Angularjs: ng-click übergabe einzelner Parameter

angular.module('PizzaApp', )  
  .factory('Cart', function() {  
    var items = ;
    return {
      getItems: function() {
        return items;
      },
      addPizza: function(pizza) {
        items.push(pizza);
      },
      sum: function() {
        return items.reduce(function(total, pizza) {
          return total + pizza.price;
        }, 0);
      }
    };
  })
  .controller('PizzasCtrl', function($scope, $http, Cart){  
    $scope.cart = Cart;
    $http.get('pizzas.json').then(function(pizzasResponse) {  
      $scope.pizzas = pizzasResponse.data;
    });
  })
  .controller('CartCtrl', function($scope, Cart){  
    $scope.cart = Cart;
  });

<table class="table" ng-controller="PizzasCtrl">  
      <tr ng-repeat="pizza in pizzas">  
        <td>{{pizza.name}}</td>
        <td>{{pizza.price}}</td>
        <td><a href class="btn btn-default btn-sm" ng-click="cart.addPizza(pizza);">Hinzufügen</a></td>  
      </tr>
    </table>

ng-click="cart.addPizza(pizza.1)