Unable to invoke the form submission function from template in AngularJS

Question

Unable to invoke the form submission function from template in AngularJS

After loading a form from a conditional templateUrl, I am encountering issues with calling functions on submission. The form works fine when directly inserted into the page, but not when dynamically inserted. The controller is globally set for the page in the body tag. Any suggestions on how to resolve this issue?

<form role="form" ng-submit="message.send_message()">
<div class="form-group">
    <label class="control-label" for="message_title">Title</label>
    <input ng-model="message.message_title" type="text" class="form-control  col-xs-3" " name="message_title" id="message_title">
</div>
<div class="form-group">
    <label class="control-label" for="message_body">Body</label>
    <textarea ng-model="message.message_body" rows="" rows="5" class="form-control col-xs-3" name="message_body" id="message_body"></textarea>
</div>
<input ng-model="message.message_event_id" type="hidden" id="message_event_id" name="message_event_id" value="{{event.event_id}}">
<button ng-click="message.send_message()"  type="button" class="btn btn-info" style="margin: 1em 25% 1em 25%">New Message</button>
</form>

 $scope.message = {};
     // send message function
     $scope.message.send_message = function (message) {
         console.log("send_message called");
         var result = {};
         result = angular.copy(message);
         console.dir(result);
     }

javascript forms angularjs

Answer 1

Answer №1

When you define the scope in your directive

 scope: {
           isOk: '@'
        },

You are creating a isolated scope for the directive, separate from the controller's scope. This is why the

ng-click="send_message(bodymessage)"

did not work as expected (it looked for send_message within the directive's scope)

If you want to access the controller's scope in your directive, you can remove scope: { ... } from the directive and use isOk directly in the controller's scope

For example:

Plunker

# Keep in mind that it is often recommended to keep the directive's scope separate from the controller's scope

Answer 2

When you define the scope in your directive

 scope: {
           isOk: '@'
        },

You are creating a isolated scope for the directive, separate from the controller's scope. This is why the

ng-click="send_message(bodymessage)"

did not work as expected (it looked for send_message within the directive's scope)

If you want to access the controller's scope in your directive, you can remove scope: { ... } from the directive and use isOk directly in the controller's scope

For example:

Plunker

# Keep in mind that it is often recommended to keep the directive's scope separate from the controller's scope

Answer 3

Answer №2

To ensure your directive is reusable, it is important to maintain the isolated scope and utilize the & binding. This binding creates a helper function that allows you to call a function in the outer scope (plnkr):

Html:

<script type="text/ng-template" id="DirectiveTemplate.html">
  <input ng-model="directiveText">
  <p>You entered {{directiveText}}</p>
  <button ng-click="buttonClicked()">Do It</button>
  <button ng-click="mySubmit({directiveMessage: directiveText})">Another Way</button>
</script>

<h1>Hello Plunker!</h1>
<my-directive my-submit="sendMessage(directiveMessage)"/>

Javascript:

angular.module('MyApp', [])
  .directive('myDirective', function() {
    return {
      restrict: "E",
      scope: {
         mySubmit: '&',
      },
      transclude: true,
      templateUrl: 'DirectiveTemplate.html',
      link: function(scope, element, attrs) {
        scope.buttonClicked = function() {
          scope.mySubmit({directiveMessage: scope.directiveText});
        }
      }
    }
  })
  .controller('MyCtrl', function($scope) {
    $scope.sendMessage = function(message) {
       alert(message);
    }
  })

directiveText is a property of the isolated scope. Angular generates the mySubmit helper function within the isolated scope, enabling a similar functionality to ng-click. By passing an object with named parameters such as directiveMessage to this function, those properties become accessible within the called function. The distinction between directiveText and directiveMessage showcases how values are passed through for binding to message in the subsequent function.

Answer 4

To ensure your directive is reusable, it is important to maintain the isolated scope and utilize the & binding. This binding creates a helper function that allows you to call a function in the outer scope (plnkr):

Html:

<script type="text/ng-template" id="DirectiveTemplate.html">
  <input ng-model="directiveText">
  <p>You entered {{directiveText}}</p>
  <button ng-click="buttonClicked()">Do It</button>
  <button ng-click="mySubmit({directiveMessage: directiveText})">Another Way</button>
</script>

<h1>Hello Plunker!</h1>
<my-directive my-submit="sendMessage(directiveMessage)"/>

Javascript:

angular.module('MyApp', [])
  .directive('myDirective', function() {
    return {
      restrict: "E",
      scope: {
         mySubmit: '&',
      },
      transclude: true,
      templateUrl: 'DirectiveTemplate.html',
      link: function(scope, element, attrs) {
        scope.buttonClicked = function() {
          scope.mySubmit({directiveMessage: scope.directiveText});
        }
      }
    }
  })
  .controller('MyCtrl', function($scope) {
    $scope.sendMessage = function(message) {
       alert(message);
    }
  })

directiveText is a property of the isolated scope. Angular generates the mySubmit helper function within the isolated scope, enabling a similar functionality to ng-click. By passing an object with named parameters such as directiveMessage to this function, those properties become accessible within the called function. The distinction between directiveText and directiveMessage showcases how values are passed through for binding to message in the subsequent function.

Unable to invoke the form submission function from template in AngularJS

Answer №1

Answer №2

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