真正在Backbone.js的默默更改模型的属性？ [英] Truly change a model attribute silently in Backbone.js?

问题描述

有没有一种方法，我可以改变模型的属性而没有触发更改事件？如果你通过 {沉默：真正} 现在，下一次的属性被改变，沉默的变化将触发事件。我可以肯定地更改属性没有改变过的事件被触发？

这变化，骨干0.9.2：

  //无声的变化成为挂起的更改。
对（在this._silent VAR attr）使用this._pending [ATTR] =真;//无声的变化引发的。
VAR变化= _.extend（{}，options.changes，this._silent）;
this._silent = {};
对于（的变化VAR ATTR）{
    this.trigger（'的变化：+ ATTR，对此，this.get（attr）使用，期权）;
 

解决方案

我认为最干净的方式，如果你真的想默认为沉默的（但仍能够做沉默：假）设置将覆盖设置。这应该做到这一点：

  VAR SilentModel = Backbone.Model.extend（{    设置：功能（ATTRS，期权）{
        选项​​=选项|| {};
        如果（！期权（沉默））{
            options.silent = TRUE;
        }
        返回Backbone.Model.prototype.set.call（这一点，ATTRS，期权）;
    }
}）;
 

Is there a way I can change attributes on a model without ever firing a change event? If you pass {"silent":true} right now, the next time an attribute is changed, the silent change event will be triggered. Can I change an attribute safely without the change event ever being triggered?

from change, Backbone 0.9.2:

// Silent changes become pending changes.
for (var attr in this._silent) this._pending[attr] = true;

// Silent changes are triggered.
var changes = _.extend({}, options.changes, this._silent);
this._silent = {};
for (var attr in changes) {
    this.trigger('change:' + attr, this, this.get(attr), options);

解决方案

I think the cleanest way if you really want to default to silent (but still be able to do silent:false) sets would be to override set. This should do it:

var SilentModel = Backbone.Model.extend({

    set: function(attrs, options) {
        options = options || {};
        if (!('silent' in options)) {
            options.silent = true;
        }
        return Backbone.Model.prototype.set.call(this, attrs, options);
    }
});

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