Angular JS Button ng-click doesn't call method - angularjs

Question

for now I read a lot of post for this problem, but none seems to have a solution.
In my angular app I created a new route with angular-fullstack:route
So here are my controller, template and config file:
controller:
'use strict';
(function() {
class AnmeldungCtrl {
constructor($http, $window, $uibModal, $state) {
}
searchUser(searchString) {
console.log("search Method");
if (searchString.isNaN()) {
this.state = "search";
console.log("search");
//TODO Search for name
}
else if (searchString >= 1000000) {
this.state = "anmeldung";
console.log("anmeldung");
//TODO Search for bar code
}
else {
this.state = "edit";
console.log("edit");
//TODO Search for Participant
}
}
}
angular.module('schwimmfestivalApp').controller('AnmeldungCtrl', AnmeldungCtrl);
})();
template:
<div>
<input type="text" ng-model="query" >
<button ng-click="ctrl.searchUser(query)">Search</button>
{{query}}
</div>
config file:
'use strict';
angular.module('schwimmfestivalApp')
.config(function ($stateProvider) {
$stateProvider
.state('anmeldung', {
url: '/anmeldung',
templateUrl: 'app/anmeldung/anmeldung.html',
controller: 'AnmeldungCtrl',
controllerAs: 'ctrl'
});
});
As I mention in my heading for some reason the method at the controller doesn't get called. And I have no idea why.
At my other routes it does work.
I hope you can give me a hint.
Thanks in advance.

Answer 1

Okay I got it to work. It was a fault at my point (as expected). A colleague of mine created a cnontroller in an other path with the same identifier.
So angular doesn't throw an error if something like this happened. Because the second controller was in a lower path it came at the include after the original controller.
Thanks to #MMhunter who put a console output at the constructor. This wasn't printed in my dev environment. So I started to search why, and found the second controller.
Thanks to all of you for your help.

Answer 2

try using just searchUser(query) it might work because controller is already added no need to call the function using controller