AngularJS - Issue: [ng:areq] The 'fn' argument provided is not a function, instead it is a string

I encountered an issue:

Error: [ng:areq] Argument 'fn' is not a function, received string

Despite following the recommendations of others, I still have not been able to resolve the problem.

Below is the code snippet in question:

controller.js

angular.module('starter.controllers', [])
   .controller('DashCtrl', function ($scope,$ionicScrollDelegate,SocketService) {
      var me = this;
      me.messages = [];
      $scope.sendTextMessage = function() {
        var msg = {
          'text': me.messages
      }
      me.messages.push(msg);
      $ionicScrollDelegate.scrollBottom();
      me.messages = '';
      SocketService.emit('mesaj', msg);
   };
});

services.js

angular.module('starter.services', [])
   .service('SocketService', ['socketFactory'],
      function SocketService(socketFactory) {
        return socketFactory({
           ioSocket: io.connect('http://l92.168.1.27:3000')
        });
   });

Answer №1

When declaring an angular module, it is recommended to omit the second parameter.

Instead of writing:

angular.module('starter.controllers', [])
, it is better to write:
angular.module('starter.controllers')

Answer №2

There are a couple of points that stand out to me:

1) No injections were found; let's correct these lines to:

.controller('DashCtrl', ['scope', '$ionicScollDelegate', 'SocketService', function ($scope, $ionicScrollDelegate, SocketService){

and

.service('SocketService', ['socketFactory',

In the last line, it might be better to combine the SocketService() function like this:

app
 .service('SocketService', ['socketFactory', function(socketFactory) {
   return socketFactory({
     ioSocket: io.connect('http://l92.168.1.27:3000')
  });
 }])

2) It seems you have two separate apps. Instead of scattering angular.module() calls everywhere, define it in one central location:

var app = angular.module('starter', []);

Then you can refer to it elsewhere like this:

app
  .service('SocketService', [.... etc

Observe this concept in action in the second part of point 1)

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