Dynamic controller - angularjs

Question

I have two nested directive and a few controllers and I want inject controller to second controller.
When I bind action to some button it work but list don't show up, some one know why?
Dynamic Controller directive
.directive("dynamicController", ["$compile", function($compile) {
return {
restrict: "A",
scope: {
dynamicController: "#"
},
compile: function(tElement, tAttrs) {
return {
pre: function preLink(scope, iElement, iAttrs, controller) {
iElement.attr("ng-controller", scope.dynamicController);
iElement.removeAttr("dynamic-controller");
$compile(iElement)(scope);
}
}
}
}
}])
V1: http://codepen.io/anon/pen/LVeaWo
V2: http://codepen.io/anon/pen/EjoJVx
[ EDIT ]
I almost do it but it's one more problem.
I have two directive:
.directive("wrapDirective", function() {
return {
restrict: "A",
template: "<div dynamic-controller=\"Ctr1\">" +
"<button ng-click='action()'>Click</button>" +
"<ul>" +
"<li ng-repeat=\"item in list\">{{item}}</li>" +
"</ul>" +
"</div>",
scope: {
controller: "#wrapDirective"
}
}
})
and
.directive("dynamicController", function($compile) {
return {
restrict: "A",
scope: true,
controller: "#",
name: "dynamicController"
}
})
The problem is this line <div dynamic-controller=\"Ctr1\"> in warpDirective
I can't do something like this <div dynamic-controller=\"{{controller}}\">
CodePen with both cases: http://codepen.io/anon/pen/EjoJXV

Answer 1

You should use require and link to get the controllers of parent directives.
See Creating Directives that Communicate.
.directive('myDirective', function() {
return {
require: '^ngController', // <-- define parent directive
restrict: 'E',
scope: {
title: '#'
},
link: function(scope, element, attrs, ctrl) { // <-- get the controller via the link function
ctrl.doSomething();
}
};

Answer 2

The reason behind your code is not working is, {{}} interpolation value is not evaluated in you pre link function. So by compiling ng-controller with not value in it is throwing an error. You should use iAttrs.$observe as you are evaluating expression inside {{}}.
Code
var dynamicControllerObserver = iAttrs.$observe('dynamicController', function(newVal, oldVal) {
wrapElement.attr("ng-controller", scope.dynamicController);
wrapElement.append(iElement.html());
console.log(wrapElement)
iElement.html("");
console.log(iElement)
iElement.append(wrapElement);
$compile(wrapElement)(scope);
dynamicControllerObserver(); //destruct observe
})
Working Codepen

Answer 3

I did it, really helpful was this post: Dynamic NG-Controller Name
I modified it to my needs:
.directive('dynamicCtrl', ['$compile', '$parse', function($compile, $parse) {
return {
restrict: 'A',
terminal: true,
scope: {
dynamicCtrl: "#"
},
link: function(scope, elem, attr) {
var initContent = elem.html();
var varName = getName(elem.attr('dynamic-ctrl'));
update();
scope.$watch("dynamicCtrl", function() {
update();
})
function update() {
var wrapper = angular.element("<div></div>");
wrapper.append(initContent);
var name = $parse(varName)(scope.$parent);
wrapper.attr('ng-controller', name);
elem.empty();
elem.append(wrapper);
$compile(wrapper)(scope);
}
function getName(attr) {
var startIndex = attr.lastIndexOf("{") + 1,
endIndex = attr.indexOf("}");
return attr.substring(startIndex, endIndex);
}
}
};
}])
http://codepen.io/anon/pen/xGYyqr