Question

I am using backbone.js for creating an application. I have code JS code as follows,

window.RequestsView = Backbone.View.extend({

initialize:function ( input ) {

    console.log('input ' + JSON.stringify(input) );

    this.variables = {   request_id:input.model.id,
                         status:input.model.status,
                         mavenGav:input.model.mavenGav, 
                         email:input.model.emailId, 
                         errorNo:input.model.errorNo, 
                         errorDesc:input.model.errorDesc };

    console.log("variables : "+ JSON.stringify( this.variables ) );

    this.template = _.template(tpl.get('requests'));
    var out = this.template( input );

    console.log("out: "+ JSON.stringify( out ) );

    // deep copy the object
    this.request =  $.extend( true, {},  input);
}

});

When I debug this in chrome debugger, I get the following logs,

input {"model":{"mavenGav":"fgdfgfdgdfg:fgdfgfd:gdfgdfg","repositories":["dfgdfgdfgf"],"emailId":"gdfg","id":1083,"createdTime":null,"status":"CREATED","errorNo":0,"errorDesc":null}}
requests.js:12variables : {"request_id":1083}

There are no errors. What happens to the rest of the javascript literal that got assigned to this.variables ?

Answer 1

undefined values are not stringified to json, because json only knows numbers, strings, booleans, null and objects/arrays. So the properties exist, but they “get lost” in conversion.

Try console.debug("variables :",this.variables), that will let you inspect the variables object.