Setting ng-controller dynamically from a variable value

Question

I am developing an application using angularJs and nodejs. Am struck at setting the name of the controller to the value of a variable from main controller. To explain it better, my index.html looks like this :

        <tbody ng-repeat="group in groups">

        <tr ng-repeat="member in group.members" >
            <td rowspan="{{group.members.length}}" ng-hide="$index>=0">
            </td>

            <td>{{member.taskName}}</td>
            <td><div class={{group.colorMe[0]}}>{{member.env}}</div>
                <button class="btn btn-info" ng-controller="member.taskName" ng-click="test( member.taskName , 'env', group.colorMe[0])">Sanity</button>
            </td>

And my main Controller looks like this where the groups are defined as this :

  var tasks =['task1','task2','task3','task4','task5'];

      for(i=0;i<tasks.length;i++)

    {

    var group = {
                  "id" : i+1,
                  "members" : [{
                      "taskName":tasks[i].toUpperCase(),
                      "env1":versionMap["env1"+tasks[i]],
                      "env2":versionMap["env2"+tasks[i]],
                      "env3":versionMap["env3"+tasks[i]]

                  }]
                };
              $scope.groups.push(group);
              }

Now when i click the button , I should be direcrted to a particular controller and this controller name needs to be set dynamically to member.taskName . Can someone please help me with this?

@NareshKumar Trying the solution provided by Leguest. Any suggestions? — Nagireddy Hanisha
– Nagireddy Hanisha, Commented Apr 28, 2017 at 6:22
actually i am curious to know the answer to it @NagireddyHanisha — Naresh Kumar
– Naresh Kumar, Commented Apr 28, 2017 at 6:23

Leguest · Accepted Answer · 2017-04-28 09:45:32Z

2

You need to add some extra logic to your service. So it will require new dependencies such as: $controller, $compile, $root$scope or $scope. And optional one $templateCache. Templates are optional as well.

DEMO JSFiddle

Dynamic controller service:

var controllerTemplate = $templateCache.get(params.templateUrl); // getting inline template string

var templateScope = $rootScope.$new(true); // creating new scope for future controlelr
var templateCtrl = $controller(dynamicControllerName, { // creating controller
     $scope: templateScope // locals stuff that inject in controller           
});

var dynamicControllerElement = angular.element(controllerTemplate); // wrapping template into element

dynamicControllerElement.children().data('$ngControllerController', templateCtrl); // inject controller into element

var compiled = $compile(dynamicControllerElement)(templateScope); // compile all together

$('.container').html(compiled); // putting compiled into DOM (jQuery example)

More specific code for you:

Directive

 app.directive('dynamicControllerButton', function(dynamicControllerService){
    return {
      restrict: 'E',
      scope: {
         controllerName: '='
      },
      template: '<button class="btn btn-info">Sanity</button>', //added this comma
      link: function(scope, elem, attrs) {

           dynamicControllerService.createController(scope.controllerName, elem); // we passing also element;

    }

  }

})

Service

app.service('dynamicControllerService', function($rootScope, $controller, $compile){

     this.createController = function(dynamicControllerName, element) {

    // all that stuff in example above

      element.html(compiled); // adding compiled controller in element example ;

     }

})

HTML

    <tr ng-repeat="member in group.members" >
        <td rowspan="{{group.members.length}}" ng-hide="$index>=0">
        </td>

        <td>{{member.serviceName}}</td>
        <td><div class={{group.colorMe[0]}}>{{member.env}}</div>
            <dynamic-controller-button>  data-controller-name="dynamic_set_controller" ng-click="test( member.serviceName , 'env', group.colorMe[0])"></dynamic-controller-button>
        </td>

I hope it will help

edited Apr 28, 2017 at 9:45

answered Apr 28, 2017 at 5:45

Leguest

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7 Comments

Nagireddy Hanisha Over a year ago

What is a controller service? Where do I need to plug in that code?

Nagireddy Hanisha Over a year ago

Thanks for the detailed answer. Will try this out. :)

Nagireddy Hanisha Over a year ago

I could not follow how the value of the controller-name is being set and also, $controller, $compile, $root$scope or $scope, $templateCache that you suggested, should all 5 of these be in the main controller or in my nested controller that I am setting?

Leguest Over a year ago

No they being set only in dynamicControllerService . controller-name passed into directive dynamicControllerButton , and then passed to service method createController

Leguest Over a year ago

Yes, you are right. As I said tempates are optional, so you could do something like var controllerTemplate = '<button>Sanity</button>'. And don't even use $tempalteCache` at all

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