Angular Material's md-checkbox is a required component

Question

Angular Material's md-checkbox is a required component

I am working on a form that consists of checkboxes representing the days of the week. When the user hits submit without selecting any checkboxes, I want an error message to appear. Here is the HTML code snippet that I have:

<form id="addEditForm" name="addEditForm" ng-submit="addEditForm.$valid && saveBooking()" novalidate>
    <div ng-repeat="item in days">
        <md-checkbox ng-required="daysSelected.length == 0" ng-checked="dayExists(item, daysSelected)" ng-click="toggleWeekdays(item, daysSelected)" name="daysOfWeek">{{ item }}</md-checkbox>
    </div>

    <div flex ng-messages="addEditForm.daysOfWeek.$error" ng-if="addEditForm.$submitted">
        <div ng-message="required">Please select a day.</div>
    </div>

    <md-button aria-label="Save Booking" class="md-primary-short" type="submit">Save</md-button>
</form>

javascript angularjs checkbox

Answer 1

Answer №1

It appears that there is no submit button provided in your example, but it is likely present somewhere in your HTTP code.

I recommend utilizing the Dialog directive to showcase your message from the controller. You can verify if the item list meets the expected length (based on the logic already in place) and show the message if the conditions are not met.

UPDATE

To address this issue, you could introduce a marker in your controller, like: $scope.sentinel = []

Upon checking a box, simply add its value to the sentinel array:

$scope.sentinel.push(yourValue)

Then, when the submit button is clicked, verify its length:

if ($scope.sentinel.length == 0) {
  $scope.displayError = true;
}

This is a straightforward approach I have devised. Remember to initialize the $scope.displayError variable as false and switch it to true when the condition is satisfied.

Answer 2

It appears that there is no submit button provided in your example, but it is likely present somewhere in your HTTP code.

I recommend utilizing the Dialog directive to showcase your message from the controller. You can verify if the item list meets the expected length (based on the logic already in place) and show the message if the conditions are not met.

UPDATE

To address this issue, you could introduce a marker in your controller, like: $scope.sentinel = []

Upon checking a box, simply add its value to the sentinel array:

$scope.sentinel.push(yourValue)

Then, when the submit button is clicked, verify its length:

if ($scope.sentinel.length == 0) {
  $scope.displayError = true;
}

This is a straightforward approach I have devised. Remember to initialize the $scope.displayError variable as false and switch it to true when the condition is satisfied.

Angular Material's md-checkbox is a required component

Answer №1

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