我有一个类别树,我想使用 Backbone.js 进行渲染,而不是使用 jQuery 或在服务器端进行渲染。我有以下突破,我将其描述为模板:
<li>
<select class="categories">
<option value="">Select</option>
</select>
<input class="edit" type="button" value="Edit">
<input class="add" type="button" value="Add">
</li>
select
我单独渲染为内部视图的标签。当我更改选择时,我需要从服务器获取嵌套类别并li
使用上面包含在标签中的模板将它们附加到标签中ul
。在外部视图中,我创建内部视图并在编辑和添加时点击监听事件。当嵌套级别超过一个时,我对最后一个事件有疑问,因为它们的触发次数与嵌套级别相同。我究竟做错了什么?
下面的代码片段显示了我如何使用外部和内部视图:
var CategoriesInnerView = Backbone.View.extend({
tagName: 'select',
initialize: function(){
_.bindAll(this,'addOne','addAll');
this.collection.bind('reset',this.addAll);
},
addOne: function(category){
this.$el.append(new CategoryView({model:category}).render().el);
},
addAll: function(){
this.collection.each(this.addOne);
},
events: {
'change':'changeSelected'
},
changeSelected:function(){
var children = new Categories();
children.url = 'categories/' + this.$el.val();
var childrenView = new CategoriesOuterView({collection:children});
this.$el.parent().find('ul').remove();
this.$el.parent().append(childrenView.render().el);
children.fetch();
}
});
var CategoriesOuterView = Backbone.View.extend({
tagName: 'ul',
template: _.template($('#categories-template').html()),
initialize:function(){
this.inner = new CategoriesInnerView({collection:this.collection});
},
render: function(){
this.$el.html(this.template);
this.inner.setElement(this.$('select')).render();
return this;
},
events: {
'click .edit':'edit',
'click .add': 'add'
},
edit: function(){
this.renderForm(this.collection.get(this.inner.$el.val()));
},
add: function(){
this.renderForm(new Category());
},
renderForm:function(category){
// some code to render the form
}
});