模型内的骨干集合

Question

我是骨干的新手，我想知道是否有办法将集合中的先前模型保存为模型本身的属性。例如，

var history = Backbone.Collection.extend({});

var myModel = Backbone.Model.extend({
  defaults: {
         id: '',
         name: '',
         history: history //history is a collection of myModel
          },

  //override setter so when set method is called, it will save the previous model inside history collection.

})

Answer 1

这将是短暂的历史

var myModel = Backbone.Model.extend({    
    defaults:{
        id:''
    },
    constructor: function(){
       this.history = new Backbone.Collection();
    },

    set: function(){
      var args = Array.prototype.slice.call(arguments);
      this.history.add(this.toJSON());
      return Backbone.Model.prototype.set.apply(this, args);
    }
});