ng-model is not updated in ng-if - angularjs

Question

I'm failing to retrieve the actual value of my selected option (ng-model=filter) in my select html bloc.
Note that if I don't set $scope.filter then $scope.filter stay undefined even if I select an option in the dropdown list.
My html template, filters.html :
<div ng-if="!showFilterTemplatePlz">
<button class="btn btn-primary" ng-click="showFilterTemplate()" type="button">Add Filter</button>
</div>
<div ng-if="showFilterTemplatePlz" class="inline">
<button class="btn btn-primary" ng-click="closeFilters()" type="button">Close filters</button>
<label>filters</label>
<select ng-model="filter" ng-options="filter.name for filter in filterOptions" class="form-control">
</select>
<p>{{filter.name}}</p>
<button ng-click="addFilter()" id="addFilterButton" class="btn btn-primary btn-sm btn-default" type="button"><i class="fa fa-plus"></i> Add</button>
</div>
In my directive:
.directive('filters', ['retrieveStaticDatasService','usersService', function(datasService, usersService) {
return {
restrict: 'E',
scope: false,
controller: function ($scope) {
/* init */
$scope.filterOptions = [
{name: "languages"},
{name: "nationality"},
{name: "location"}
];
$scope.filter = $scope.filterOptions[0];
/* end init */
$scope.showFilterTemplate = function(){
$scope.showFilterTemplatePlz=true;
}
$scope.closeFilters = function(){
$scope.showFilterTemplatePlz=false;
}
$scope.addFilter = function(){
console.log("filter to add : " + $scope.filter.name);
}
},
templateUrl: '/partials/components/filters.html'
}
}])
Result :
I can see the actual value appears in my html but i will always show "languages" for$scope.filter.name in my console, whatever option I selected! I took a screenshot to show you : http://hpics.li/4a37ae3
Thanks for your help.
[Edit : I made some test and my model are setted and updated only if they are not inside the "<div ng-if="..."></div>"]. Is it not allowed to put a ng-if directly in the directive?
Answer : Angularjs ng-model doesn't work inside ng-if

Answer 1

I found the solution, the problem was that ng-if creates a child scope. So I changed filter to $parent.filter in
<select ng-model="$parent.filter" ng-options="option.name for option in filterOptions" class="form-control">
</select>

Answer 2

I think you are confusing it by having to objects named 'filter'. You might be overwriting the ng-options object rather than your controller one.
Try changing to
<select ng-model="filter" ng-options="option.name for option in filterOptions" class="form-control"></select>
<p>{{filter.name}}</p>
<button ng-click="addFilter()" id="addFilterButton" class="btn btn-primary btn-sm btn-default" type="button"><i class="fa fa-plus"></i> Add</button>