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Backbone.js + Django
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Leah Culver
October 06, 2011
Programming
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Backbone.js + Django
Leah Culver
October 06, 2011
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Transcript
Backbone.js + Django Leah Culver PyCodeConf 2011
Convore topic-based chat on the web
None
Leafy Chat web-based IRC client
None
Grove IRC for your company
None
chat UI
Leafy Chat - pure JavaScript
$('#message-form-sender').submit(Leafy.sendMessage)
sendMessage: function(e) { var msg = $('#message').val() var row =
'<span>' + currentUser + ':</span> ' + msg row = row + '<span class="ts">' + ts + '</span>' $(Leafy.channelID(channel)).append(row) Kahlan.say(Leafy.currentChannel, msg) },
this.socket = new Orbited.TCPSocket say: function(channel, msg) { var data
= {to: channel, type: 'privmsg', body: msg} this.socket.send(JSON.stringify(data) + "\r\n") },
1. handle form submit 2. create new message 3. display
message in list 4. POST message via AJAX
Grove grove.io/app
None
backbone.js
MVC
MVC MTV
Model
window.Message = Backbone.Model.extend ({ });
Collection
window.MessageCollection = Backbone.Collection.extend ({ model: Message, });
Views
None
None
None
1. handle form submit
window.MessageFormView = Backbone.View.extend ({ events: { 'submit form': 'submitForm', },
});
2. create new message
submitForm: function() { var msg = $('#message).val(); var message =
new Message ({ 'message': msg, });
3. display message in list
currentChannel.messages.add(message);
window.MessageListView = Backbone.View.extend({ model: MessageCollection, initialize: function() { this.model.bind('add', this.addMessage);
this.model.bind('change', this.render); this.model.bind('remove', this.removeMessage); },
4. POST message via AJAX
currentChannel.messages.create({'message': msg}, { success: function(model, response) { message.set(model.attributes, { silent:
true }); }, error: function(model, error) { currentChannel.messages.remove(message); $('#message').val(msg); } });
Templates
<script id="msg-template" type="text/x-handlebars-template"> <span>{{user.username}}</span>: {{message}} <span class="ts">{{timestamp date_created}}</span> </script>
Handlebars.js
template: Handlebars.compile($('#msg-template').html())
{% include_raw "message.html" %} djangosnippets.org/snippets/1684
additional goodies
Sync
url: function() { return this.channel.url() + '/messages/'; },
url(r'^app/channels/(?P<channel_id>\d+)/messages/$', 'channel_messages'),
if request.method == 'POST': json_data = simplejson.loads(request.raw_post_data) message = Message.objects.create(
message=json_data.get('message'), ... ) return JSONResponse(request, message.data())
https://gist.github.com/1265346
Events
App.trigger('messageAdded', channel);
initialize: function() { App.bind('messageAdded', this.messageAdded); }, messageAdded: function(channel) { //
Do something... }
Router
var MainRouter = Backbone.Router.extend({ routes: { 'app/join': 'join', 'app/:name': 'channel'
}, join: function() { var joinPageView = new JoinPageView(); return joinPageView.loadPage(); }, });
Questions?
Photos http://www.flickr.com/photos/coldtaxi/426162862/ http://www.flickr.com/photos/aliaholle/5888906660/ http://www.flickr.com/photos/joshmaz/5248178452/ http://www.flickr.com/photos/1stpix_diecast_dioramas/5934583890/ http://www.flickr.com/photos/hamed/429069420/ http://www.flickr.com/photos/ittybittiesforyou/4942706804/ http://www.flickr.com/photos/krhamm/171302278/ http://www.flickr.com/photos/vinothchandar/5148046888/ http://www.flickr.com/photos/jliba/4437937329/
http://www.flickr.com/photos/seier/2034873075/ http://www.flickr.com/photos/31246066@N04/5115966185/sizes http://thefilmstage.com/news/zoolander-2-in-limbo-at-paramount/ http://www.flickr.com/photos/byebyeempire/323372590/ http://www.flickr.com/photos/shakethesky/4104894504/ http://www.flickr.com/photos/litlnemo/3296421032/ http://www.flickr.com/photos/qusic/3370510628/