Angular.js refresh service inside a controller

Question

i have a simple service inside a controller:

function OPctrl($scope, $http) {
    var s = 'http://query.yahooapis.com/v1/public/yql?q=select * from etc..... &format=json&callback=JSON_CALLBACK';
  $http.jsonp(s).success(function(data) {
      $scope.titoli = data.query.results.ROWSET.ROW;
  }).
  error(function(data, status, headers, config) {
    alert("error!")
    });
}

The controller bind some data in a table. I need to recall and refresh data every time i need (i.e. with a refresh button). Can i work inside my controller ?How to ? Or i need a custom service? I am new to angular can anyone help?

asgoth · Accepted Answer · 2013-01-04 11:19:19Z

1

It is better to use a custom service. To return the data to your controller, you have three possible options:

return a promise (using $q) and set the scope value in the promise then() function
add a callback to your service function and set the scope value within
let your service return an object instead of a primitive type and set it to a scope

To use your service you just inject it in your controller:

app.contoller('Ctrl', ['$scope', 'service', function($scope, service) {
...
}]);

All three possibilities can be seen in action is this jsFiddle.

answered Jan 4, 2013 at 11:19

asgoth

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4 Comments

madimper Over a year ago

Thx, i know this fiddle already. Is a very complex example for a newbie like me.

asgoth Over a year ago

Sorry about that. It is complex because it shows the 3 types, which causes quite some coding.

madimper Over a year ago

If possible, i need a more straightforward tutorial. For now i can't figure out the rules about events and controllers in an angular application.

asgoth Over a year ago

Then I suggest you start here. There are also some interesting YouTube screencasts.

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