AngularJS evaluate $rootScope variable in directiv

问题:

I have a directive that creates an input field. I need to set the ng-model attribute of this input field to the value of a $rootScope variable. The reason behind this is that I want the input field to be in the layout, and bind to different models depending on what page is loaded. I thought I'd set this global variable in each controller and access it in the Directive.

ATM the variable is hard coded

App.run(function($rootScope){
    $rootScope.mymodel = 'search.name';
})

And the Directive

Directives.directive('inputFilter', function(){
    return{
        restrict: 'E',
        replace:true,
        controller: function($scope, $rootScope){
            console.log($scope.mymodel);
            console.log($rootScope.mymodel)

        },
        template: '<input class="filter" type="text" ng-model="mymodel" placeholder="Nach filtern">'
    }

});

It gets rendered as

<input class="filter ng-pristine ng-valid" type="text" ng-model="mymodel" placeholder="Filter">

and the text inside the input field is the value of mymodel variable. The console.log shows

search.name
search.name  

Could anyone please shed some light on this issue?

回答1:

What I think you want is

template: '<input class="filter" type="text" ng-model="' 
  + $rootScope.mymodel + '" placeholder="Nach filtern">'

Fiddle.

Note that you will need to inject $rootScope into your directive:

Directives.directive('inputFilter', function($rootScope) {