Heroku causing issues with the functionality of my Rails and Angular.js application through the minification of JS files

I'm currently working on a new Rails 4.2.0 app with Angular.js deployed on Heroku. Here's the angular.js controller I've implemented:

angular.module("CarDealer.controllers",[]).controller('carsController', function ($scope, carDealerAPIservice) {
  $scope.nameFilter = null;
  $scope.carsList = [];

  carDealerAPIservice.getCars().success(function (response) {
    $scope.carsList = response;
  });
});

In my view, I have the following setup:

<div class="row" data-ng-controller="carsController">
  <div class="row">
    <div class="col-md-4">
      <input type="text" ng-model="nameFilter" placeholder="Find vehicle..." class="form-control" autofocus="true"/>
    </div>
  </div>

  <ul data-ng-repeat="car in carsList | filter: nameFilter">
    <li>{{ car.model_name }} - {{ car.year }} </li>
  </ul>

However, upon opening the page, nothing renders and I get the following error in the console:

Error: [$injector:unpr] Unknown provider: eProvider <- e <- carsController

While everything operates smoothly in development mode, production mode presents this issue. How can I resolve it? Disabling asset compression hasn't helped so far.

Your help is much appreciated.

Answer №1

To prevent issues with minified sources, it is recommended to inject dependencies using the following syntax:

controller('carsController', ['$scope', 'carDealerAPIservice', function ($scope, carDealerAPIservice) { 
//code
}]);

Answer №2

Minifying Angular files can sometimes cause issues with the asset pipeline unless you utilize a specific array syntax for handling strings in dependency injection. One simple solution for Rails developers is to include the ng annotate gem, which eliminates the need for code modifications. Alternatively, disabling uglification can also prevent complications:

# config/environments/***.rb
config.assets.js_compressor = Uglifier.new(mangle: false)

In development mode, your code functions properly as it remains unminified.

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