What steps should be taken to gain access to the FormController if the form is contained within a directive?

Here is the code for my custom directive:

restrict: 'E',
scope: {
},
templateUrl: 'directives/my.directive.html',
link: function(scope) { 
    // I want to be able to access "myForm" here (e.g., to setPristine(), etc.)
    scope.customVariable = {}
}

This is what the template looks like:

<form name="myForm" novalidate>
    <input name="inputOne" type="text" ng-model="customVariable.name" required />
</form>

I have tried the following:

console.log(scope.myForm) // returns undefined

and:

<form name="myForm" novalidate>
    <div ng-init="customVariable.newForm = myForm"></div>

    <input name="inputOne" type="text" ng-model="customVariable.name" required />
</form>

console.log(scope.customVariable.newForm) // returns Undefined

Please do not suggest using:

require: '^form' 

I am encountering an error: Unable to get FormController. This makes sense since the form is part of the directive and not the parent template/scope.

I would really appreciate some assistance with this.

Answer №1

Looking to obtain the form controller from a form? No worries, regardless of scope or even if you need to access it from a different controller, service, or directive, we've got an effortless solution for you: just utilize angular.element.

You can retrieve the form controller by using angular.element("[name='myForm']").controller("form");

Now, there's a small catch - the form must have been loaded and compiled into the DOM beforehand. However, as you're implementing this in your link function, the form should already be rendered. In case you receive an undefined response, consider wrapping it in a $timeout to allow the digest cycle to run smoothly.

$timeout(function() { angular.element("[name='myForm']").controller("form"); });

Admittedly, this may not qualify as the best practice, but when all other alternatives have been exhausted, it definitely comes in handy.

Answer №2

The availability of scope.myForm is crucial for your directive's controller or link function.

A sample implementation is shown below:

angular.module('app',[]).directive('myDirective', ['$compile', function($compile) {
  return {
    restrict: 'E',
    scope: {},
    template: '<form name="myForm"></form>',
    link: function(scope, element, attr) {
      alert("The scope.myForm object is accessible: " + scope.myForm);
      alert("$setPristine() method is also available: " + scope.myForm.$setPristine);
      alert("Additionally, the $error object can be utilized: " + scope.myForm.$error);
    }
  };
}]);
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="app">
  <my-directive></my-directive>
</div>

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