The AngularJS modal is sending back the results before updating the parent scope

Question

The AngularJS modal is sending back the results before updating the parent scope

When launching a modal from my web page, I am updating an array passed from the parent. However, when closing the modal and sending back the updated results, the parent scope object is also being updated. If the user decides not to update and cancels the modal, I do not want those changes reflected in my parent controller.

Parent Controller Code:

const modalInstance = $modal.open({ templateUrl: '/app/modal.html', controller: 'modalController', controllerAs: 'modal', resolve: {
mappedData: () => parentCntrl.groupData } });
```
        modalInstance.result.then(result => {
            if (result) {                   
                parentCntrl.groupData = result;
            }
        });
```
Child Controller Code:

modal.ok = () => { $modalInstance.close(modal.mappedData); };

modal.close = () => { $modalInstance.close(); };

javascript angularjs twitter-bootstrap angular-ui-bootstrap

Answer 1

Answer №1

When passing non-primitive data types, like objects or arrays, in JavaScript, the reference to the original data is passed instead of a copy.

To prevent unintended changes to the original data, it is recommended to create a copy of the data before making any modifications. This copied version should be used within the modal, and any changes made should be merged back to the original object in the parent controller upon saving.

A similar question addressing reference issues when using AngularJS can be found here. It explains how the angular.copy() function can be utilized to avoid these reference problems.

Answer 2

When passing non-primitive data types, like objects or arrays, in JavaScript, the reference to the original data is passed instead of a copy.

To prevent unintended changes to the original data, it is recommended to create a copy of the data before making any modifications. This copied version should be used within the modal, and any changes made should be merged back to the original object in the parent controller upon saving.

A similar question addressing reference issues when using AngularJS can be found here. It explains how the angular.copy() function can be utilized to avoid these reference problems.

Answer 3

Answer №2

When creating a new $uibModal instance, it is important to specify a configuration object. In this object, the scope : should point to the scope that the modal will use. Typically, you would set it as scope: $rootScope. This ensures that any variables with matching names in the modal controller and parent scope are referring to the same object. Some suggestions from comments include using angular.copy() or $rootScope.new();

var modalInstance = $uibModal.open({
  ...
  scope : $rootScope.new(),
  //or
  scope : angular.copy($scope)
  ...
});

I trust that this information proves useful.

Answer 4

When creating a new $uibModal instance, it is important to specify a configuration object. In this object, the scope : should point to the scope that the modal will use. Typically, you would set it as scope: $rootScope. This ensures that any variables with matching names in the modal controller and parent scope are referring to the same object. Some suggestions from comments include using angular.copy() or $rootScope.new();

var modalInstance = $uibModal.open({
  ...
  scope : $rootScope.new(),
  //or
  scope : angular.copy($scope)
  ...
});

I trust that this information proves useful.

Answer 5

Answer №3

Give this straightforward code a try.

HTML:

<tr ng-repeat="users in list">
  <td>{{users.firstname}}</td>
  <td>{{users.lastname}}</td>
  <button class="btn btn-primary" data-toggle="modal" data-target="#myModal" ng- 
  click="selectUser(users)">Edit Info</button>
</tr>

Controller:

$scope.selectUser = function(users){
            $scope.clickedUser = users;
            $scope.modalInfo = angular.copy($scope.clickedUser);
    };

Modal:

<div class="modal fade" id="myModal" role="dialog">
  <div class="modal-dialog">
    <div class="modal-content">
        <div class="modal-header">
            <button type="button" class="close" data-dismiss="modal">&times;</button>
            <h2 class="modal-title">Update bio</h2>
        </div>
        <div class="modal-body">
            <input type="text" ng-model="modalInfo.firstname">
            <input type="text" ng-model="modalInfo.lastname">
        </div>
        <div class="modal-footer">
            <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
        </div>
    </div>
</div>

Answer 6

Give this straightforward code a try.

HTML:

<tr ng-repeat="users in list">
  <td>{{users.firstname}}</td>
  <td>{{users.lastname}}</td>
  <button class="btn btn-primary" data-toggle="modal" data-target="#myModal" ng- 
  click="selectUser(users)">Edit Info</button>
</tr>

Controller:

$scope.selectUser = function(users){
            $scope.clickedUser = users;
            $scope.modalInfo = angular.copy($scope.clickedUser);
    };

Modal:

<div class="modal fade" id="myModal" role="dialog">
  <div class="modal-dialog">
    <div class="modal-content">
        <div class="modal-header">
            <button type="button" class="close" data-dismiss="modal">&times;</button>
            <h2 class="modal-title">Update bio</h2>
        </div>
        <div class="modal-body">
            <input type="text" ng-model="modalInfo.firstname">
            <input type="text" ng-model="modalInfo.lastname">
        </div>
        <div class="modal-footer">
            <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
        </div>
    </div>
</div>

The AngularJS modal is sending back the results before updating the parent scope

Answer №1

Answer №2

Answer №3

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