title: Controller 'ngModel', required by directive '...', can't be found
body: <p>What's going on here?</p>
  
  <p>Here is my directive:</p>
  
  <pre><code>app.directive('submitRequired', function (objSvc) {
      return {
          require: 'ngModel',
          link: function (scope, elm, attrs, ctrl) {
  
            // do something
          }
      };
  });
  </code></pre>
  
  <p>Here is an example of the directive in use: </p>
  
  <pre><code>&lt;input submit-required="true"&gt;&lt;/input&gt;
  </code></pre>
  
  <p>Here is the actual error text:</p>
  
  <pre><code>Error: [$compile:ctreq] Controller 'ngModel', required by directive 'submitRequired', can't be found!
  http://errors.angularjs.org/1.2.2/$compile/ctreq?p0=ngModel&amp;p1=submitRequired
      at http://www.domain.ca/Scripts/angular/angular.js:78:12
      at getControllers (http://www.domain.ca/Scripts/angular/angular.js:5972:19)
      at nodeLinkFn (http://www.domain.ca/Scripts/angular/angular.js:6139:35)
      at compositeLinkFn (http://www.domain.ca/Scripts/angular/angular.js:5550:15)
      at nodeLinkFn (http://www.domain.ca/Scripts/angular/angular.js:6132:24)
      at compositeLinkFn (http://www.domain.ca/Scripts/angular/angular.js:5550:15)
      at publicLinkFn (http://www.domain.ca/Scripts/angular/angular.js:5458:30)
      at http://www.domain.ca/Scripts/angular/angular.js:1299:27
      at Scope.$get.Scope.$eval (http://www.domain.ca/Scripts/angular/angular.js:11634:28)
      at Scope.$get.Scope.$apply (http://www.domain.ca/Scripts/angular/angular.js:11734:23) &lt;input submit-required="true"&gt; angular.js:9159
  (anonymous function) angular.js:9159
  $get angular.js:6751
  nodeLinkFn angular.js:6141
  compositeLinkFn angular.js:5550
  nodeLinkFn angular.js:6132
  compositeLinkFn angular.js:5550
  publicLinkFn angular.js:5458
  (anonymous function) angular.js:1299
  $get.Scope.$eval angular.js:11634
  $get.Scope.$apply angular.js:11734
  (anonymous function) angular.js:1297
  invoke angular.js:3633
  doBootstrap angular.js:1295
  bootstrap angular.js:1309
  angularInit angular.js:1258
  (anonymous function) angular.js:20210
  trigger angular.js:2315
  (anonymous function) angular.js:2579
  forEach angular.js:300
  eventHandler angular.js:2578ar.js:7874
  </code></pre>