Passing data between controllers in Angular JS?

ghz 1years ago ⋅ 5730 views

Question

I have a basic controller that displays my products,

App.controller('ProductCtrl',function($scope,$productFactory){
     $productFactory.get().success(function(data){
           $scope.products = data;
     });
});

In my view I'm displaying this products in a list

<ul>
    <li ng-repeat="product as products">
        {{product.name}}
    </li>
</ul

What I'm trying to do is when someone click on the product name, i have another view named cart where this product is added.

 <ul class="cart">
      <li>
          //click one added here
      </li>
      <li>
          //click two added here
      </li>
 </ul>

So my doubt here is, how do pass this clicked products from first controller to second? i assumed that cart should be a controller too.

I handle click event using directive. Also i feel i should be using service to achieve above functionality just can't figure how? because cart will be predefined number of products added could be 5/10 depending on which page user is. So i would like to keep this generic.

Update:

I created a service to broadcast and in the second controller i receive it. Now the query is how do i update dom? Since my list to drop product is pretty hardcoded.

Answer

From the description, seems as though you should be using a service. Check out http://egghead.io/lessons/angularjs-sharing-data-between-controllers and [AngularJS Service Passing Data Between Controllers](https://stackoverflow.com/questions/17952620/angularjs-service- passing-data-between-controllers) to see some examples.

You could define your product service (as a factory) as such:

app.factory('productService', function() {
  var productList = [];

  var addProduct = function(newObj) {
      productList.push(newObj);
  };

  var getProducts = function(){
      return productList;
  };

  return {
    addProduct: addProduct,
    getProducts: getProducts
  };

});

Dependency inject the service into both controllers.

In your ProductController, define some action that adds the selected object to the array:

app.controller('ProductController', function($scope, productService) {
    $scope.callToAddToProductList = function(currObj){
        productService.addProduct(currObj);
    };
});

In your CartController, get the products from the service:

app.controller('CartController', function($scope, productService) {
    $scope.products = productService.getProducts();
});
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