How can we maintain data across states in UI Router without the need to pass them explicitly to $state.go(...)?

Question

How can we maintain data across states in UI Router without the need to pass them explicitly to $state.go(...)?

In the Gallery component, I have language code:

function Gallery(LanguageService) {
  var $ctrl = this;
  $ctrl.$onInit = function () {
     $ctrl.code = LanguageService.language;
     _loadGallery($ctrl.code);
  }
}

The LanguageService is a service that holds global language settings. For instance, codes like en for English and pl for Polish. When moving from the Gallery to the Image details component, the $onInit process remains the same - extract the code from the language and load data. The issue arises when adding image translations; for example, German translation with code de. This change affects the LanguageService, leading to mismatched languages:

The Image displays in German
Clicking on the Go back button redirects to the Gallery
The Gallery lacks German translation results in a 404 Not Found error

One solution could be passing the galleryLanguage state to the Image:

$state.go("image.details", {id: image.id, galleryLanguage: $ctrl.language});

Yet, it's cumbersome without explicit definition in each image state; for example, transitioning from image.details to

image.edit</code requires:</p>

<pre><code>$state.go("image.edit", {id: image.id, galleryLanguage: $ctrl.language});
// To return to the gallery
function goBackToGallery() {
  $state.go(`gallery.details`, {galleryLanguage: $ctrl.galleryLanguage}); // then used in the Gallery if present
}

Alternatively, an additional service can handle this scenario:

function Gallery(LanguageService, TemporaryService) {
    var $ctrl = this;
    $ctrl.$onInit = function () {
      $ctrl.code = TemporaryService.language? TemporaryService.language : LanguageService.language;
      TemporaryService.language = undefined;
      _loadGallery($ctrl.code);
  }

  function goToImageDetails(image) {
    TemporaryService.language = String($ctrl.code);
    $state.go('image.details', {id: image.id});
  }
}

Perhaps Angular UI router offers a solution without custom implementation. Appreciate all assistance provided.

javascript angularjs routes angular-ui-router angular-ui

Answer 1

Answer №1

You can achieve this functionality using ui-route without parameters by following the example below:

Method one:

.state('eventListing', {
    url: '/events',
    templateUrl: 'views/eventListing.html',
    controller: 'eventListing',
    resolve: {
        categoryInfo: function() {
            return { id: 1 };
        }
    }
})

In the controller, you can access it like this:

app.controller('eventListing', ['$scope', 'categoryInfo',
    function ($scope, categoryInfo) {
        $scope.categoryId = parseInt(categoryInfo.id);
    }
]);

Reference: ui-router Resolving

Method two:

In this method, you do not need to use resolve. Simply pass an object with a data key in the ui-router state and access it in the controller using $state.current.data. See the example below:

.state('eventListing', {
    url: '/events',
    templateUrl: 'views/eventListing.html',
    controller: 'eventListing',
    data: {
        id: 1
    }
})

In the controller, you can access it like this:

app.controller('eventListing', ['$scope', '$state',
    function ($scope, $state) {
        $scope.categoryId = parseInt($state.current.data.id);
    }
]);

Answer 2

You can achieve this functionality using ui-route without parameters by following the example below:

Method one:

.state('eventListing', {
    url: '/events',
    templateUrl: 'views/eventListing.html',
    controller: 'eventListing',
    resolve: {
        categoryInfo: function() {
            return { id: 1 };
        }
    }
})

In the controller, you can access it like this:

app.controller('eventListing', ['$scope', 'categoryInfo',
    function ($scope, categoryInfo) {
        $scope.categoryId = parseInt(categoryInfo.id);
    }
]);

Reference: ui-router Resolving

Method two:

In this method, you do not need to use resolve. Simply pass an object with a data key in the ui-router state and access it in the controller using $state.current.data. See the example below:

.state('eventListing', {
    url: '/events',
    templateUrl: 'views/eventListing.html',
    controller: 'eventListing',
    data: {
        id: 1
    }
})

In the controller, you can access it like this:

app.controller('eventListing', ['$scope', '$state',
    function ($scope, $state) {
        $scope.categoryId = parseInt($state.current.data.id);
    }
]);

Answer 3

Answer №2

1- Utilize the params option within your route configuration

.state('about', {
        url: '/about?isDraft',
        params: {
         isDraft: null
        }
      })

2- Implement services as mentioned

3- Save your data in sessionStorage

These are the choices I recommend.

Answer 4

1- Utilize the params option within your route configuration

.state('about', {
        url: '/about?isDraft',
        params: {
         isDraft: null
        }
      })

2- Implement services as mentioned

3- Save your data in sessionStorage

These are the choices I recommend.

How can we maintain data across states in UI Router without the need to pass them explicitly to $state.go(...)?

Answer №1

Answer №2

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