app.views.Feedback = app.views.StreamObject.extend({ template_name: "#feedback-template", events: { "click .like_action": "toggleLike", }, initialize : function() { var user_like = this.model.get("user_like") this.like = user_like && this.model.likes.get(user_like.id); this.model.likes.bind("change", this.render, this); this.model.likes.bind("remove", this.render, this); this.model.likes.bind("add", this.render, this); }, presenter : function(){ return _.extend(this.defaultPresenter, {like : this.like}); }, toggleLike: function(evt) { if(evt) { evt.preventDefault(); } if(this.like){ this.like.destroy(); } else { this.like = this.model.likes.create(); } }, })