How to retrieve URL parameters from within the when() function in AngularJS

Consider the code snippet below:

$routeProvider.when('/movies/:type', {
        title: 'Movies',
        templateUrl: 'pages/movies/movies.html',
        controller: 'MoviesCtrl'
      });

Is there a way to retrieve the :type parameter within the when function? I aim to achieve something similar to this:

$routeProvider.when('/movies/:type', {
            title: 'Movies' + ' - ' + :type,
            templateUrl: 'pages/movies/movies.html',
            controller: 'MoviesCtrl'
          });

The value in the title attribute should be dynamically generated.

Appreciate your help!

Answer №1

It's unclear why you're extending the route (config) object, but accessing routeParams from within your controller is the recommended approach.

The $routeParams service allows you to fetch the current set of route parameters.

angular.module('MyModule').controller('MoviesCtrl',function($scope, $routeParams) {

    $scope.currentMovieType = 'Filmes-' + $routeParams.type;

});

For example, if your route is something like /movies/scifi, then $scope.currentMovieType will be scifi. You can display this value using {{currentMovieType}} in your view. More information can be found in the documentation.

Keep in mind that the $routeParams are only updated after a successful route change. Therefore, do not rely on $routeParams being accurate in route resolve functions. Instead, use $route.current.params to access the new route's parameters.

Answer №2

It may seem challenging to make the route config object dynamic, but in reality, it's quite static. The configuration is set only once when the route is defined, and it does not change based on future route parameter values.

If you need to update the page title based on the route parameter value, you can utilize the $routeParams service to access the parameter and the $document service to modify the title. This can be done within a controller or using a resolve statement.

For instance, consider the following implementation:

$routeProvider.when('/movies/:type', angular.extend({
  templateUrl: 'pages/movies/movies.html',
  controller: 'MoviesCtrl',
  resolve: {
    title: ['$routeParams','$document', function ($routeParams, $document) {
      var title = 'Filmes-' + $routeParams.type;
      $document.title = title;
      return title;
    }]
  }
}, defaults));

This approach also works effectively within a controller context.

A couple of observations regarding your code:

  • Concerning the inclusion of a title property in the route config object, this practice might not align with AngularJS documentation recommendations. It's not referenced in the official documentation.
  • The naming of the second argument, defaults, within the angular.extend function could potentially lead to confusion as it resembles the $routeParams service. Consider utilizing a clearer name like routeDefaults for better clarity.

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