Having difficulty retrieving model values from the angular ui modal dialog

Being only on my second day in the world of Angular, I am trying to navigate around Angular UI and build my first modal dialog. The modal dialog displays properly, but I'm encountering an issue with using models within it. You can view my demo on Plunker.

Here are the steps I've taken so far:

In the controller:

appRoot.controller('DemoCtrl', function ($scope, $modal) {
$scope.openDemoModal = function (size) {
        var modalInstance = $modal.open({
            templateUrl: 'ngPartials/_DemoModal.html',
            controller: 'modalCtrl',
            size: size,
            backdrop: true,
            keyboard: true,
            modalFade: true
        });
    };
});

In index.html:

<div ng-controller="DemoCtrl">
  <a ng-click="openDemoModal()">Open Modal</a>
</div>

In _DemoModal.html

<div class="modal-header">
    <h3 class="modal-title">Test Modal</h3>
</div>
<div class="modal-body">
            <input ng-model="testModel"/>
</div>
<div class="modal-footer">
    <button ng-click="test()">Test</button>
    <button ng-click="cancel()">Cancel</button>
</div>

In controller modalCtrl

appRoot.controller('modalCtrl', function ($scope, $modalInstance) {

    $scope.test = function () {
        var temp = $scope.testModel; // This shows undefined
    };

    $scope.cancel = function () {
        $modalInstance.dismiss('cancel');
    };
});

In modalCtrl, the $scope.testModel always remains undefined, regardless of what is in the text box. Even if I set the value of $scope.testModel="some value" initially, it won't change based on user input. What am I doing wrong?

Furthermore, I want to establish communication between DemoCtrl and modalCtrl. In an attempt to do this, I used the concept of events as shown below:

In modalCtrl:

 $scope.test = function () {
      //var temp = $scope.testModel; // This shows undefined
      $scope.$emit('someEvent', 'some args');
 };

In DemoCtrl:

$scope.$on('someEvent', function (event, args) {
        alert('event called');
});

However, this method also didn't work for me. Am I approaching creating an Angular modal incorrectly? Any assistance would be greatly appreciated. Thank you.

Answer №1

It seems like the issue at hand is a common problem with inheritance in angular ui bootstrap modal. While I may not have the exact cause (aside from it being related to $scope), I've come across this multiple times and my solution is to explicitly define the main model object on the scope of the modal controller as soon as it is created. You can give this a shot;

appRoot.controller('modalCtrl', function ($scope, $modalInstance) {
    //Declare the model explicitly on the controller rather than implicitly on the view
    $scope.testModel="";
    $scope.test= function () {
        var temp = $scope.testModel;//This shows undefined
    };

    $scope.cancel = function () {
        $modalInstance.dismiss('cancel');
    };
});

UPDATE:

Upon examining the $scope of the modal, it appears that the testModel object resides within the $$childTail scope. This indicates that the modal has created its own child $scope and bound testModel to that specific $scope. To work around this, you can use ng-model="$parent.testModel" to reference the parent $scope - the correct scope we defined for the modal.

Check out the working plunk here.

Answer №2

It seems like there is a scope problem happening here. Essentially, your model testModel is being created within a different scope, specifically a child scope. To resolve this issue, you should utilize an object attached to your modal's scope instead of just a variable:

appRoot.controller('modalCtrl', function($scope, $modalInstance) {
  $scope.data = {
    testModel: ""
  };
  $scope.test = function() {
    var temp = $scope.data.testModel; //This displays as undefined
    alert(temp);
  };

  $scope.cancel = function() {
    $modalInstance.dismiss('cancel');
  };
});

Take a look at the updated plunk

UPDATE:

If you now need a way for two controllers to communicate using $emit, simply specify the parent scope when creating the modal. Therefore, you will have to adjust your code like so:

$scope.openDemoModal = function(size) {
    var modalInstance = $modal.open({
      templateUrl: '_DemoModal.html',
      controller: 'modalCtrl',
      size: size,
      backdrop: true,
      keyboard: true,
      modalFade: true,
      scope: $scope // make sure to include this.
    });
  };

Updated demo that works

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Is it possible to access the passed arguments in the test description using jest-each?

Utilizing TypeScript and Jest, consider this sample test which can be found at https://jestjs.io/docs/api#testeachtablename-fn-timeout it.each([ { numbers: [1, 2, 3] }, { numbers: [4, 5, 6] } ])('Test case %#: Amount is $numbers.length =&g ...

Navigate the div with arrow keys

Looking for an answer similar to this SO post on moving a div with arrow keys, could a simple and clear 'no' be sufficient: Is it possible to turn an overflowing div into a "default scroll target" that responds to arrow-up/down/page-down/space k ...

Error: Supabase and Next.js encountered a self-signed certificate within the certificate chain causing an AuthRetryableFetchError

Encountering an error related to certificates while attempting to retrieve the user from Supabase within getServerSideProps using Next.js: AuthRetryableFetchError: request to https://[redacted].supabase.co/auth/v1/user failed, reason: self signed certifica ...

Unsuccessful translation of HTML symbol codes within a toggle function using jQuery

Is there a way to toggle between the symbols + and - using HTML entity codes &#43; and &#45;? I have attempted different solutions for toggling HTML content, but none seem to work correctly with these specific codes. It toggles once, but doesn&apo ...

Combine the serialized form data along with an array and post them together

I am encountering difficulties with sending the form through ajax. Along with the information input by the user, I also need to include an array of objects in the data being sent. AJAX POST: submitHandler: function (form) { $.ajax({ ...

The post function is causing an issue and displaying an error

I am currently working on a test application that is based on the tutorial found at https://docs.angularjs.org/tutorial/step_00. The app is functioning well, however, I am encountering an issue with the post method. index.html ... <div class="control_ ...

Customize hoverIntent to support touch events on mobile devices

Hello everyone. I've encountered an issue with hoverintent.js, a jQuery plugin that handles mouseOver events differently than usual. I am facing constraints where I can only modify the JavaScript of this plugin, but I need it to be compatible with to ...

The Bootstrap 3.3 Carousel is stationary and does not rotate

I am facing a challenge with implementing a Carousel using Bootstrap version 3.3.7 on my website. The code snippet is as follows: <!-- Carousel ================================================== --> <div class="row dark-start d-none d-lg-block"&g ...

Consistentize Column Titles in Uploaded Excel Spreadsheet

I have a friend who takes customer orders, and these customers are required to submit an excel sheet with specific fields such as item, description, brand, quantity, etc. However, the challenge arises when these sheets do not consistently use the same colu ...

Dealing with the 'routes not found' error in a Node.js Express application (troubleshooting)

Attempting to address potential missing router errors in my app.js or router file has been a challenge for me. (various solutions found on Stack Overflow have not provided the correct resolution) The current state of my app.js or router files is functiona ...

What are some ways to accomplish this task without relying on a photo editing tool?

Is it possible to swap the image link: with this new link: without having to use a photo editor? Below is the CSS and HTML code: I was unable to upload the logo due to the restriction of needing at least 10 reputation points in order to post more t ...

Invoke OnSelectedIndexChanged from GridView prior to any other function execution

In my scenario, there are two GridViews available. The first GridView allows the user to select a row, based on which a corresponding list will be displayed according to the selected GridView ID. First Grid: https://i.stack.imgur.com/d0OKq.png Second Gri ...

Error thrown: Upon attempting to reopen the modalbox after closing it, an uncaught TypeError is encountered, indicating that the function $(...).load

An unexpected error occurred: $(...).load(...).modal is not functioning properly After closing a modal, I encountered this error in the console when attempting to reopen it. Strangely, it seems to work intermittently for a few times before throwing this e ...

React js web application facing excessive content problem

I am encountering an overflow issue with the styles sheet I'm using on mobile and tablet views, but it works fine on desktop view. Can anyone provide a solution to this problem? I am developing a ReactJS web app hosted on Firebase. When I include fewe ...

Major Technical Issues Plague School-wide Celebration

In my JavaScript code, I am creating a 16x16 grid of divs. Each div should change its background color from black to white when the mouse enters (inherited based on a common class). However, I am facing an issue where all the divs change color simultaneou ...

There seems to be an issue with AngularJS $locationProvider.html5Mode not functioning properly in

My goal is to remove the hashtag from my ui-router URLs. I've found that http://localhost:3000/email doesn't work, but http://localhost:3000/#email does. Despite searching on Stack Overflow, I haven't been able to find a solution that works ...

Issue with close request on dialog box

Whenever an icon is clicked, a dialog box containing a form should appear. The purpose of this dialog box is to either add a new tab or delete a specific tab. In my implementation, I used ReactJS, Redux, and Material-UI for building the components. Even th ...

Add integer to an array of strings

Currently, I am utilizing an autocomplete feature and aiming to save the IDs of the selected users. My goal is to store these IDs in a string array, ensuring that all values are unique with no duplicates. I have attempted to push and convert the values u ...

Why is the click function being invoked twice, but exclusively on the initial click?

In my current project, I am facing an issue with the onClick action that is being passed down from Context. Strangely, when this action is clicked for the first time, it fires twice. However, from the second click onwards, it functions normally and only fi ...

What is the best way to iterate through an array containing multiple objects in order to create a graph?

My API response contains multiple objects organized in an array: [{"symbol":"AAPL","date":"2020-02-27","adj_close":68.24}, {"symbol":"TSLA","date":"2020-02-27","adj_close":133.8}, {"symbol":"TSLA","date":"2020-02-28","adj_close":122.3}, {"symbol":"AAPL" ...