DtBootstrap, EditAdvertsView){
var viewAdverts = Backbone.View.extend({
events: {
'click #edit' : 'editAdvert'
}
editAdvert: function(){
$('#container-page').empty();
var idAdvert = $(event.target).data('id');
editAdvertView = new EditAdvertsView();
$('#container-page').append(editAdvertView.render(idAdvert).el);
},
render: function() {
// load viewAdverts
}
});
return viewAdverts;
}
);
And this is editAdvertsView.js
define([
'jquery',
'underscore',
'backbone',
'jqueryuniform',
'bootstrap',
'handlebars',
'jqueryDataTables',
'functions',
'sessionManage',
'slimscroll',
'jqueryCustomSlimscroll',
'slimscrollMin',
'jqueryblockui',
'text!../../html/editAdverts.html',
'maps',
'fancybox'
], function($, _, Backbone, jqueryuniform, Bootstrap, Handlebars, JQueryDataTables,
Functions, SessionManage, Slimscroll, JqueryCustomSlimscroll, SlimscrollMin,
Jqueryblockui, EditAdverts, Maps, Fancybox){
var Advert= Backbone.View.extend({
el: $('#container-page'),
events: {
'click #saveChanges' : 'doSaveChanges'
},
doSaveChanges: function(){
var data = null;
var rootURL = "http://localhost/php/slim/slim/advert/update" + "?date=" + $.now();
dataJson = {
id: $("#id").val(),
product: $("#product").val(),
price: $("#price").val(),
client: $("#client").val(),
country: $("#country").val(),
tel: $("#telephone").val(),
cel: $("#cellphone").val()
};
$.ajax({
type: 'POST',
url: rootURL,
data: dataJson,
cacheControl: "no-cache",
dataType: "json",
success: function(data){
console.log("OK");
error: function(data){
console.log(data.msg);
}
}
},
render: function(codInmueble) {
var self = this;
var editTemplate = Handlebars.compile(EditAdverts);
self.$el.html(editTemplate());
return this;
}
});
return Advert;
}
);