The communication between the view and the model is failing in Angular JS, causing data not to be

Question

The communication between the view and the model is failing in Angular JS, causing data not to be

I'm encountering an issue where the text field input in my view is not binding to the controller.

Below is the snippet from the view:

<md-dialog-content ng-if="mode=='addSentence'" class="sticky-container">
    <md-input-container>
        <label for="sentence-text">Enter the sentence to be corrected</label>
        <input ng-model="theSentence" name="sentence-text"/>
    </md-input-container>
    <span flex>{{ error }}</span>
    <md-button class="primary" style="float:right;" aria-label="Save" ng-click="saveNewSentence()">Save</md-button>
</md-dialog-content>

And here's the related function in the controller:

function ViewSentenceController($scope, $rootScope, $mdDialog) {
    $scope.mode = mode;
    $scope.user = user;
    $scope.theSentence = null;

    $scope.saveNewSentence = function() {
        console.log($scope.theSentence);
    }

    $scope.cancel = function() { $mdDialog.hide(); }

}

After invoking saveNewSentence(), it consistently logs a value of null to the console, even when there is input in the textfield.

I feel like I must be overlooking something simple, as I've spent an excessive amount of time on this seemingly straightforward issue. Any help would be greatly appreciated!

javascript angularjs mddialog

Answer 1

Answer №1

The dialogue possesses its own $scope. Therefore:

 <input ng-model="$parent.theSentence" name="sentence-text"/>
    </md-input-container>

Answer 2

The dialogue possesses its own $scope. Therefore:

 <input ng-model="$parent.theSentence" name="sentence-text"/>
    </md-input-container>

Answer 3

Answer №2

To ensure the scope is preserved, consider adding 'preserveScope: true' to your md-dialog options. If that doesn't work, try modifying your ng-model to something like "dialogObj.theSentence" and access it using

console.log($scope.dialogObj.theSentence);

Answer 4

To ensure the scope is preserved, consider adding 'preserveScope: true' to your md-dialog options. If that doesn't work, try modifying your ng-model to something like "dialogObj.theSentence" and access it using

console.log($scope.dialogObj.theSentence);

Answer 5

Answer №3

If you could provide a JSFiddle link with your entire code block, I would be able to assist you better. However, here's an example where I have created two input fields initially set to null and then continuously update my ng-model.

<body data-ng-app="formApp">
<div data-ng-controller="FormCtrl">
    <p>
        Name of Topic: <input type="text" data-ng-model="formData.title" placeholder="enter a title" />
    </p>
    Subscribers:
    <button data-ng-click="addSubscriber()">Add subscriber</button>
    <table>
        <tr>
            <th>Name</th>
            <th>Email</th>
        </tr>
        <tr data-ng-repeat="subscriber in formData.subscribers">
            <td><input type="text" data-ng-model="subscriber.name" placeholder="enter name" /></td>
            <td><input type="text" data-ng-model="subscriber.email" placeholder="enter email" /></td>
        </tr>
    </table>
    <hr style="margin:1em 0;" />
    <p>
        <em>Debug info</em>: {{ formData }}
    </p>
</div>

And the corresponding JavaScript code is as follows.

(function() {
var formApp = angular.module("formApp", []);
formApp.controller("FormCtrl", function ($scope, $timeout) {
    $scope.formData = {};
    $scope.formData.subscribers = [
        { name: null, email: null }
    ];
    $scope.addSubscriber = function() {
        $scope.formData.subscribers.push({ name: null, email: null });
    };
});
})();

Let me know if this explanation helps.

Answer 6

If you could provide a JSFiddle link with your entire code block, I would be able to assist you better. However, here's an example where I have created two input fields initially set to null and then continuously update my ng-model.

<body data-ng-app="formApp">
<div data-ng-controller="FormCtrl">
    <p>
        Name of Topic: <input type="text" data-ng-model="formData.title" placeholder="enter a title" />
    </p>
    Subscribers:
    <button data-ng-click="addSubscriber()">Add subscriber</button>
    <table>
        <tr>
            <th>Name</th>
            <th>Email</th>
        </tr>
        <tr data-ng-repeat="subscriber in formData.subscribers">
            <td><input type="text" data-ng-model="subscriber.name" placeholder="enter name" /></td>
            <td><input type="text" data-ng-model="subscriber.email" placeholder="enter email" /></td>
        </tr>
    </table>
    <hr style="margin:1em 0;" />
    <p>
        <em>Debug info</em>: {{ formData }}
    </p>
</div>

And the corresponding JavaScript code is as follows.

(function() {
var formApp = angular.module("formApp", []);
formApp.controller("FormCtrl", function ($scope, $timeout) {
    $scope.formData = {};
    $scope.formData.subscribers = [
        { name: null, email: null }
    ];
    $scope.addSubscriber = function() {
        $scope.formData.subscribers.push({ name: null, email: null });
    };
});
})();

Let me know if this explanation helps.

Answer 7

Answer №4

By passing the 'binded' data as the function's parameters instead of letting Angular bind the data from the Textfield, I managed to solve the issue. I called saveNewSentence() with the parameter theSentence like this: saveNewSentence(theSentence). Surprisingly, it worked. It may seem like a simple trick, but as they say:

If it's stupid and it works, then it ain't stupid.

Hopefully, this solution will be helpful for others facing similar challenges.

Answer 8

By passing the 'binded' data as the function's parameters instead of letting Angular bind the data from the Textfield, I managed to solve the issue. I called saveNewSentence() with the parameter theSentence like this: saveNewSentence(theSentence). Surprisingly, it worked. It may seem like a simple trick, but as they say:

If it's stupid and it works, then it ain't stupid.

Hopefully, this solution will be helpful for others facing similar challenges.

The communication between the view and the model is failing in Angular JS, causing data not to be

Answer №1

Answer №2

Answer №3

Answer №4

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