是什么在Backbone.js的覆盖Model.get（attr）使用的最佳方法？ [英] What's the best way to override Model.get(attr) in Backbone.js?

问题描述

我使用Backbone.js的首次，并且喜欢它至今。有一件事我不能在模型动态属性的时刻锻炼。例如，假设我有一个Person模型，我希望得到他们的全名：

I'm using Backbone.js for the first time, and liking it so far. One thing I can't work out at the moment in dynamic attributes of models. For example, say I have a Person model, and I want to get their full name:

var Person = Backbone.Model.extend({
  getFullName: function () {
    return this.get('firstName') + ' ' + this.get('surname');
  }
});

然后我可以做 person.getFullName（）。但我想保持它与其他干将一致，更像 person.get（'全名'）。我不知道该怎么办，没有乱七八糟覆盖人＃得到。或者是我唯一的选择？

Then I could do person.getFullName(). But I'd like to keep it consistent with the other getters, more like person.get('fullName'). I don't see how to do that without messily overriding Person#get. Or is that my only option?

这是我到目前为止已经得到了压倒一切的选项：

This is what I've got so far for the overriding option:

var Person = Backbone.Model.extend({
  get: function (attr) {
    switch (attr) {
    case 'fullName':
      return this.get('firstName') + ' ' + this.get('surname');
      break;
    case 'somethingElse':
      return this.doSomethingClever();
      break;
    default:
      return Backbone.Model.prototype.get.call(this, attr);
    }
  }
});

我想这并不可怕，但它似乎应该有一个更好的办法。

I suppose it's not terrible, but it seems there should be a better way.

推荐答案

这将是更简单呢？

var Person = Backbone.Model.extend({
  get: function (attr) {
    if (typeof this[attr] == 'function')
    {
      return this[attr]();
    }

    return Backbone.Model.prototype.get.call(this, attr);
  }
});

这样，你也可以覆盖与功能的现有属性。你觉得呢？

This way you could also override existing attributes with functions. What do you think?

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