javascript 骨干集合获取不会触发 reset()
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backbone collection fetch doesn't fire reset()
提问by David Fregoli
This is my view for a collection
这是我对收藏的看法
var mssg = mssg || {};
mssg.MessagesView = Backbone.View.extend({
el: '#messages',
initialize: function() {
this.collection.fetch();
this.collection.bind('reset', this.render, this);
},
render : function() {
this.$el.html('');
this.collection.each(function( item ) {
this.renderMessage( item );
}, this );
return this;
},
renderMessage : function( item ) {
var messageView = new mssg.MessageView({
model : item
});
this.$el.append( messageView.render().el );
}
});
this is the collection
这是集合
var mssg = mssg || {};
mssg.Messages = Backbone.Collection.extend({
model : mssg.Message,
url : 'messages'
});
and this is how it is initialized:
这是它的初始化方式：
var mssg = mssg || {};
$(function() {
new mssg.MessagesView({
collection : new mssg.Messages()
});
});
The problem is that the renderfunction bound to resetdoesn't fire after the ajax fetch request.
问题是render绑定到的函数reset在 ajax 获取请求之后不会触发。
If I bind it to addit works.
I tried binding allto a debuggin function and it says that the syncevent is called alongside the addfor every item.
如果我将它绑定到add它的工作。我尝试绑定all到调试函数，它说该sync事件与add每个项目一起调用。
回答by nikoshr
If you check backbone change log, you'll see that the way fetch is handled changed in 1.0:
如果您检查主干更改日志，您将看到 1.0 中处理 fetch 的方式发生了变化：
Renamed Collection's "update" to set, for parallelism with the similar model.set(), and contrast with reset. It's now the default updating mechanism after a fetch. If you'd like to continue using "reset", pass
{reset: true}
将 Collection 的“更新”重命名为 set，与类似的 model.set() 并行，并与 reset 形成对比。它现在是获取后的默认更新机制。如果您想继续使用“重置”，请通过
{reset: true}
So, to trigger a reset event, you now have to use
因此，要触发重置事件，您现在必须使用
this.collection.fetch({reset: true})
回答by freestyle21
in backbone 1.0, you have to trigger reset by hand:
在主干 1.0 中，您必须手动触发重置：
youColloection.fetch({reset: true});
