How to unbind all the socket.io events from my backbone view? - backbone.js

Question

I have a page which include two backbone views (views related to two template). I am changing content of one views based on clicking event on different items on another view. For this, Every time I click on any items in one view I just create a instance of another view which include some socket.io events. At the first time It's work well but everytime I click on item on first view it just create the instance of 2nd one so that all the socket.io events is binding. Except first click every time I click on items on first view and call an socket.io events, it fired more than one time based on how many click I have done to different items.
I know that every time I click an items it create an instance of a view with socket.io event bind. But I can not get the way to unbind the previous socket.io events.
I have tried to use this reference:
Backbone.js View removing and unbinding
But it is not working in my case. May be I did not use it in proper way.
Can anyone please give me a solution or way to unbind all the socket.io events binded before?
Here is my Clicking event from where I am creating a new instance of another view where all the socket.io events binds.
LoadQueueDetails: function (e) {
e.preventDefault();
var queues = new Queues();
queues.fetch({
data: $.param({ Code: this.model.get("QueueCode") }),
success: function () {
$("#grid21").html(new SearchResultListView({ collection: queues }).el);
},
error: function (queues) {
alert('error found in fetch queue details');
}
});
}
And here is my actual view where I bind all the socket.io events.
window.SearchResultListView = Backbone.View.extend({
initialize: function () {
this.collection.on('change', this.render, this);
this.render();
},
render: function () {
var Queues = this.collection;
var len = Queues.length;
$(this.el).html(this.template());
for (var i = 0; i < len; i++) {
$('.QueueListItem', this.el).append(new SearchResultListItemView({ model: Queues.models[i]}).render().el);
}
return this;
}
});
window.SearchResultListItemView = MainView.extend({
tagName: "tr",
initialize: function () {
this.__initialize();
var user;
if ($.super_cookie().check("user_cookie")) {
this.user = $.super_cookie().read_JSON("user_cookie");
}
this.model.bind("change", this.render, this);
this.model.on("destroy", this.close, this);
socket.emit('adduser', this.user.UserName, this.model.get("Code"));
},
events: {
"click a": "JoinQueue"
},
onClose: function(){
this.model.unbind("change", this.render);
},
close: function () {
this.remove();
this.unbind();
this.model.unbind("change", this.render);
},
socket_events: {
"updatechat": "updatechat",
"changeroom": "changedroom"
},
changedroom: function (username, data) {
alert(data);
socket.emit('switchRoom', data);
},
updatechat: function (username, data) {
alert(username);
alert(data);
},
JoinQueue: function (e) {
e.preventDefault();
if ($.super_cookie().check("user_cookie")) {
user = $.super_cookie().read_JSON("user_cookie");
}
socket.emit('sendchat', "new user");
},
render: function () {
var data = this.model.toJSON();
_.extend(data, this.attributes);
$(this.el).html(this.template(data));
return this;
}
});
window.Queue = Backbone.Model.extend({
urlRoot: "/queue",
initialize: function () {
},
defaults: {
_id:null,
Code: null,
ServiceEntityId: null,
ServiceEntityName:null,
Name: null,
NoOfWaiting: null,
ExpectedTimeOfService: null,
Status: null,
SmsCode: null
}
});
window.Queues = Backbone.Collection.extend({
model: Queue,
url: "/queue",
initialize: function () {
}
});
Backbone.View.prototype.close = function () {
this.remove();
this.unbind();
if (this.onClose) {
this.onClose();
}
}
And this is my main view to bind socket.io event in searchResultItemview.
var MainView = Backbone.View.extend({
initialize: function () {
this.__initialize();
},
__initialize: function () {
if (this.socket_events && _.size(this.socket_events) > 0) {
this.delegateSocketEvents(this.socket_events);
}
},
delegateSocketEvents: function (events) {
for (var key in events) {
var method = events[key];
if (!_.isFunction(method)) {
method = this[events[key]];
}
if (!method) {
throw new Error('Method "' + events[key] + '" does not exist');
}
method = _.bind(method, this);
socket.on(key, method);
};
}
});
For extra information:
1. I am opening socket connection globally. Like this :
var socket = io.connect('http://localhost:3000');
I am waiting for any kind of advice or solution to get out of this problem. Please feel free to ask any kind of inquiries.

Answer 1

Basically you have to do socket.removeListener for every socket.on when you close your View.
You can update your MainView and add a close method.
This is how it looks in my code (CoffeeScript)
close: ->
self = #
_.each #socket_events, (method, key) ->
method = self[self.socket_events[key]]
socket.removeListener key, method