我想重写骨干集方法,以便每当我为骨干模型设置一个值时,都会调用在该属性上注册的回调,而无需检查该属性的相同先前值。
var model = Backbone.Model.extend({
defaults : {
prop1 : true
}
});
var view = Backbone.View.extend({
initialize : function(){
this.listenTo(this.model,"change:prop1", this.callback);
},
callback : function(){
// set is called on prop1
}
});
var m1 = new model();
var v1 = new view({model:m1});
m1.set("prop1",true); // It doesn't trigger callback because I'm setting the same value to prop1
您可以在主干模型集中编写一个新方法,如下所示:
var model = Backbone.Model.extend({
defaults: {
prop1: true;
},
// Overriding set
set: function(attributes, options) {
// Will be triggered whenever set is called
if (attributes.hasOwnProperty(prop1)) {
this.trigger('change:prop1');
}
return Backbone.Model.prototype.set.call(this, attributes, options);
}
});
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