Backbone.Marionette - view is not rendering properly - javascript

I am doing a sample work to render the element using the data. but I am not getting my result. what is wrong here?
any one help me?
here is my code: please go for fiddle for the live demo.
html:
<div id="content" class="content"></div>
<script type="text/template" id="list">
<%= name %>
</script>
Javascript:
var data = [
{"name":"name1","city":"city1","age":"age1","subModel":[
{"name":"name01","city":"city01","age":"age01","subModel":[
{"name":"name001","city":"city001","age":"age001"}
]},
{"name":"name02","city":"city02","age":"age02","subModel":[
{"name":"name002","city":"city002","age":"age002"}
]},
{"name":"name03","city":"city03","age":"age03","subModel":[
{"name":"name003","city":"city003","age":"age003"}
]}
]}
];
var myApp = new Backbone.Marionette.Application();
myApp.addRegions({
mainRegion:"#content"
});
var myModel = Backbone.Model.extend({
defaults:{
"name":"no name",
"city":"chennai",
"age":"10 months"
}
});
var myCollection = Backbone.Collection.extend({
model:myModel
});
var oneView = Backbone.Marionette.ItemView.extend({
tagName:"li",
template:"#list"
});
var multiView = Backbone.Marionette.CompositeView.extend({
tagName:'ul',
itemView:oneView
});
myApp.on('initialize:after', function(){
var listView = new multiView({collection:data});
myApp.mainRegion.show(listView);
});
myApp.start();
Live Demo

Here you go: http://jsfiddle.net/Cardiff/Y5kwM/
There are several errors here:
var multiView = Backbone.Marionette.CompositeView.extend({
tagName:'ul',
itemView:oneView
});
You need to provide a template to a compositeView, otherwise use a collectionview.
var listView = new multiView({collection:data});
You can't just set an array as a collection. You need a valid backbone collection (see fiddle).

Related

how to load html file in Marionette .js + backbone?

I have one "test.html" in that I have this contend (whole html file have this contend).
<h1>First page</h1>
I need to load that contend in my div having id ="contend" using Marionette .js
<div id="contend">
</div>
could you please tell me how I will do that ?
fiddle :
http://jsfiddle.net/JQu5Q/16/
$(document).ready(function(){
var ContactManager = new Marionette.Application();
ContactManager.addRegions({
mainRegion:"#contend"
})
ContactManager.on("start", function(){
console.log("ContactManager has started!");
});
ContactManager.start();
// router
var routers = Backbone.Router.extend({
routes: {
"": "showFirstPage"
},
showFirstPage:function(){
}
})
var ToolItemView = Backbone.Marionette.ItemView.extend({
template: '<div>hello</div>',
});
})
If you want to show the view by Backbone.router, you just need to pass the Marionette app to router than show it.
var routers = new Router({app: ContactManager})
demo
Instantiate the view, and show it in the region:
var toolItemview = new ToolItemView();
ContactManager.mainRegion.show(toolItemview);
http://jsfiddle.net/JQu5Q/17/

Backbone - View not rendering

I'm new to backbone and trying to make a book library app. While running this code, it is not showing the template.
This is my index.html
<html>
<head>
<title>Example</title>
</head>
<body>
<form>
Name:<input type='text' id='name'/><br>
Author:<input type='text' id='auth'/><br>
Keyword:<input type='text' id='keyword'/><br><br>
<button id="add">Add</button>
</form>
<div id='book_list'>
</div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.0.1/jquery.min.js"></script>
<script src="http://documentcloud.github.com/underscore/underscore-min.js"></script>
<script src="http://documentcloud.github.io/backbone/backbone-min.js"></script>
<script src="script.js"></script>
<script id="bookTemplate" type="text/template">
<ul>
<li><%= name %></li>
<li><%= auth %></li>
<li><%= keyword %></li>
</ul>
<button class="delete">Delete</button>
</script>
</body>
</html>
This is script.js
$(function(){
var bookmodel = Backbone.Model.extend({
defaults: {
name:'temp',
auth:'meee',
keyword:'nonee'
},
});
var booklist = Backbone.Collection.extend({
model:bookmodel
});
var bookview= Backbone.View.extend({
tagName:'div',
className: 'bookContainer',
template: _.template( $('#bookTemplate').html()),
events:{
'click .delete':'deleteBook'
},
render : function(){
this.$el.html(this.template(this.model.toJSON()));
return this;
},
deleteBook: function(){
this.model.destroy();
this.remove();
}
});
var library = Backbone.View.extend({
model: bookmodel,
initialize: function( initialBooks ) {
$el='#book_list';
var one=new bookmodel({name:'ankur 1',auth:'asdf 1',keyword:'asdfkasdf 1'});
var two=new bookmodel({name:'ankur 2',auth:'asdf 2',keyword:'asdfkasdf 2'});
var bookcoll= [one,two];
this.collection = new booklist(bookcoll);
this.render();
},
render:function(){
this.collection.each(function (item){
var k= new bookview({model:item});
this.$el.append(k.render().el);
},this);
},
});
var xyz= new library();
})
Also, when i'm trying to code like this:
var library = Backbone.View.extend({
model: bookmodel,
$el:'#book_list';
..... //rest of the code
)};
var xyz= new library();
Then,it is leading to : Uncaught TypeError: undefined is not a function, at line
var xyz= new library();
I ran your code and it seemed fine. I dont know exactly whats in script.js but try including your template above your script.js file. It probably can't find your template at the point it was running
I was able to recreate your error in jsfiddle by using their underscore library backbone loader. It wasn't an issue with your code. The following fiddle shows your same error:
http://jsfiddle.net/32tsA/
While this one works fine:
http://jsfiddle.net/BympL/
The issue was with how you had the fiddle set up in my estimation.
I did make some minor changes to fix up capitalization and some best practices with Backbone:
var Bookmodel = Backbone.Model.extend({
defaults: {
name:'temp',
auth:'meee',
keyword:'nonee'
}
});
var Booklist = Backbone.Collection.extend({
model: Bookmodel
});
var Bookview = Backbone.View.extend({
tagName:'div',
className: 'bookContainer',
template: _.template( $('#bookTemplate').html()),
events:{
'click .delete':'deleteBook'
},
render : function(){
this.$el.html(this.template(this.model.toJSON()));
return this;
},
deleteBook: function(){
this.model.destroy();
this.remove();
}
});
var one=new Bookmodel({name:'ankur 1',auth:'asdf 1',keyword:'asdfkasdf 1'});
var two=new Bookmodel({name:'ankur 2',auth:'asdf 2',keyword:'asdfkasdf 2'});
var bookcoll = [one,two];
var mybooks = new Booklist(bookcoll);
var Library = Backbone.View.extend({
render:function(){
this.collection.each(function (item){
var k= new Bookview({model:item});
this.$el.append(k.render().el);
},this);
},
});
var xyz = new Library({collection: mybooks, el: "#book_list"});
xyz.render();
I named the classes with capital case, removed the initialization of the models from your view (views should be told their models not create their models), and abstracted the el declaration from the Library declaration (so you can reuse the view in a different place).

How to fetch data from Backbone collection to Template

i am just writing a simple backbone program. But i am not getting how to fetch data from backbone collection to backbone template. Complete code is written below:
<!doctype html>
<html>
<head>
<title>Backbone tutorial</title>
</head>
<body>
<div class="user">user</div>
<div class="page"></div>
<script type="text/template" id="user-list-template">
I am not able to get data on daya.key
<h1> <%= data.key %> </h1>
</script>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="underscore.js"></script>
<script type="text/javascript" src="backbone.js"></script>
<script>
This is my Collection code
var Album = Backbone.Collection.extend({
url : "/data.json"
});
This is my view code
var UserList= Backbone.View.extend({
el:'.page',
template:_.template($('#user-list-template').html()),
render : function(){
var that=this;
var album= new Album();
album.fetch({
success:function(album){
var _data = {data : album.models} ;
$(that.el).html(that.template(_data));
}
})
}
});
This is my Router code
var Router = Backbone.Router.extend({
routes: {
"": "home" // #help
}
});
var userList= new UserList();
var router = new Router();
router.on('route:home', function(){
userList.render();
});
Backbone.history.start();
</script>
</body>
</html>
and here is the data.json file
{ "key" : "value to print on template "}
Two modifications i would suggest
1.First check the data feild in your template. Since you are fetching data from the collection it will be array of models.
<h1> <%= data[0].key %> </h1>
or you can use a for loop iterating over the collections
2.The data.json file should look like this
[{"key" : "value"}]
Server needs to return a JSON array of model object for collection.fetch() request. So the data.json should look like this:
[{"key":"value to print on template"},{"key":"another value"}]
And try this collection view render implementation:
Model:
var User = new Backbone.Model.extend({});
Collection:
var Album = new Backbone.Collection.extend({
model: User,
url: "/data.json"
});
//create collection instance
var album = new Album();
View:
var UserList= Backbone.View.extend({
el:'.page',
template:_.template($('#user-list-template').html()),
initialize: function(){
//register a collection data add event handler
this.listenTo(album,"add",this.addUser);
//register a collection data remove event handler
this.listenTo(album,"remove",this.removeUser);
album.fetch();
},
render : function(){
},
addUser: function(user){ //apply model data to view template and append to view element
this.$el.append(this.template(user.toJSON()));
},
removeUser: function(user){
//view state update implementation when data have been removed from collection
}
});
Template:
<script type="text/template" id="user-list-template">
<h1><%= key %></h1>
</script>
div.user view will add/remove user-list view dynamically according to collection data manipulation.
Hope this helpful.

Backbone View not rendering after fetch is successful

I'm new to Backbone and trying to put together a small app and having problems getting a view to render client side.
Here is my client html in jade.
extends layout
block content
.row
#breadcrumbs.span12
script#room-list-template(type="text/template")
<td><%=name%></td>
<td><button class="btn btn-info">Join Room</button></td>
script(src="/javascripts/dislocated_poker/index.js").
script(src="/javascripts/dislocated_poker/nav.js").
script(src="/javascripts/dislocated_poker/room.js").
script(type="text/javascript").
$(function(){
DislocatedPoker.init();
})
This call my init function to fetch the data which is stashed away in MongoDb
DislocatedPoker = {
init : function() {
var crumbView = new DislocatedPoker.BreadcrumbView({el : "#breadcrumbs"});
crumbView.render();
var rooms = new DislocatedPoker.Rooms();
var roomListView = new DislocatedPoker.RoomListView({collection : rooms});
rooms.fetch();
}
};
And here are my views and models.
DislocatedPoker.Room = Backbone.Model.extend({
});
DislocatedPoker.Rooms = Backbone.Collection.extend({
model : DislocatedPoker.Room,
url : "/api/rooms"
});
DislocatedPoker.RoomView = Backbone.View.extend({
tagName : "tr",
render : function() {
var template = $("#room-list-template").html();
var compiled = _.template(template, this.model.toJSON());
$(this.el).html(compiled);
return this;
}
})
DislocatedPoker.RoomListView = Backbone.View.extend({
initialize : function() {
this.collection.bind("reset", this.render, this);
this.collection.bind("add", this.render, this);
},
tagName : "table",
className : "table table-striped",
render : function() {
var els = [];
this.collection.each(function(item) {
var itemView = new DislocatedPoker.RoomView({model : item});
els.push(itemView.render().el);
})
//return this;
$(this.el).html(els);
$("#room-list").html(this.el);
}
})
I see JSON being returned from the fetch() method and the collection is iterated, but the result never ends up as client html. If I view the source of the HTML I see the following where the template should render.
<script id="room-list-template" type="text/template"><td><%=name%></td>
<td><button class="btn btn-info">Join Room</button></td>
I feel like I am missing something pretty obvious but can't seem to pinpoint the issue.
Any guidance is much appreciated.
Thanks.
It looks like the following won't work:
$(this.el).html(els);
jQuery's html function takes a string, you're providing an array. Try with:
$(this.el).html(els.join(""));
You should try the following:
this.collection.bind("fetched", this.render, this);

backbone collection. fetch() not rendering the view in mozilla

i am trying to learn backbone.js ( Backbone.js 1.0.0) this is my sample html page where iam using collection. fetch() method to get the collection,and it is displayed using view .i am getting result in
google chrome,but nothing is displayed in mozilla. i don't know the exact reason.
while i refere to backone site http://backbonejs.org/#Collection-fetch
it is qouted that :
Note that fetch should not be used to populate collections on page load — all models needed at load time should already be bootstrapped in to place. fetch is intended for lazily-loading models for interfaces that are not needed immediately: for example, documents with collections of notes that may be toggled open and closed.
is this is related with my issue?
this is my sample html page
<!DOCTYPE html>
<html>
<head>
<title>Backbone Application</title>
<script src="js/jquery.js" type="text/javascript"></script>
<script src="js/underscore.js" type="text/javascript"></script>
<script src="js/backbone.js" type="text/javascript"></script>
</head>
<body>
<div class="list"></div>
<script id="personTemplate" type="text/template">
<td> <strong><%= name %></strong></td>
<td>(<%= age %>) </td>
<td> <%= occupation %> </td>
</script>
<script type="text/javascript">
//Person Model
var Person = Backbone.Model.extend({
defaults: {
name: 'Guest User',
age: 30,
occupation: 'worker'
}
});
// A List of People
var PeopleCollection = Backbone.Collection.extend({
model: Person,
initialize: function(){
alert("intialise")
},
url:'/RestFul/rest/members/info',
});
// View for all people
var PeopleView = Backbone.View.extend({
tagName: 'table',
render: function(){
this.collection.each(function(person){
var personView = new PersonView({ model: person });
this.$el.append(personView.render().el); // calling render method manually..
}, this);
return this; // returning this for chaining..
}
});
// The View for a Person
var PersonView = Backbone.View.extend({
tagName: 'tr',
template: _.template($('#personTemplate').html()),
////////// initialize function is gone from there. So we need to call render method manually now..
render: function(){
this.$el.html( this.template(this.model.toJSON()));
return this; // returning this from render method..
}
});
var peopleCollection = new PeopleCollection();
//peopleCollection.fetch();
peopleCollection.fetch({ success: function () { console.log("collection fetched"); } });
//peopleCollection.fetch({context:collection}).done(function() {
// console.log(this.length)
// })
//console.log(peopleCollection.toJSON())
alert(JSON.stringify(peopleCollection));
var peopleView = new PeopleView({ collection: peopleCollection });
$(document.body).append(peopleView.render().el); // adding people view in DOM
</script>
</body>
</html>
any help will be appreciated
Try with
var fetching = peopleCollection.fetch({ success: function () { console.log("collection fetched"); } });
$.when(fetching).done(function(){
var peopleView = new PeopleView({ collection: peopleCollection });
$(document.body).append(peopleView.render().el); // adding people view in DOM
});
var fetching = peopleCollection.fetch({ success: function () {
var peopleView = new PeopleView({ collection: peopleCollection });
$(document.body).append(peopleView.render().el);
} });
I think we can call the view render inside the success callback

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