Backbone.model.save sending the whole backbone.model in request body

Question

when i backbone.Model.save() , it sends the whole model data (each and every property even when it has not been modified) in the body of the request.

i want to send in the body only properties of the model, that has been modified.

I am doing :

here.model.save( 
                  {field:params.value},
                  { patch: true,
                    error: function() {
                      d.reject('Server Error..!');
                    },
                    success: function() {
                      d.resolve();
                    }
                  }
                );

but patch:true doesn't work.

what is the error? and how to resolve?

Answer 1

patch works only for already created models. In case if your model is new it wouldn't work.

How to fix it:

var model = new Backbone.Model();
var attributesToSave = {};
model.save(null, {attrs:attributesToSave});