javascript - cannot get the cid of the model while rendering a backbone collection over a template - Stack Overflow

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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 !!!

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 !!!

• javascript
• templates
• backbone.js
• mustache

Share Improve this question Follow edited Mar 8, 2013 at 16:38 Ben 10.1k55 gold badges4242 silver badges4242 bronze badges asked Mar 8, 2013 at 16:16 digToGetWaterdigToGetWater 17122 silver badges99 bronze badges 1

• Why do you need the cid to be in the html? If you have the model's id (looks like aptId is the idAttribute?), you can find it in the collection, collection.get(modelId). – Paul Hoenecke Commented Mar 8, 2013 at 16:32

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3 Answers 3

Sorted by: Reset to default 23

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;
}

If you need an ad hock solution, This would work also:

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

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.

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