cell

gistfile1.js

{
	        name: "rechazo",
	        label: "Rechazos",	        
	        editable: false,
	        cell: Backgrid.Cell.extend({
				render: function () {
					if(this.model.attributes['rechazos'] > 0) {
						this.$el.html('<a class="botonrechazo-centro-periodo" data-id="' + this.model.attributes['id'] + '" role=button href="#modalAccionesCPRechazos" data-toggle="modal"><button class="btn">Historial de Rechazos ('+ this.model.attributes['rechazos'] +')</button></a>');	
					} else {
						this.$el.html('<button class="btn" disabled>Historial de Rechazos ('+this.model.attributes['rechazos']+')</button>');
					}					
					return this;
				}  	        	       
			})
	    },
	    
	    
	    
	    
	    //another
	    
	    var collectionnn = collectionCentroPeriodoDto.models;
   	
   	_.each(collectionnn, function (model) {
		
		model.set({rechazo: 1});
	});

change:rechazo will be automatically listened to when you construct the cell