我有渲染集合的问题。它的标题和标题布尔'完成'的简单模型,当你点击列表项时它会改变为完成值(真/假)。值已更改(我知道,因为当我刷新页面时,在fetch()之后的初始化中,我有collection.pluck,其中比较器的顺序是正确的),但视图始终看起来相同。
在集合中我有比较器,就像我在上面描述的那样工作,在collection.fetch()之后我有采摘,并且pluck给了我很好的排序列表(但是在视图中我看到不好,默认顺序)。我不知道如何刷新集合以进行良好的排序。
收藏只是:
var TodolistCollection = Backbone.Collection.extend({
model: TodoModel,
localStorage: new Store('todos-backbone'),
// Sort todos
comparator: function(todo) {
return todo.get('completed');
}
});
模型是:
var TodoModel = Backbone.Model.extend({
defaults: {
title: '',
completed: false
},
// Toggle completed state of todo item
toggle: function(){
this.save({
completed: !this.get('completed')
});
}
});
return TodoModel;
单个todoView是:
var TodoView = Backbone.View.extend({
tagName: 'li',
template: JST['app/scripts/templates/todoView.ejs'],
events: {
'click .js-complete': 'toggleCompleted'
},
initialize: function(){
this.listenTo(this.model, 'change', this.render);
},
render: function() {
this.$el.html( this.template( this.model.toJSON() ));
this.$el.toggleClass( 'l-completed', this.model.get('completed') );
return this;
},
// Toggle the `"completed"` state of the model.
toggleCompleted: function() {
this.model.toggle();
}
和app查看:
var ApplicationView = Backbone.View.extend({
el: $('.container'),
template: JST['app/scripts/templates/application.ejs'],
events: {
'click #add' : 'createOnEnter',
'keypress #addTodo' : 'createOnEnter'
},
// aliasy do DOMu,
// nasluchiwanie w kolekcji czy zaszlo jakies zdarzenie, jesli tak, to wykonuje funkcje
initialize: function() {
this.$input = this.$('.js-input');
this.listenTo(todoList, 'add', this.addOne);
this.listenTo(todoList, 'reset', this.addAll);
this.listenTo(todoList, 'all', this.render);
todoList.fetch();
console.log(todoList.pluck('title'));
},
render: function() {
},
// Generate the attributes for a new Todo item.
newAttributes: function() {
return {
title: this.$input.val().trim(),
completed: false
};
},
// Tworzy nowy model dzieki newAtributes() do localStorage
addTodo: function ( e ) {
e.preventDefault();
if( e.which !== Common.ENTER_KEY || !this.$input.val().trim() ){
return;
}
todoList.create( this.newAttributes() );
this.$input.val('');
},
// Tworzy model i dopisuje go do listy
addOne: function( todo ){
var view = new todoView({ model: todo });
$('.js-todolist').append( view.render().el );
},
// Tworzy nowego todo gdy nacisniemy enter
createOnEnter: function( e ) {
if( e.which !== Common.ENTER_KEY || !this.$input.val().trim() ){
return;
}
todoList.create( this.newAttributes() );
this.$input.val('');
},
// Przy rerenderze, dodaj wszystkie pozycje
addAll: function() {
this.$('.js-todolist').html('');
todoList.each(this.addOne, this);
}
});
return ApplicationView;
当我改变listenTo渲染时:this.listenTo(todoList,'all',function(){console.log('whateva')});我可以看到点击“全部”触发(每次点击甚至三次; s)。
我很难把它放在jsfiddle上,但这里是所有文件的git链接:https://github.com/ozeczek/ozeczek/tree/master/bb-todo-yo/app/scripts
答案 0 :(得分:1)
在app视图中初始化我已将todoList.fetch()更改为todoList.fetch({reset:true});
第二个问题是以浏览器的正确顺序显示todos,我已添加初始化:
this.listenTo(todoList, 'change', this.walcze);
this.listenTo(todoList, 'remove', this.walcze);
和walcze的身体功能是:
walcze: function(){
todoList.sort();
this.$('.js-todolist').html('');
todoList.each(this.addOne, this);
}
现在每次Todo paremeter完成更改,Im排序列表(比较器本身不是),清除div与列表,并重写整个列表。我认为这不是最好的方式,但它确实有效。