Ember Save a change to an attribute

Very new to Ember, quick question please: How do I save/persist a change to an attribute? Have the following action in the controller:

actions: {

    togOnField: function(){

        if (this.get('onField')){
            this.set('onField', false);
        } else {
            this.set('onField', true);
        }
    }

}

Looking around I've found

this.get('model').save

At the moment, using this, the attribute is immediately reverting back to its previous state. Does this mean the save is unsuccessful? Working with a Sails API and Postgres DB, both seem to be working fine.

And what are the different options for how I might save from this action? Thanks a lot.