Angular: ng-click in a directive

ng-click doesn't work within a directive

HTML

<div ng-controller="FormCtrl">
  <questions value="survey.questions" on-edit="editQuestion(question)"></questions>
</div>

JavaScript

var app = angular.module('myApp', []);

function FormCtrl ($scope) {
    $scope.editQuestion = function (question) {
        console.log(question);
        alert('abc');
    };
    
    $scope.survey = {
        questions: [
          {
            "_id": "518cd719cd245daf2500002e",
            "choices": [
              {
                "questions": [],
                "range": "",
                "name": "asd"
              },
              {
                "questions": [],
                "range": "",
                "name": "asdad"
              },
              {
                "questions": [
                  {
                    "type": "multiple select",
                    "inputType": null,
                    "choices": [
                      {
                        "questions": [],
                        "range": "",
                        "name": "asdas"
                      },
                      {
                        "questions": [],
                        "range": "",
                        "name": "sadasd"
                      },
                      {
                        "questions": [],
                        "range": "",
                        "name": "asdas"
                      }
                    ],
                    "help": "",
                    "options": {
                      "picture": false,
                      "aliasName": "",
                      "required": false
                    },
                    "name": "asdas"
                  }
                ],
                "range": "",
                "name": "adasd"
              }
            ],
            "name": "asd",
            "type": "multiple select",
            "options": {
              "required": false,
              "picture": false,
              "aliasName": ""
            },
            "help": "",
            "inputType": null
          },
          {
            "type": "multiple select",
            "choices": [
        ...