在模板上渲染骨干集合时无法获取模型的cid

Question

I am trying to render a backbone collection on a template that is built with mustache.js . The problem is I couldn't get the cid of the model in the template. My code is

        <div class="phone span4">
            <h5> Phone Appointments</h5>
            {{ _.each(slots, function(slot) { }}
                {{ if(slot.aptType == "P"){ }}
                    <h6 cid="{{=slot.cid}}"  aptId="{{=slot.aptId}}"> {{=slot.beginTime}}  - {{=slot.endTime}} </h6>
                {{  }   }}
            {{  }); }}
        </div>

from the above code, I can get the aptId, beginTime and end Time, but not the Cid. How to get the Cid of the model from a collection while rendering it on a template?

and my render method from the view looks like this

    render:function(){
    var template = _.template($("#slot-display-template").html());
    compiledTmp = template({slots: this.collection.toJSON()})
    this.$el.append(compiledTmp);
    }

Also is there any disadvantage of using cid as the unique identifier of a model ?

Thanks in advance !!!

Answer 1

The cid is not included by default in the toJSON output. You will need to override toJSON in your model definition and include cid .

toJSON: function() {
  var json = Backbone.Model.prototype.toJSON.apply(this, arguments);
  json.cid = this.cid;
  return json;
}

Answer 2

如果您需要广告解决方案，这也可以：

var params = _.extend({}, this.model.toJSON(), {cid: this.model.cid})

Answer 3

By the way if you don't need to extend behavior of all models you can just add cid to your model using parse method. For example you have collection 'Collection'. You can specify model for this collection and override parse method to attach model's cid to the response.

var Collection = Backbone.Collection.extend({
    model: Model
});

var Model = Backbone.Model.extend({
    parse: function(response) {
        response.cid = this.cid;
        return response;
    }
});

So you'll be able to get cid from model's attributes.